6. Definitions
RMON2-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, Counter32, Integer32, Gauge32, IpAddress, TimeTicks, mib-2 FROM SNMPv2-SMI TEXTUAL-CONVENTION, RowStatus, DisplayString, TimeStamp FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF ifIndex FROM IF-MIB OwnerString, statistics, history, hosts, matrix, filter, etherStatsEntry, historyControlEntry, hostControlEntry, matrixControlEntry, filterEntry, channelEntry FROM RMON-MIB tokenRing, tokenRingMLStatsEntry, tokenRingPStatsEntry,
ringStationControlEntry, sourceRoutingStatsEntry FROM TOKEN-RING-RMON-MIB; -- Remote Network Monitoring MIB rmon MODULE-IDENTITY LAST-UPDATED "200605020000Z" -- May 2, 2006 ORGANIZATION "IETF RMON MIB Working Group" CONTACT-INFO "Author: Steve Waldbusser Phone: +1-650-948-6500 Fax : +1-650-745-0671 Email: waldbusser@nextbeacon.com Working Group Chair: Andy Bierman E-mail: ietf@andybierman.com Working Group Mailing List: <rmonmib@ietf.org> To subscribe send email to: <rmonmib-request@ietf.org> " DESCRIPTION "The MIB module for managing remote monitoring device implementations. This MIB module extends the architecture introduced in the original RMON MIB as specified in RFC 2819. Copyright (C) The Internet Society (2006). This version of this MIB module is part of RFC 4502; see the RFC itself for full legal notices." REVISION "200605020000Z" -- May 2, 2006 DESCRIPTION "This version updates the proposed-standard version of the RMON2 MIB (published as RFC 2021) by adding 2 new enumerations to the nlMatrixTopNControlRateBase object and 4 new enumerations to the alMatrixTopNControlRateBase object. These new enumerations support the creation of high-capacity topN reports in the High Capacity RMON MIB [RFC3273]. Additionally, the following objects have been deprecated, as they have not had enough independent implementations to demonstrate interoperability to meet the requirements of a Draft Standard: probeDownloadFile probeDownloadTFTPServer probeDownloadAction probeDownloadStatus
serialMode serialProtocol serialTimeout serialModemInitString serialModemHangUpString serialModemConnectResp serialModemNoConnectResp serialDialoutTimeout serialStatus serialConnectDestIpAddress serialConnectType serialConnectDialString serialConnectSwitchConnectSeq serialConnectSwitchDisconnectSeq serialConnectSwitchResetSeq serialConnectOwner serialConnectStatus netConfigIPAddress netConfigSubnetMask netConfigStatus netDefaultGateway tokenRingMLStats2DroppedFrames tokenRingMLStats2CreateTime tokenRingPStats2DroppedFrames tokenRingPStats2CreateTime ringStationControl2DroppedFrames ringStationControl2CreateTime sourceRoutingStats2DroppedFrames sourceRoutingStats2CreateTime trapDestIndex trapDestCommunity trapDestProtocol trapDestAddress trapDestOwner trapDestStatus In addition, two corrections were made. The LastCreateTime Textual Convention had been defined with a base type of another textual convention, which isn't allowed in SMIv2. The definition has been modified to use TimeTicks as the base type. Further, the SerialConfigEntry SEQUENCE definition included sub-typing information that is not allowed in SMIv2. This information has been deleted. Ranges were added to a number of objects and textual-conventions to constrain their maximum (and sometimes minimum) sizes. The addition of these ranges documents existing practice for these objects. These objects
are: ControlString protocolDirID protocolDirParameters addressMapNetworkAddress nlHostAddress nlMatrixSDSourceAddress nlMatrixSDDestAddress nlMatrixDSSourceAddress nlMatrixDSDestAddress nlMatrixTopNSourceAddress nlMatrixTopNDestAddress alHostEntry alMatrixSDEntry alMatrixDSEntry alMatrixTopNSourceAddress alMatrixTopNDestAddress Finally, the TimeFilter TC has been updated to encourage agent implementations that allow a MIB walk to behave well even when performed by an application that is not aware of the special TimeFilter semantics." REVISION "200207080000Z" -- 08 July, 2002 DESCRIPTION "Added new enumerations to support the High-Capacity RMON MIB as defined in RFC 3273. Also fixed some typos and added clarifications." REVISION "199605270000Z" -- 27 May, 1996 DESCRIPTION "Original version. Published as RFC 2021." ::= { mib-2 16 } -- { rmon 1 } through { rmon 10 } are defined in RMON and -- the Token Ring RMON MIB [RFC1513] protocolDir OBJECT IDENTIFIER ::= { rmon 11 } protocolDist OBJECT IDENTIFIER ::= { rmon 12 } addressMap OBJECT IDENTIFIER ::= { rmon 13 } nlHost OBJECT IDENTIFIER ::= { rmon 14 } nlMatrix OBJECT IDENTIFIER ::= { rmon 15 } alHost OBJECT IDENTIFIER ::= { rmon 16 } alMatrix OBJECT IDENTIFIER ::= { rmon 17 } usrHistory OBJECT IDENTIFIER ::= { rmon 18 } probeConfig OBJECT IDENTIFIER ::= { rmon 19 } rmonConformance OBJECT IDENTIFIER ::= { rmon 20 }
-- Textual Conventions ZeroBasedCounter32 ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "This TC describes an object that counts events with the following semantics: objects of this type will be set to zero(0) on creation and will thereafter count appropriate events, wrapping back to zero(0) when the value 2^32 is reached. Provided that an application discovers the new object within the minimum time to wrap, it can use the initial value as a delta since it last polled the table of which this object is part. It is important for a management station to be aware of this minimum time and the actual time between polls, and to discard data if the actual time is too long or there is no defined minimum time. Typically, this TC is used in tables where the INDEX space is constantly changing and/or the TimeFilter mechanism is in use." SYNTAX Gauge32 LastCreateTime ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "This TC describes an object that stores the value of the sysUpTime object at the last time its entry was created. This can be used for polling applications to determine that an entry has been deleted and re-created between polls, causing an otherwise undetectable discontinuity in the data. If sysUpTime is reset to zero as a result of a re- initialization of the network management (sub)system, then the values of all LastCreateTime objects are also reset. However, after approximately 497 days without a re- initialization, the sysUpTime object will reach 2^^32-1 and then increment to zero; in this case, existing values of TimeStamp objects do not change. This can lead to ambiguities in the value of TimeStamp objects." SYNTAX TimeTicks TimeFilter ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "To be used for the index to a table. Allows an application to download only those rows changed since a particular time.
Note that this is not a history mechanism. Only current values of underlying objects are returned; saved instance values associated with particular values of sysUpTime are not. An entry is considered changed if the value of any object in the entry changes, if the row is created, or if any object in the entry is created or deleted. Note that deleted entries cannot be detected or downloaded. A time-filtered conceptual table is created by inserting a single object of SYNTAX TimeFilter as the first INDEX component in a copy of an existing basic conceptual table (i.e., any SEQUENCE without a TimeFilter INDEX component). Thus, for each conceptual entry 'I' in the basic table, there exists N conceptual entries in the time-filtered version, indexed N.I, where 'N' is equal to the value of sysUpTime. When an application retrieves conceptual instances from a time-filtered table, and an INDEX value is provided for the TimeFilter INDEX component 'N', the agent will only consider returning basic conceptual entries (e.g., 'fooColumn.N.I') if any column within the basic conceptual entry has changed since sysUpTime 'N'. If not, the basic conceptual entry will be ignored for the particular retrieval operation. When sysUpTime is equal to zero, this table shall be empty. One conceptual entry exists for each past value of sysUpTime, except that the whole table is purged should sysUpTime wrap. As an entry in a time-filtered table is updated (i.e., one of the columns in the basic conceptual table is changed), new conceptual entries are also created in the time-filtered version (which still shares the now updated object values with all other instances). The number of unique time-filtered instances that are created is determined by the value of sysUpTime at which the basic entry was last updated. One unique instance will exist for each value of sysUpTime at the last update time for the row. However, a new TimeFilter index instance is created for each new sysUpTime value. The TimeFilter index values not associated with entry updates are called duplicate time-filtered instances. After some deployment experience, it has been determined that a time-filtered table is more efficient if the agent stops a MIB walk operation by skipping over rows with a TimeFilter index value higher than the value in the received GetNext/GetBulk request. That is, instead of incrementing a TimeFilter index value, the agent will continue to the next
object or table. As a consequence, GetNext or GetBulk operations will provide only one pass through a time-filtered table. It is suggested that an agent implement a time-filtered table in this manner to improve performance and avoid a MIB walk getting stuck in time-filtered tables. It is, however, still acceptable for an agent to implement a time-filtered table in the traditional manner (i.e., every conceptual time-filtered instance is returned in GetNext and GetBulk PDU responses), and management applications must be able to deal with such traditional implementations. See the appendix for further discussion of this textual convention. The following example is provided to demonstrate TimeFilter behavior: Consider the following basic conceptual table, basicFooTable. (Note that the basic version of a time-filtered table may not actually be defined.) basicFooTable: basicFooTable ... INDEX { fooIndex } BasicFooEntry { fooIndex Integer32, fooCounts Counter32 } For this example, the basicFooTable contains two static conceptual entries (fooIndex equals '1' and '2'), created at time zero. It also contains one dynamic conceptual entry (fooIndex equals '3'), which is created at time '3' and deleted at time '7'. The time-filtered version of the basicFooTable could be defined as follows: FooTable: fooTable ... INDEX { fooTimeMark, fooIndex } FooEntry {
fooTimeMark TimeFilter, fooIndex Integer32, fooCounts Counter32 } Note that entries exist in the time-filtered conceptual table only if they actually exist in the underlying (basic) table. For this example, the fooTable will have three underlying basic entries (fooIndex == 1, 2, and 3), with the following activity (for sysUpTime equal 0 to 9): - fooEntry.N.1 is created at time '0' and most recently updated at time '6' to the value '5'. - fooEntry.N.2 is created at time '0' and most recently updated at time '8' to the value '9'. - fooEntry.N.3 is created at time '3', updated at time '5' to the value '17', and deleted at time '7'. The following tables show the values that would be returned for MIB walk operations with various TimeFilter values, done at different times. An application issues a retrieval request at time 'T', with a TimeFilter value, 'N' (typically set to a lower value, such as the value of sysUpTime at the last polling cycle). The following values would be returned in a MIB walk of fooCounts.N if T equals '0' and N equals '0': fooCounts.N.I Value ========================== fooCounts.0.1 0 fooCounts.0.2 0 Note that nothing is returned for fooCounts.0.3, since that entry does not exist at sysUpTime equals '0'. The following values would be returned in a full (traditional) MIB walk of fooCounts.N if T equals '3' and N equals '0': fooCounts.N.I Value ======================= fooCounts.0.1 0 fooCounts.0.2 0 fooCounts.0.3 0 fooCounts.1.3 0 fooCounts.2.3 0 fooCounts.3.3 0
Note that there are no instances for T equals 1 or 2 for the first two values of N, as these entries did not change since they were created at time '0'. Note that the current value for 'fooCounts.N.3' is returned here, even for values of N less than '3' (when the entry was created). The agent only considers the current existence of an entry in the TimeFilter algorithm, not the time when the entry was created. Note that the instances 'fooCounts.0.3', 'fooCounts.1.3', and 'fooCounts.2.3' are duplicates and can be suppressed by the agent in a MIB walk. The following values would be returned in a full (traditional) MIB walk of fooCounts.N if T equals '6' and N equals '3': fooCounts.N.I Value ======================= fooCounts.3.1 5 fooCounts.3.3 17 fooCounts.4.1 5 fooCounts.4.3 17 fooCounts.5.1 5 fooCounts.5.3 17 fooCounts.6.1 5 Note that no instances for entry 'fooCounts.N.2' are returned, since it has not changed since time '3'. Note that all instances except 'fooCounts.5.3' and 'fooCounts.6.1' are duplicates and can be suppressed by the agent in a MIB walk. The following values would be returned in a full (traditional) MIB walk of fooCounts.N if T equals '9' and N equals '6': fooCounts.N.I Value ======================= fooCounts.6.1 5 fooCounts.6.2 9 fooCounts.7.2 9 fooCounts.8.2 9 Note that no instances for entry 'fooCounts.N.3' are returned, since it was deleted at time '7'. Note that instances 'fooCounts.6.2' and 'fooCounts.7.2'
are duplicates and can be suppressed by the agent in a MIB walk." SYNTAX TimeTicks DataSource ::= TEXTUAL-CONVENTION STATUS current DESCRIPTION "Identifies the source of the data that the associated function is configured to analyze. This source can be any interface on this device. In order to identify a particular interface, this object shall identify the instance of the ifIndex object, defined in [RFC2863], for the desired interface. For example, if an entry were to receive data from interface #1, this object would be set to ifIndex.1." SYNTAX OBJECT IDENTIFIER -- -- Protocol Directory Group -- -- Lists the inventory of protocols the probe has the capability of -- monitoring and allows the addition, deletion, and configuration of -- entries in this list. protocolDirLastChange OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime at the time the protocol directory was last modified, either through insertions or deletions, or through modifications of the protocolDirAddressMapConfig, protocolDirHostConfig, or protocolDirMatrixConfig." ::= { protocolDir 1 } protocolDirTable OBJECT-TYPE SYNTAX SEQUENCE OF ProtocolDirEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table lists the protocols that this agent has the capability to decode and count. There is one entry in this table for each such protocol. These protocols represent different network-layer, transport-layer, and higher-layer
protocols. The agent should boot up with this table preconfigured with those protocols that it knows about and wishes to monitor. Implementations are strongly encouraged to support protocols higher than the network layer (at least for the protocol distribution group), even for implementations that don't support the application-layer groups." ::= { protocolDir 2 } protocolDirEntry OBJECT-TYPE SYNTAX ProtocolDirEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A conceptual row in the protocolDirTable. An example of the indexing of this entry is protocolDirLocalIndex.8.0.0.0.1.0.0.8.0.2.0.0, which is the encoding of a length of 8, followed by 8 subids encoding the protocolDirID of 1.2048, followed by a length of 2 and the 2 subids encoding zero-valued parameters. Note that some combinations of index values may result in an index that exceeds 128 sub-identifiers in length, which exceeds the maximum for the SNMP protocol. Implementations should take care to avoid such combinations." INDEX { protocolDirID, protocolDirParameters } ::= { protocolDirTable 1 } ProtocolDirEntry ::= SEQUENCE { protocolDirID OCTET STRING, protocolDirParameters OCTET STRING, protocolDirLocalIndex Integer32, protocolDirDescr DisplayString, protocolDirType BITS, protocolDirAddressMapConfig INTEGER, protocolDirHostConfig INTEGER, protocolDirMatrixConfig INTEGER, protocolDirOwner OwnerString, protocolDirStatus RowStatus } protocolDirID OBJECT-TYPE SYNTAX OCTET STRING (SIZE (4..128)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A unique identifier for a particular protocol. Standard identifiers will be defined in such a manner that they
can often be used as specifications for new protocols - i.e., a tree-structured assignment mechanism that matches the protocol encapsulation 'tree' and that has algorithmic assignment mechanisms for certain subtrees. See RFC 2074 for more details. Despite the algorithmic mechanism, the probe will only place entries in here for those protocols it chooses to collect. In other words, it need not populate this table with all possible ethernet protocol types, nor need it create them on the fly when it sees them. Whether it does these things is a matter of product definition (cost/benefit, usability) and is up to the designer of the product. If an entry is written to this table with a protocolDirID that the agent doesn't understand, either directly or algorithmically, the SET request will be rejected with an inconsistentName or badValue (for SNMPv1) error." ::= { protocolDirEntry 1 } protocolDirParameters OBJECT-TYPE SYNTAX OCTET STRING (SIZE (1..32)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A set of parameters for the associated protocolDirID. See the associated RMON2 Protocol Identifiers document for a description of the possible parameters. There will be one octet in this string for each sub-identifier in the protocolDirID, and the parameters will appear here in the same order as the associated sub-identifiers appear in the protocolDirID. Every node in the protocolDirID tree has a different, optional set of parameters defined (that is, the definition of parameters for a node is optional). The proper parameter value for each node is included in this string. Note that the inclusion of a parameter value in this string for each node is not optional. What is optional is that a node may have no parameters defined, in which case the parameter field for that node will be zero." ::= { protocolDirEntry 2 } protocolDirLocalIndex OBJECT-TYPE SYNTAX Integer32 (1..2147483647) MAX-ACCESS read-only STATUS current DESCRIPTION
"The locally arbitrary but unique identifier associated with this protocolDir entry. The value for each supported protocol must remain constant at least from one re-initialization of the entity's network management system to the next re-initialization, except that if a protocol is deleted and re-created, it must be re-created with a new value that has not been used since the last re-initialization. The specific value is meaningful only within a given SNMP entity. A protocolDirLocalIndex must not be re-used until the next agent restart in the event that the protocol directory entry is deleted." ::= { protocolDirEntry 3 } protocolDirDescr OBJECT-TYPE SYNTAX DisplayString (SIZE (1..64)) MAX-ACCESS read-create STATUS current DESCRIPTION "A textual description of the protocol encapsulation. A probe may choose to describe only a subset of the entire encapsulation (e.g., only the highest layer). This object is intended for human consumption only. This object may not be modified if the associated protocolDirStatus object is equal to active(1)." ::= { protocolDirEntry 4 } protocolDirType OBJECT-TYPE SYNTAX BITS { extensible(0), addressRecognitionCapable(1) } MAX-ACCESS read-only STATUS current DESCRIPTION "This object describes 2 attributes of this protocol directory entry. The presence or absence of the 'extensible' bit describes whether this protocol directory entry can be extended by the user by creating protocol directory entries that are children of this protocol. An example of an entry that will often allow extensibility is
'ip.udp'. The probe may automatically populate some children of this node, such as 'ip.udp.snmp' and 'ip.udp.dns'. A probe administrator or user may also populate additional children via remote SNMP requests that create entries in this table. When a child node is added for a protocol for which the probe has no built-in support extending a parent node (for which the probe does have built-in support), that child node is not extendable. This is termed 'limited extensibility'. When a child node is added through this extensibility mechanism, the values of protocolDirLocalIndex and protocolDirType shall be assigned by the agent. The other objects in the entry will be assigned by the manager who is creating the new entry. This object also describes whether this agent can recognize addresses for this protocol, should it be a network-level protocol. That is, while a probe may be able to recognize packets of a particular network-layer protocol and count them, it takes additional logic to be able to recognize the addresses in this protocol and to populate network-layer or application-layer tables with the addresses in this protocol. If this bit is set, the agent will recognize network-layer addresses for this protocol and populate the network- and application-layer host and matrix tables with these protocols. Note that when an entry is created, the agent will supply values for the bits that match the capabilities of the agent with respect to this protocol. Note that since row creations usually exercise the limited extensibility feature, these bits will usually be set to zero." ::= { protocolDirEntry 5 } protocolDirAddressMapConfig OBJECT-TYPE SYNTAX INTEGER { notSupported(1), supportedOff(2), supportedOn(3) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object describes and configures the probe's support for address mapping for this protocol. When the probe creates entries in this table for all protocols that it understands,
it will set the entry to notSupported(1) if it doesn't have the capability to perform address mapping for the protocol or if this protocol is not a network-layer protocol. When an entry is created in this table by a management operation as part of the limited extensibility feature, the probe must set this value to notSupported(1), because limited extensibility of the protocolDirTable does not extend to interpreting addresses of the extended protocols. If the value of this object is notSupported(1), the probe will not perform address mapping for this protocol and shall not allow this object to be changed to any other value. If the value of this object is supportedOn(3), the probe supports address mapping for this protocol and is configured to perform address mapping for this protocol for all addressMappingControlEntries and all interfaces. If the value of this object is supportedOff(2), the probe supports address mapping for this protocol but is configured to not perform address mapping for this protocol for any addressMappingControlEntries and all interfaces. Whenever this value changes from supportedOn(3) to supportedOff(2), the probe shall delete all related entries in the addressMappingTable." ::= { protocolDirEntry 6 } protocolDirHostConfig OBJECT-TYPE SYNTAX INTEGER { notSupported(1), supportedOff(2), supportedOn(3) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object describes and configures the probe's support for the network-layer and application-layer host tables for this protocol. When the probe creates entries in this table for all protocols that it understands, it will set the entry to notSupported(1) if it doesn't have the capability to track the nlHostTable for this protocol or if the alHostTable is implemented but doesn't have the capability to track this protocol. Note that if the alHostTable is implemented, the probe may only support a protocol if it is supported in both the nlHostTable and the alHostTable. If the associated protocolDirType object has the addressRecognitionCapable bit set, then this is a network- layer protocol for which the probe recognizes addresses, and
thus the probe will populate the nlHostTable and alHostTable with addresses it discovers for this protocol. If the value of this object is notSupported(1), the probe will not track the nlHostTable or alHostTable for this protocol and shall not allow this object to be changed to any other value. If the value of this object is supportedOn(3), the probe supports tracking of the nlHostTable and alHostTable for this protocol and is configured to track both tables for this protocol for all control entries and all interfaces. If the value of this object is supportedOff(2), the probe supports tracking of the nlHostTable and alHostTable for this protocol but is configured to not track these tables for any control entries or interfaces. Whenever this value changes from supportedOn(3) to supportedOff(2), the probe shall delete all related entries in the nlHostTable and alHostTable. Note that since each alHostEntry references 2 protocol directory entries, one for the network address and one for the type of the highest protocol recognized, an entry will only be created in that table if this value is supportedOn(3) for both protocols." ::= { protocolDirEntry 7 } protocolDirMatrixConfig OBJECT-TYPE SYNTAX INTEGER { notSupported(1), supportedOff(2), supportedOn(3) } MAX-ACCESS read-create STATUS current DESCRIPTION "This object describes and configures the probe's support for the network-layer and application-layer matrix tables for this protocol. When the probe creates entries in this table for all protocols that it understands, it will set the entry to notSupported(1) if it doesn't have the capability to track the nlMatrixTables for this protocol or if the alMatrixTables are implemented but don't have the capability to track this protocol. Note that if the alMatrix tables are implemented, the probe may only support a protocol if it is supported in both of the nlMatrixTables and both of the alMatrixTables. If the associated protocolDirType object has the addressRecognitionCapable bit set, then this is a network-
layer protocol for which the probe recognizes addresses, and thus the probe will populate both of the nlMatrixTables and both of the alMatrixTables with addresses it discovers for this protocol. If the value of this object is notSupported(1), the probe will not track either of the nlMatrixTables or the alMatrixTables for this protocol and shall not allow this object to be changed to any other value. If the value of this object is supportedOn(3), the probe supports tracking of both of the nlMatrixTables and (if implemented) both of the alMatrixTables for this protocol and is configured to track these tables for this protocol for all control entries and all interfaces. If the value of this object is supportedOff(2), the probe supports tracking of both of the nlMatrixTables and (if implemented) both of the alMatrixTables for this protocol but is configured to not track these tables for this protocol for any control entries or interfaces. Whenever this value changes from supportedOn(3) to supportedOff(2), the probe shall delete all related entries in the nlMatrixTables and the alMatrixTables. Note that since each alMatrixEntry references 2 protocol directory entries, one for the network address and one for the type of the highest protocol recognized, an entry will only be created in that table if this value is supportedOn(3) for both protocols." ::= { protocolDirEntry 8 } protocolDirOwner OBJECT-TYPE SYNTAX OwnerString MAX-ACCESS read-create STATUS current DESCRIPTION "The entity that configured this entry and is therefore using the resources assigned to it." ::= { protocolDirEntry 9 } protocolDirStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this protocol directory entry. An entry may not exist in the active state unless all objects in the entry have an appropriate value.
If this object is not equal to active(1), all associated entries in the nlHostTable, nlMatrixSDTable, nlMatrixDSTable, alHostTable, alMatrixSDTable, and alMatrixDSTable shall be deleted." ::= { protocolDirEntry 10 } -- -- Protocol Distribution Group (protocolDist) -- -- Collects the relative amounts of octets and packets for the -- different protocols detected on a network segment. -- protocolDistControlTable, -- protocolDistStatsTable protocolDistControlTable OBJECT-TYPE SYNTAX SEQUENCE OF ProtocolDistControlEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Controls the setup of protocol type distribution statistics tables. Implementations are encouraged to add an entry per monitored interface upon initialization so that a default collection of protocol statistics is available. Rationale: This table controls collection of very basic statistics for any or all of the protocols detected on a given interface. An NMS can use this table to quickly determine bandwidth allocation utilized by different protocols. A media-specific statistics collection could also be configured (e.g., etherStats, trPStats) to easily obtain total frame, octet, and droppedEvents for the same interface." ::= { protocolDist 1 } protocolDistControlEntry OBJECT-TYPE SYNTAX ProtocolDistControlEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A conceptual row in the protocolDistControlTable. An example of the indexing of this entry is protocolDistControlDroppedFrames.7" INDEX { protocolDistControlIndex }
::= { protocolDistControlTable 1 } ProtocolDistControlEntry ::= SEQUENCE { protocolDistControlIndex Integer32, protocolDistControlDataSource DataSource, protocolDistControlDroppedFrames Counter32, protocolDistControlCreateTime LastCreateTime, protocolDistControlOwner OwnerString, protocolDistControlStatus RowStatus } protocolDistControlIndex OBJECT-TYPE SYNTAX Integer32 (1..65535) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A unique index for this protocolDistControlEntry." ::= { protocolDistControlEntry 1 } protocolDistControlDataSource OBJECT-TYPE SYNTAX DataSource MAX-ACCESS read-create STATUS current DESCRIPTION "The source of data for the this protocol distribution. The statistics in this group reflect all packets on the local network segment attached to the identified interface. This object may not be modified if the associated protocolDistControlStatus object is equal to active(1)." ::= { protocolDistControlEntry 2 } protocolDistControlDroppedFrames OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of frames that were received by the probe and therefore not accounted for in the *StatsDropEvents, but that the probe chose not to count for this entry for whatever reason. Most often, this event occurs when the probe is out of some resources and decides to shed load from this collection. This count does not include packets that were not counted because they had MAC-layer errors.
Note that, unlike the dropEvents counter, this number is the exact number of frames dropped." ::= { protocolDistControlEntry 3 } protocolDistControlCreateTime OBJECT-TYPE SYNTAX LastCreateTime MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime when this control entry was last activated. This can be used by the management station to ensure that the table has not been deleted and recreated between polls." ::= { protocolDistControlEntry 4 } protocolDistControlOwner OBJECT-TYPE SYNTAX OwnerString MAX-ACCESS read-create STATUS current DESCRIPTION "The entity that configured this entry and is therefore using the resources assigned to it." ::= { protocolDistControlEntry 5 } protocolDistControlStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this row. An entry may not exist in the active state unless all objects in the entry have an appropriate value. If this object is not equal to active(1), all associated entries in the protocolDistStatsTable shall be deleted." ::= { protocolDistControlEntry 6 } -- per interface protocol distribution statistics table protocolDistStatsTable OBJECT-TYPE SYNTAX SEQUENCE OF ProtocolDistStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "An entry is made in this table for every protocol in the protocolDirTable that has been seen in at least one packet. Counters are updated in this table for every protocol type that is encountered when parsing a packet, but no counters are
updated for packets with MAC-layer errors. Note that if a protocolDirEntry is deleted, all associated entries in this table are removed." ::= { protocolDist 2 } protocolDistStatsEntry OBJECT-TYPE SYNTAX ProtocolDistStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A conceptual row in the protocolDistStatsTable. The index is composed of the protocolDistControlIndex of the associated protocolDistControlEntry, followed by the protocolDirLocalIndex of the associated protocol that this entry represents. In other words, the index identifies the protocol distribution an entry is a part of and the particular protocol that it represents. An example of the indexing of this entry is protocolDistStatsPkts.1.18" INDEX { protocolDistControlIndex, protocolDirLocalIndex } ::= { protocolDistStatsTable 1 } ProtocolDistStatsEntry ::= SEQUENCE { protocolDistStatsPkts ZeroBasedCounter32, protocolDistStatsOctets ZeroBasedCounter32 } protocolDistStatsPkts OBJECT-TYPE SYNTAX ZeroBasedCounter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets of this protocol type received without errors. Note that this is the number of link-layer packets, so if a single network-layer packet is fragmented into several link-layer frames, this counter is incremented several times." ::= { protocolDistStatsEntry 1 } protocolDistStatsOctets OBJECT-TYPE SYNTAX ZeroBasedCounter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of octets in packets of this protocol type
received since it was added to the protocolDistStatsTable (excluding framing bits, but including FCS octets), except for those octets in packets that contained errors. Note that this doesn't count just those octets in the particular protocol frames but includes the entire packet that contained the protocol." ::= { protocolDistStatsEntry 2 } -- -- Address Map Group (addressMap) -- -- Lists MAC address to network address bindings discovered by the -- probe and what interface they were last seen on. -- addressMapControlTable -- addressMapTable addressMapInserts OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of times an address mapping entry has been inserted into the addressMapTable. If an entry is inserted, then deleted, and then inserted, this counter will be incremented by 2. Note that the table size can be determined by subtracting addressMapDeletes from addressMapInserts." ::= { addressMap 1 } addressMapDeletes OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of times an address mapping entry has been deleted from the addressMapTable (for any reason). If an entry is deleted, then inserted, and then deleted, this counter will be incremented by 2. Note that the table size can be determined by subtracting addressMapDeletes from addressMapInserts." ::= { addressMap 2 } addressMapMaxDesiredEntries OBJECT-TYPE SYNTAX Integer32 (-1..2147483647) MAX-ACCESS read-write
STATUS current DESCRIPTION "The maximum number of entries that are desired in the addressMapTable. The probe will not create more than this number of entries in the table but may choose to create fewer entries in this table for any reason, including the lack of resources. If this object is set to a value less than the current number of entries, enough entries are chosen in an implementation-dependent manner and deleted so that the number of entries in the table equals the value of this object. If this value is set to -1, the probe may create any number of entries in this table. This object may be used to control how resources are allocated on the probe for the various RMON functions." ::= { addressMap 3 } addressMapControlTable OBJECT-TYPE SYNTAX SEQUENCE OF AddressMapControlEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A table to control the collection of mappings from network layer address to physical address to interface. Note that this is not like the typical RMON controlTable and dataTable in which each entry creates its own data table. Each entry in this table enables the discovery of addresses on a new interface and the placement of address mappings into the central addressMapTable. Implementations are encouraged to add an entry per monitored interface upon initialization so that a default collection of address mappings is available." ::= { addressMap 4 } addressMapControlEntry OBJECT-TYPE SYNTAX AddressMapControlEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A conceptual row in the addressMapControlTable. An example of the indexing of this entry is addressMapControlDroppedFrames.1"
INDEX { addressMapControlIndex } ::= { addressMapControlTable 1 } AddressMapControlEntry ::= SEQUENCE { addressMapControlIndex Integer32, addressMapControlDataSource DataSource, addressMapControlDroppedFrames Counter32, addressMapControlOwner OwnerString, addressMapControlStatus RowStatus } addressMapControlIndex OBJECT-TYPE SYNTAX Integer32 (1..65535) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A unique index for this entry in the addressMapControlTable." ::= { addressMapControlEntry 1 } addressMapControlDataSource OBJECT-TYPE SYNTAX DataSource MAX-ACCESS read-create STATUS current DESCRIPTION "The source of data for this addressMapControlEntry." ::= { addressMapControlEntry 2 } addressMapControlDroppedFrames OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of frames that were received by the probe and therefore not accounted for in the *StatsDropEvents, but that the probe chose not to count for this entry for whatever reason. Most often, this event occurs when the probe is out of some resources and decides to shed load from this collection. This count does not include packets that were not counted because they had MAC-layer errors. Note that, unlike the dropEvents counter, this number is the exact number of frames dropped." ::= { addressMapControlEntry 3 } addressMapControlOwner OBJECT-TYPE SYNTAX OwnerString
MAX-ACCESS read-create STATUS current DESCRIPTION "The entity that configured this entry and is therefore using the resources assigned to it." ::= { addressMapControlEntry 4 } addressMapControlStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this addressMap control entry. An entry may not exist in the active state unless all objects in the entry have an appropriate value. If this object is not equal to active(1), all associated entries in the addressMapTable shall be deleted." ::= { addressMapControlEntry 5 } addressMapTable OBJECT-TYPE SYNTAX SEQUENCE OF AddressMapEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A table of mappings from network layer address to physical address to interface. The probe will add entries to this table based on the source MAC and network addresses seen in packets without MAC-level errors. The probe will populate this table for all protocols in the protocol directory table whose value of protocolDirAddressMapConfig is equal to supportedOn(3), and will delete any entries whose protocolDirEntry is deleted or has a protocolDirAddressMapConfig value of supportedOff(2)." ::= { addressMap 5 } addressMapEntry OBJECT-TYPE SYNTAX AddressMapEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A conceptual row in the addressMapTable. The protocolDirLocalIndex in the index identifies the network layer protocol of the addressMapNetworkAddress.
An example of the indexing of this entry is addressMapSource.783495.18.4.128.2.6.6.11.1.3.6.1.2.1.2.2.1.1.1. Note that some combinations of index values may result in an index that exceeds 128 sub-identifiers in length, which exceeds the maximum for the SNMP protocol. Implementations should take care to avoid such combinations." INDEX { addressMapTimeMark, protocolDirLocalIndex, addressMapNetworkAddress, addressMapSource } ::= { addressMapTable 1 } AddressMapEntry ::= SEQUENCE { addressMapTimeMark TimeFilter, addressMapNetworkAddress OCTET STRING, addressMapSource OBJECT IDENTIFIER, addressMapPhysicalAddress OCTET STRING, addressMapLastChange TimeStamp } addressMapTimeMark OBJECT-TYPE SYNTAX TimeFilter MAX-ACCESS not-accessible STATUS current DESCRIPTION "A TimeFilter for this entry. See the TimeFilter textual convention to see how this works." ::= { addressMapEntry 1 } addressMapNetworkAddress OBJECT-TYPE SYNTAX OCTET STRING (SIZE (1..255)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The network address for this relation. This is represented as an octet string with specific semantics and length as identified by the protocolDirLocalIndex component of the index. For example, if the protocolDirLocalIndex indicates an encapsulation of ip, this object is encoded as a length octet of 4, followed by the 4 octets of the IP address, in network byte order." ::= { addressMapEntry 2 } addressMapSource OBJECT-TYPE SYNTAX OBJECT IDENTIFIER
MAX-ACCESS not-accessible STATUS current DESCRIPTION "The interface or port on which the associated network address was most recently seen. If this address mapping was discovered on an interface, this object shall identify the instance of the ifIndex object, defined in [RFC2863], for the desired interface. For example, if an entry were to receive data from interface #1, this object would be set to ifIndex.1. If this address mapping was discovered on a port, this object shall identify the instance of the rptrGroupPortIndex object, defined in [RFC2108], for the desired port. For example, if an entry were to receive data from group #1, port #1, this object would be set to rptrGroupPortIndex.1.1. Note that while the dataSource associated with this entry may only point to index objects, this object may at times point to repeater port objects. This situation occurs when the dataSource points to an interface that is a locally attached repeater and the agent has additional information about the source port of traffic seen on that repeater." ::= { addressMapEntry 3 } addressMapPhysicalAddress OBJECT-TYPE SYNTAX OCTET STRING MAX-ACCESS read-only STATUS current DESCRIPTION "The last source physical address on which the associated network address was seen. If the protocol of the associated network address was encapsulated inside of a network-level or higher protocol, this will be the address of the next-lower protocol with the addressRecognitionCapable bit enabled and will be formatted as specified for that protocol." ::= { addressMapEntry 4 } addressMapLastChange OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime at the time this entry was last created or the values of the physical address changed.
This can be used to help detect duplicate address problems, in which case this object will be updated frequently." ::= { addressMapEntry 5 } -- -- Network Layer Host Group -- -- Counts the amount of traffic sent from and to each network address -- discovered by the probe. -- Note that while the hlHostControlTable also has objects that -- control an optional alHostTable, implementation of the alHostTable is -- not required to fully implement this group. hlHostControlTable OBJECT-TYPE SYNTAX SEQUENCE OF HlHostControlEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A list of higher-layer (i.e., non-MAC) host table control entries. These entries will enable the collection of the network- and application-level host tables indexed by network addresses. Both the network- and application-level host tables are controlled by this table so that they will both be created and deleted at the same time, further increasing the ease with which they can be implemented as a single datastore. (Note that if an implementation stores application-layer host records in memory, it can derive network-layer host records from them.) Entries in the nlHostTable will be created on behalf of each entry in this table. Additionally, if this probe implements the alHostTable, entries in the alHostTable will be created on behalf of each entry in this table. Implementations are encouraged to add an entry per monitored interface upon initialization so that a default collection of host statistics is available." ::= { nlHost 1 } hlHostControlEntry OBJECT-TYPE SYNTAX HlHostControlEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A conceptual row in the hlHostControlTable. An example of the indexing of this entry is
hlHostControlNlDroppedFrames.1" INDEX { hlHostControlIndex } ::= { hlHostControlTable 1 } HlHostControlEntry ::= SEQUENCE { hlHostControlIndex Integer32, hlHostControlDataSource DataSource, hlHostControlNlDroppedFrames Counter32, hlHostControlNlInserts Counter32, hlHostControlNlDeletes Counter32, hlHostControlNlMaxDesiredEntries Integer32, hlHostControlAlDroppedFrames Counter32, hlHostControlAlInserts Counter32, hlHostControlAlDeletes Counter32, hlHostControlAlMaxDesiredEntries Integer32, hlHostControlOwner OwnerString, hlHostControlStatus RowStatus } hlHostControlIndex OBJECT-TYPE SYNTAX Integer32 (1..65535) MAX-ACCESS not-accessible STATUS current DESCRIPTION "An index that uniquely identifies an entry in the hlHostControlTable. Each such entry defines a function that discovers hosts on a particular interface and places statistics about them in the nlHostTable, and optionally in the alHostTable, on behalf of this hlHostControlEntry." ::= { hlHostControlEntry 1 } hlHostControlDataSource OBJECT-TYPE SYNTAX DataSource MAX-ACCESS read-create STATUS current DESCRIPTION "The source of data for the associated host tables. The statistics in this group reflect all packets on the local network segment attached to the identified interface. This object may not be modified if the associated hlHostControlStatus object is equal to active(1)." ::= { hlHostControlEntry 2 } hlHostControlNlDroppedFrames OBJECT-TYPE
SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of frames that were received by the probe and therefore not accounted for in the *StatsDropEvents, but that the probe chose not to count for the associated nlHost entries for whatever reason. Most often, this event occurs when the probe is out of some resources and decides to shed load from this collection. This count does not include packets that were not counted because they had MAC-layer errors. Note that if the nlHostTable is inactive because no protocols are enabled in the protocol directory, this value should be 0. Note that, unlike the dropEvents counter, this number is the exact number of frames dropped." ::= { hlHostControlEntry 3 } hlHostControlNlInserts OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of times an nlHost entry has been inserted into the nlHost table. If an entry is inserted, then deleted, and then inserted, this counter will be incremented by 2. To allow for efficient implementation strategies, agents may delay updating this object for short periods of time. For example, an implementation strategy may allow internal data structures to differ from those visible via SNMP for short periods of time. This counter may reflect the internal data structures for those short periods of time. Note that the table size can be determined by subtracting hlHostControlNlDeletes from hlHostControlNlInserts." ::= { hlHostControlEntry 4 } hlHostControlNlDeletes OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of times an nlHost entry has been
deleted from the nlHost table (for any reason). If an entry is deleted, then inserted, and then deleted, this counter will be incremented by 2. To allow for efficient implementation strategies, agents may delay updating this object for short periods of time. For example, an implementation strategy may allow internal data structures to differ from those visible via SNMP for short periods of time. This counter may reflect the internal data structures for those short periods of time. Note that the table size can be determined by subtracting hlHostControlNlDeletes from hlHostControlNlInserts." ::= { hlHostControlEntry 5 } hlHostControlNlMaxDesiredEntries OBJECT-TYPE SYNTAX Integer32 (-1..2147483647) MAX-ACCESS read-create STATUS current DESCRIPTION "The maximum number of entries that are desired in the nlHostTable on behalf of this control entry. The probe will not create more than this number of associated entries in the table but may choose to create fewer entries in this table for any reason, including the lack of resources. If this object is set to a value less than the current number of entries, enough entries are chosen in an implementation-dependent manner and deleted so that the number of entries in the table equals the value of this object. If this value is set to -1, the probe may create any number of entries in this table. If the associated hlHostControlStatus object is equal to 'active', this object may not be modified. This object may be used to control how resources are allocated on the probe for the various RMON functions." ::= { hlHostControlEntry 6 } hlHostControlAlDroppedFrames OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of frames that were received by the probe and therefore not accounted for in the *StatsDropEvents, but that the probe chose not to count for the associated
alHost entries for whatever reason. Most often, this event occurs when the probe is out of some resources and decides to shed load from this collection. This count does not include packets that were not counted because they had MAC-layer errors. Note that if the alHostTable is not implemented or is inactive because no protocols are enabled in the protocol directory, this value should be 0. Note that, unlike the dropEvents counter, this number is the exact number of frames dropped." ::= { hlHostControlEntry 7 } hlHostControlAlInserts OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of times an alHost entry has been inserted into the alHost table. If an entry is inserted, then deleted, and then inserted, this counter will be incremented by 2. To allow for efficient implementation strategies, agents may delay updating this object for short periods of time. For example, an implementation strategy may allow internal data structures to differ from those visible via SNMP for short periods of time. This counter may reflect the internal data structures for those short periods of time. Note that the table size can be determined by subtracting hlHostControlAlDeletes from hlHostControlAlInserts." ::= { hlHostControlEntry 8 } hlHostControlAlDeletes OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of times an alHost entry has been deleted from the alHost table (for any reason). If an entry is deleted, then inserted, and then deleted, this counter will be incremented by 2. To allow for efficient implementation strategies, agents may delay updating this object for short periods of time. For
example, an implementation strategy may allow internal data structures to differ from those visible via SNMP for short periods of time. This counter may reflect the internal data structures for those short periods of time. Note that the table size can be determined by subtracting hlHostControlAlDeletes from hlHostControlAlInserts." ::= { hlHostControlEntry 9 } hlHostControlAlMaxDesiredEntries OBJECT-TYPE SYNTAX Integer32 (-1..2147483647) MAX-ACCESS read-create STATUS current DESCRIPTION "The maximum number of entries that are desired in the alHost table on behalf of this control entry. The probe will not create more than this number of associated entries in the table but may choose to create fewer entries in this table for any reason, including the lack of resources. If this object is set to a value less than the current number of entries, enough entries are chosen in an implementation-dependent manner and deleted so that the number of entries in the table equals the value of this object. If this value is set to -1, the probe may create any number of entries in this table. If the associated hlHostControlStatus object is equal to 'active', this object may not be modified. This object may be used to control how resources are allocated on the probe for the various RMON functions." ::= { hlHostControlEntry 10 } hlHostControlOwner OBJECT-TYPE SYNTAX OwnerString MAX-ACCESS read-create STATUS current DESCRIPTION "The entity that configured this entry and is therefore using the resources assigned to it." ::= { hlHostControlEntry 11 } hlHostControlStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION
"The status of this hlHostControlEntry. An entry may not exist in the active state unless all objects in the entry have an appropriate value. If this object is not equal to active(1), all associated entries in the nlHostTable and alHostTable shall be deleted." ::= { hlHostControlEntry 12 } nlHostTable OBJECT-TYPE SYNTAX SEQUENCE OF NlHostEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A collection of statistics for a particular network layer address that has been discovered on an interface of this device. The probe will populate this table for all network layer protocols in the protocol directory table whose value of protocolDirHostConfig is equal to supportedOn(3), and will delete any entries whose protocolDirEntry is deleted or has a protocolDirHostConfig value of supportedOff(2). The probe will add to this table all addresses seen as the source or destination address in all packets with no MAC errors, and will increment octet and packet counts in the table for all packets with no MAC errors." ::= { nlHost 2 } nlHostEntry OBJECT-TYPE SYNTAX NlHostEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A conceptual row in the nlHostTable. The hlHostControlIndex value in the index identifies the hlHostControlEntry on whose behalf this entry was created. The protocolDirLocalIndex value in the index identifies the network layer protocol of the nlHostAddress. An example of the indexing of this entry is nlHostOutPkts.1.783495.18.4.128.2.6.6. Note that some combinations of index values may result in an index that exceeds 128 sub-identifiers in length, which exceeds the maximum for the SNMP protocol. Implementations should take
care to avoid such combinations." INDEX { hlHostControlIndex, nlHostTimeMark, protocolDirLocalIndex, nlHostAddress } ::= { nlHostTable 1 } NlHostEntry ::= SEQUENCE { nlHostTimeMark TimeFilter, nlHostAddress OCTET STRING, nlHostInPkts ZeroBasedCounter32, nlHostOutPkts ZeroBasedCounter32, nlHostInOctets ZeroBasedCounter32, nlHostOutOctets ZeroBasedCounter32, nlHostOutMacNonUnicastPkts ZeroBasedCounter32, nlHostCreateTime LastCreateTime } nlHostTimeMark OBJECT-TYPE SYNTAX TimeFilter MAX-ACCESS not-accessible STATUS current DESCRIPTION "A TimeFilter for this entry. See the TimeFilter textual convention to see how this works." ::= { nlHostEntry 1 } nlHostAddress OBJECT-TYPE SYNTAX OCTET STRING (SIZE (1..255)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The network address for this nlHostEntry. This is represented as an octet string with specific semantics and length as identified by the protocolDirLocalIndex component of the index. For example, if the protocolDirLocalIndex indicates an encapsulation of IP, this object is encoded as a length octet of 4, followed by the 4 octets of the IP address, in network byte order." ::= { nlHostEntry 2 } nlHostInPkts OBJECT-TYPE SYNTAX ZeroBasedCounter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets without errors transmitted to
this address since it was added to the nlHostTable. Note that this is the number of link-layer packets, so if a single network-layer packet is fragmented into several link-layer frames, this counter is incremented several times." ::= { nlHostEntry 3 } nlHostOutPkts OBJECT-TYPE SYNTAX ZeroBasedCounter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of packets without errors transmitted by this address since it was added to the nlHostTable. Note that this is the number of link-layer packets, so if a single network-layer packet is fragmented into several link-layer frames, this counter is incremented several times." ::= { nlHostEntry 4 } nlHostInOctets OBJECT-TYPE SYNTAX ZeroBasedCounter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of octets transmitted to this address since it was added to the nlHostTable (excluding framing bits, but including FCS octets), excluding octets in packets that contained errors. Note that this doesn't count just those octets in the particular protocol frames but includes the entire packet that contained the protocol." ::= { nlHostEntry 5 } nlHostOutOctets OBJECT-TYPE SYNTAX ZeroBasedCounter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of octets transmitted by this address since it was added to the nlHostTable (excluding framing bits, but including FCS octets), excluding octets in packets that contained errors. Note that this doesn't count just those octets in the particular protocol frames but includes the entire packet that contained the protocol." ::= { nlHostEntry 6 }