RFC 2233
The Interfaces Group MIB using SMIv2
6. Interfaces Group Definitions IF-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, Counter32, Gauge32, Counter64, Integer32, TimeTicks, mib-2, NOTIFICATION-TYPE FROM SNMPv2-SMI TEXTUAL-CONVENTION, DisplayString, PhysAddress, TruthValue, RowStatus, TimeStamp, AutonomousType, TestAndIncr FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF snmpTraps FROM SNMPv2-MIB IANAifType FROM IANAifType-MIB;
ifMIB MODULE-IDENTITY
LAST-UPDATED "9611031355Z"
ORGANIZATION "IETF Interfaces MIB Working Group"
CONTACT-INFO
" Keith McCloghrie
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
US
408-526-5260
kzm@cisco.com"
DESCRIPTION
"The MIB module to describe generic objects for
network interface sub-layers. This MIB is an updated
version of MIB-II's ifTable, and incorporates the
extensions defined in RFC 1229."
REVISION "9602282155Z"
DESCRIPTION
"Revisions made by the Interfaces MIB WG."
REVISION "9311082155Z"
DESCRIPTION
"Initial revision, published as part of RFC 1573."
::= { mib-2 31 }
ifMIBObjects OBJECT IDENTIFIER ::= { ifMIB 1 }
interfaces OBJECT IDENTIFIER ::= { mib-2 2 }
OwnerString ::= TEXTUAL-CONVENTION
DISPLAY-HINT "255a"
STATUS current
DESCRIPTION
"This data type is used to model an administratively
assigned name of the owner of a resource. This
information is taken from the NVT ASCII character set.
It is suggested that this name contain one or more of
the following: ASCII form of the manager station's
transport address, management station name (e.g.,
domain name), network management personnel's name,
location, or phone number. In some cases the agent
itself will be the owner of an entry. In these cases,
this string shall be set to a string starting with
'agent'."
SYNTAX OCTET STRING (SIZE(0..255))
-- InterfaceIndex contains the semantics of ifIndex and
-- should be used for any objects defined on other mib
-- modules that need these semantics.
InterfaceIndex ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"A unique value, greater than zero, for each interface
or interface sub-layer in the managed system. It is
recommended that values are assigned contiguously
starting from 1. The value for each interface sub-
layer must remain constant at least from one re-
initialization of the entity's network management
system to the next re-initialization."
SYNTAX Integer32 (1..2147483647)
InterfaceIndexOrZero ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d"
STATUS current
DESCRIPTION
"This textual convention is an extension of the
InterfaceIndex convention. The latter defines a
greater than zero value used to identify an interface
or interface sub-layer in the managed system. This
extension permits the additional value of zero. the
value zero is object-specific and must therefore be
defined as part of the description of any object which
uses this syntax. Examples of the usage of zero might
include situations where interface was unknown, or
when none or all interfaces need to be referenced."
SYNTAX Integer32 (0..2147483647)
ifNumber OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of network interfaces (regardless of their
current state) present on this system."
::= { interfaces 1 }
ifTableLastChange OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time of the last
creation or deletion of an entry in the ifTable. If
the number of entries has been unchanged since the
last re-initialization of the local network management
subsystem, then this object contains a zero value."
::= { ifMIBObjects 5 }
-- the Interfaces table
-- The Interfaces table contains information on the entity's
-- interfaces. Each sub-layer below the internetwork-layer
-- of a network interface is considered to be an interface.
ifTable OBJECT-TYPE
SYNTAX SEQUENCE OF IfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A list of interface entries. The number of entries
is given by the value of ifNumber."
::= { interfaces 2 }
ifEntry OBJECT-TYPE
SYNTAX IfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing management information applicable
to a particular interface."
INDEX { ifIndex }
::= { ifTable 1 }
IfEntry ::=
SEQUENCE {
ifIndex InterfaceIndex,
ifDescr DisplayString,
ifType IANAifType,
ifMtu Integer32,
ifSpeed Gauge32,
ifPhysAddress PhysAddress,
ifAdminStatus INTEGER,
ifOperStatus INTEGER,
ifLastChange TimeTicks,
ifInOctets Counter32,
ifInUcastPkts Counter32,
ifInNUcastPkts Counter32, -- deprecated
ifInDiscards Counter32,
ifInErrors Counter32,
ifInUnknownProtos Counter32,
ifOutOctets Counter32,
ifOutUcastPkts Counter32,
ifOutNUcastPkts Counter32, -- deprecated
ifOutDiscards Counter32,
ifOutErrors Counter32,
ifOutQLen Gauge32, -- deprecated
ifSpecific OBJECT IDENTIFIER -- deprecated
}
ifIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A unique value, greater than zero, for each
interface. It is recommended that values are assigned
contiguously starting from 1. The value for each
interface sub-layer must remain constant at least from
one re-initialization of the entity's network
management system to the next re-initialization."
::= { ifEntry 1 }
ifDescr OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A textual string containing information about the
interface. This string should include the name of the
manufacturer, the product name and the version of the
interface hardware/software."
::= { ifEntry 2 }
ifType OBJECT-TYPE
SYNTAX IANAifType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of interface. Additional values for ifType
are assigned by the Internet Assigned Numbers
Authority (IANA), through updating the syntax of the
IANAifType textual convention."
::= { ifEntry 3 }
ifMtu OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The size of the largest packet which can be
sent/received on the interface, specified in octets.
For interfaces that are used for transmitting network
datagrams, this is the size of the largest network
datagram that can be sent on the interface."
::= { ifEntry 4 }
ifSpeed OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"An estimate of the interface's current bandwidth in
bits per second. For interfaces which do not vary in
bandwidth or for those where no accurate estimation
can be made, this object should contain the nominal
bandwidth. If the bandwidth of the interface is
greater than the maximum value reportable by this
object then this object should report its maximum
value (4,294,967,295) and ifHighSpeed must be used to
report the interace's speed. For a sub-layer which
has no concept of bandwidth, this object should be
zero."
::= { ifEntry 5 }
ifPhysAddress OBJECT-TYPE
SYNTAX PhysAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The interface's address at its protocol sub-layer.
For example, for an 802.x interface, this object
normally contains a MAC address. The interface's
media-specific MIB must define the bit and byte
ordering and the format of the value of this object.
For interfaces which do not have such an address
(e.g., a serial line), this object should contain an
octet string of zero length."
::= { ifEntry 6 }
ifAdminStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1), -- ready to pass packets
down(2),
testing(3) -- in some test mode
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The desired state of the interface. The testing(3)
state indicates that no operational packets can be
passed. When a managed system initializes, all
interfaces start with ifAdminStatus in the down(2)
state. As a result of either explicit management
action or per configuration information retained by
the managed system, ifAdminStatus is then changed to
either the up(1) or testing(3) states (or remains in
the down(2) state)."
::= { ifEntry 7 }
ifOperStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1), -- ready to pass packets
down(2),
testing(3), -- in some test mode
unknown(4), -- status can not be determined
-- for some reason.
dormant(5),
notPresent(6), -- some component is missing
lowerLayerDown(7) -- down due to state of
-- lower-layer interface(s)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The current operational state of the interface. The
testing(3) state indicates that no operational packets
can be passed. If ifAdminStatus is down(2) then
ifOperStatus should be down(2). If ifAdminStatus is
changed to up(1) then ifOperStatus should change to
up(1) if the interface is ready to transmit and
receive network traffic; it should change to
dormant(5) if the interface is waiting for external
actions (such as a serial line waiting for an incoming
connection); it should remain in the down(2) state if
and only if there is a fault that prevents it from
going to the up(1) state; it should remain in the
notPresent(6) state if the interface has missing
(typically, hardware) components."
::= { ifEntry 8 }
ifLastChange OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time the interface
entered its current operational state. If the current
state was entered prior to the last re-initialization
of the local network management subsystem, then this
object contains a zero value."
::= { ifEntry 9 }
ifInOctets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of octets received on the interface,
including framing characters.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 10 }
ifInUcastPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets, delivered by this sub-layer to
a higher (sub-)layer, which were not addressed to a
multicast or broadcast address at this sub-layer.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 11 }
ifInNUcastPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of packets, delivered by this sub-layer to
a higher (sub-)layer, which were addressed to a
multicast or broadcast address at this sub-layer.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime.
This object is deprecated in favour of
ifInMulticastPkts and ifInBroadcastPkts."
::= { ifEntry 12 }
ifInDiscards OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of inbound packets which were chosen to be
discarded even though no errors had been detected to
prevent their being deliverable to a higher-layer
protocol. One possible reason for discarding such a
packet could be to free up buffer space.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 13 }
ifInErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"For packet-oriented interfaces, the number of inbound
packets that contained errors preventing them from
being deliverable to a higher-layer protocol. For
character-oriented or fixed-length interfaces, the
number of inbound transmission units that contained
errors preventing them from being deliverable to a
higher-layer protocol.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 14 }
ifInUnknownProtos OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"For packet-oriented interfaces, the number of packets
received via the interface which were discarded
because of an unknown or unsupported protocol. For
character-oriented or fixed-length interfaces that
support protocol multiplexing the number of
transmission units received via the interface which
were discarded because of an unknown or unsupported
protocol. For any interface that does not support
protocol multiplexing, this counter will always be 0.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 15 }
ifOutOctets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of octets transmitted out of the
interface, including framing characters.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 16 }
ifOutUcastPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of packets that higher-level
protocols requested be transmitted, and which were not
addressed to a multicast or broadcast address at this
sub-layer, including those that were discarded or not
sent.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 17 }
ifOutNUcastPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The total number of packets that higher-level
protocols requested be transmitted, and which were
addressed to a multicast or broadcast address at this
sub-layer, including those that were discarded or not
sent.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime.
This object is deprecated in favour of
ifOutMulticastPkts and ifOutBroadcastPkts."
::= { ifEntry 18 }
ifOutDiscards OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of outbound packets which were chosen to
be discarded even though no errors had been detected
to prevent their being transmitted. One possible
reason for discarding such a packet could be to free
up buffer space.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 19 }
ifOutErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"For packet-oriented interfaces, the number of
outbound packets that could not be transmitted because
of errors. For character-oriented or fixed-length
interfaces, the number of outbound transmission units
that could not be transmitted because of errors.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifEntry 20 }
ifOutQLen OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The length of the output packet queue (in packets)."
::= { ifEntry 21 }
ifSpecific OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"A reference to MIB definitions specific to the
particular media being used to realize the interface.
It is recommended that this value point to an instance
of a MIB object in the media-specific MIB, i.e., that
this object have the semantics associated with the
InstancePointer textual convention defined in RFC
1903. In fact, it is recommended that the media-
specific MIB specify what value ifSpecific should/can
take for values of ifType. If no MIB definitions
specific to the particular media are available, the
value should be set to the OBJECT IDENTIFIER { 0 0 }."
::= { ifEntry 22 }
--
-- Extension to the interface table
--
-- This table replaces the ifExtnsTable table.
--
ifXTable OBJECT-TYPE
SYNTAX SEQUENCE OF IfXEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A list of interface entries. The number of entries
is given by the value of ifNumber. This table
contains additional objects for the interface table."
::= { ifMIBObjects 1 }
ifXEntry OBJECT-TYPE
SYNTAX IfXEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing additional management information
applicable to a particular interface."
AUGMENTS { ifEntry }
::= { ifXTable 1 }
IfXEntry ::=
SEQUENCE {
ifName DisplayString,
ifInMulticastPkts Counter32,
ifInBroadcastPkts Counter32,
ifOutMulticastPkts Counter32,
ifOutBroadcastPkts Counter32,
ifHCInOctets Counter64,
ifHCInUcastPkts Counter64,
ifHCInMulticastPkts Counter64,
ifHCInBroadcastPkts Counter64,
ifHCOutOctets Counter64,
ifHCOutUcastPkts Counter64,
ifHCOutMulticastPkts Counter64,
ifHCOutBroadcastPkts Counter64,
ifLinkUpDownTrapEnable INTEGER,
ifHighSpeed Gauge32,
ifPromiscuousMode TruthValue,
ifConnectorPresent TruthValue,
ifAlias DisplayString,
ifCounterDiscontinuityTime TimeStamp
}
ifName OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The textual name of the interface. The value of this
object should be the name of the interface as assigned
by the local device and should be suitable for use in
commands entered at the device's `console'. This
might be a text name, such as `le0' or a simple port
number, such as `1', depending on the interface naming
syntax of the device. If several entries in the
ifTable together represent a single interface as named
by the device, then each will have the same value of
ifName. Note that for an agent which responds to SNMP
queries concerning an interface on some other
(proxied) device, then the value of ifName for such an
interface is the proxied device's local name for it.
If there is no local name, or this object is otherwise
not applicable, then this object contains a zero-
length string."
::= { ifXEntry 1 }
ifInMulticastPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets, delivered by this sub-layer to
a higher (sub-)layer, which were addressed to a
multicast address at this sub-layer. For a MAC layer
protocol, this includes both Group and Functional
addresses.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 2 }
ifInBroadcastPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets, delivered by this sub-layer to
a higher (sub-)layer, which were addressed to a
broadcast address at this sub-layer.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 3 }
ifOutMulticastPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of packets that higher-level
protocols requested be transmitted, and which were
addressed to a multicast address at this sub-layer,
including those that were discarded or not sent. For
a MAC layer protocol, this includes both Group and
Functional addresses.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 4 }
ifOutBroadcastPkts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of packets that higher-level
protocols requested be transmitted, and which were
addressed to a broadcast address at this sub-layer,
including those that were discarded or not sent.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 5 }
--
-- High Capacity Counter objects. These objects are all
-- 64 bit versions of the "basic" ifTable counters. These
-- objects all have the same basic semantics as their 32-bit
-- counterparts, however, their syntax has been extended
-- to 64 bits.
--
ifHCInOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of octets received on the interface,
including framing characters. This object is a 64-bit
version of ifInOctets.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 6 }
ifHCInUcastPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets, delivered by this sub-layer to
a higher (sub-)layer, which were not addressed to a
multicast or broadcast address at this sub-layer.
This object is a 64-bit version of ifInUcastPkts.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 7 }
ifHCInMulticastPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets, delivered by this sub-layer to
a higher (sub-)layer, which were addressed to a
multicast address at this sub-layer. For a MAC layer
protocol, this includes both Group and Functional
addresses. This object is a 64-bit version of
ifInMulticastPkts.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 8 }
ifHCInBroadcastPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets, delivered by this sub-layer to
a higher (sub-)layer, which were addressed to a
broadcast address at this sub-layer. This object is a
64-bit version of ifInBroadcastPkts.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 9 }
ifHCOutOctets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of octets transmitted out of the
interface, including framing characters. This object
is a 64-bit version of ifOutOctets.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 10 }
ifHCOutUcastPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of packets that higher-level
protocols requested be transmitted, and which were not
addressed to a multicast or broadcast address at this
sub-layer, including those that were discarded or not
sent. This object is a 64-bit version of
ifOutUcastPkts.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 11 }
ifHCOutMulticastPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of packets that higher-level
protocols requested be transmitted, and which were
addressed to a multicast address at this sub-layer,
including those that were discarded or not sent. For
a MAC layer protocol, this includes both Group and
Functional addresses. This object is a 64-bit version
of ifOutMulticastPkts.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 12 }
ifHCOutBroadcastPkts OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of packets that higher-level
protocols requested be transmitted, and which were
addressed to a broadcast address at this sub-layer,
including those that were discarded or not sent. This
object is a 64-bit version of ifOutBroadcastPkts.
Discontinuities in the value of this counter can occur
at re-initialization of the management system, and at
other times as indicated by the value of
ifCounterDiscontinuityTime."
::= { ifXEntry 13 }
ifLinkUpDownTrapEnable OBJECT-TYPE
SYNTAX INTEGER { enabled(1), disabled(2) }
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Indicates whether linkUp/linkDown traps should be
generated for this interface.
By default, this object should have the value
enabled(1) for interfaces which do not operate on
'top' of any other interface (as defined in the
ifStackTable), and disabled(2) otherwise."
::= { ifXEntry 14 }
ifHighSpeed OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"An estimate of the interface's current bandwidth in
units of 1,000,000 bits per second. If this object
reports a value of `n' then the speed of the interface
is somewhere in the range of `n-500,000' to
`n+499,999'. For interfaces which do not vary in
bandwidth or for those where no accurate estimation
can be made, this object should contain the nominal
bandwidth. For a sub-layer which has no concept of
bandwidth, this object should be zero."
::= { ifXEntry 15 }
ifPromiscuousMode OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object has a value of false(2) if this interface
only accepts packets/frames that are addressed to this
station. This object has a value of true(1) when the
station accepts all packets/frames transmitted on the
media. The value true(1) is only legal on certain
types of media. If legal, setting this object to a
value of true(1) may require the interface to be reset
before becoming effective.
The value of ifPromiscuousMode does not affect the
reception of broadcast and multicast packets/frames by
the interface."
::= { ifXEntry 16 }
ifConnectorPresent OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object has the value 'true(1)' if the interface
sublayer has a physical connector and the value
'false(2)' otherwise."
::= { ifXEntry 17 }
ifAlias OBJECT-TYPE
SYNTAX DisplayString (SIZE(0..64))
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object is an 'alias' name for the interface as
specified by a network manager, and provides a non-
volatile 'handle' for the interface.
On the first instantiation of an interface, the value
of ifAlias associated with that interface is the
zero-length string. As and when a value is written
into an instance of ifAlias through a network
management set operation, then the agent must retain
the supplied value in the ifAlias instance associated
with the same interface for as long as that interface
remains instantiated, including across all re-
initializations/reboots of the network management
system, including those which result in a change of
the interface's ifIndex value.
An example of the value which a network manager might
store in this object for a WAN interface is the
(Telco's) circuit number/identifier of the interface.
Some agents may support write-access only for
interfaces having particular values of ifType. An
agent which supports write access to this object is
required to keep the value in non-volatile storage,
but it may limit the length of new values depending on
how much storage is already occupied by the current
values for other interfaces."
::= { ifXEntry 18 }
ifCounterDiscontinuityTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime on the most recent occasion at
which any one or more of this interface's counters
suffered a discontinuity. The relevant counters are
the specific instances associated with this interface
of any Counter32 or Counter64 object contained in the
ifTable or ifXTable. If no such discontinuities have
occurred since the last re-initialization of the local
management subsystem, then this object contains a zero
value."
::= { ifXEntry 19 }
-- The Interface Stack Group
--
-- Implementation of this group is mandatory for all systems
--
ifStackTable OBJECT-TYPE
SYNTAX SEQUENCE OF IfStackEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The table containing information on the relationships
between the multiple sub-layers of network interfaces.
In particular, it contains information on which sub-
layers run 'on top of' which other sub-layers, where
each sub-layer corresponds to a conceptual row in the
ifTable. For example, when the sub-layer with ifIndex
value x runs over the sub-layer with ifIndex value y,
then this table contains:
ifStackStatus.x.y=active
For each ifIndex value, I, which identifies an active
interface, there are always at least two instantiated
rows in this table associated with I. For one of
these rows, I is the value of ifStackHigherLayer; for
the other, I is the value of ifStackLowerLayer. (If I
is not involved in multiplexing, then these are the
only two rows associated with I.)
For example, two rows exist even for an interface
which has no others stacked on top or below it:
ifStackStatus.0.x=active
ifStackStatus.x.0=active "
::= { ifMIBObjects 2 }
ifStackEntry OBJECT-TYPE
SYNTAX IfStackEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Information on a particular relationship between two
sub-layers, specifying that one sub-layer runs on
'top' of the other sub-layer. Each sub-layer
corresponds to a conceptual row in the ifTable."
INDEX { ifStackHigherLayer, ifStackLowerLayer }
::= { ifStackTable 1 }
IfStackEntry ::=
SEQUENCE {
ifStackHigherLayer Integer32,
ifStackLowerLayer Integer32,
ifStackStatus RowStatus
}
(next page on part 3)
