RFC 2233
The Interfaces Group MIB using SMIv2
ifStackHigherLayer OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The value of ifIndex corresponding to the higher
sub-layer of the relationship, i.e., the sub-layer
which runs on 'top' of the sub-layer identified by the
corresponding instance of ifStackLowerLayer. If there
is no higher sub-layer (below the internetwork layer),
then this object has the value 0."
::= { ifStackEntry 1 }
ifStackLowerLayer OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The value of ifIndex corresponding to the lower sub-
layer of the relationship, i.e., the sub-layer which
runs 'below' the sub-layer identified by the
corresponding instance of ifStackHigherLayer. If
there is no lower sub-layer, then this object has the
value 0."
::= { ifStackEntry 2 }
ifStackStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of the relationship between two sub-
layers.
Changing the value of this object from 'active' to
'notInService' or 'destroy' will likely have
consequences up and down the interface stack. Thus,
write access to this object is likely to be
inappropriate for some types of interfaces, and many
implementations will choose not to support write-
access for any type of interface."
::= { ifStackEntry 3 }
ifStackLastChange OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime at the time of the last change
of the (whole) interface stack. A change of the
interface stack is defined to be any creation,
deletion, or change in value of any instance of
ifStackStatus. If the interface stack has been
unchanged since the last re-initialization of the
local network management subsystem, then this object
contains a zero value."
::= { ifMIBObjects 6 }
-- Generic Receive Address Table
--
-- This group of objects is mandatory for all types of
-- interfaces which can receive packets/frames addressed to
-- more than one address.
--
-- This table replaces the ifExtnsRcvAddr table. The main
-- difference is that this table makes use of the RowStatus
-- textual convention, while ifExtnsRcvAddr did not.
ifRcvAddressTable OBJECT-TYPE
SYNTAX SEQUENCE OF IfRcvAddressEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains an entry for each address
(broadcast, multicast, or uni-cast) for which the
system will receive packets/frames on a particular
interface, except as follows:
- for an interface operating in promiscuous mode,
entries are only required for those addresses for
which the system would receive frames were it not
operating in promiscuous mode.
- for 802.5 functional addresses, only one entry is
required, for the address which has the functional
address bit ANDed with the bit mask of all functional
addresses for which the interface will accept frames.
A system is normally able to use any unicast address
which corresponds to an entry in this table as a
source address."
::= { ifMIBObjects 4 }
ifRcvAddressEntry OBJECT-TYPE
SYNTAX IfRcvAddressEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A list of objects identifying an address for which
the system will accept packets/frames on the
particular interface identified by the index value
ifIndex."
INDEX { ifIndex, ifRcvAddressAddress }
::= { ifRcvAddressTable 1 }
IfRcvAddressEntry ::=
SEQUENCE {
ifRcvAddressAddress PhysAddress,
ifRcvAddressStatus RowStatus,
ifRcvAddressType INTEGER
}
ifRcvAddressAddress OBJECT-TYPE
SYNTAX PhysAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An address for which the system will accept
packets/frames on this entry's interface."
::= { ifRcvAddressEntry 1 }
ifRcvAddressStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to create and delete rows in the
ifRcvAddressTable."
::= { ifRcvAddressEntry 2 }
ifRcvAddressType OBJECT-TYPE
SYNTAX INTEGER {
other(1),
volatile(2),
nonVolatile(3)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object has the value nonVolatile(3) for those
entries in the table which are valid and will not be
deleted by the next restart of the managed system.
Entries having the value volatile(2) are valid and
exist, but have not been saved, so that will not exist
after the next restart of the managed system. Entries
having the value other(1) are valid and exist but are
not classified as to whether they will continue to
exist after the next restart."
DEFVAL { volatile }
::= { ifRcvAddressEntry 3 }
-- definition of interface-related traps.
linkDown NOTIFICATION-TYPE
OBJECTS { ifIndex, ifAdminStatus, ifOperStatus }
STATUS current
DESCRIPTION
"A linkDown trap signifies that the SNMPv2 entity,
acting in an agent role, has detected that the
ifOperStatus object for one of its communication links
is about to enter the down state from some other state
(but not from the notPresent state). This other state
is indicated by the included value of ifOperStatus."
::= { snmpTraps 3 }
linkUp NOTIFICATION-TYPE
OBJECTS { ifIndex, ifAdminStatus, ifOperStatus }
STATUS current
DESCRIPTION
"A linkDown trap signifies that the SNMPv2 entity,
acting in an agent role, has detected that the
ifOperStatus object for one of its communication links
left the down state and transitioned into some other
state (but not into the notPresent state). This other
state is indicated by the included value of
ifOperStatus."
::= { snmpTraps 4 }
-- conformance information
ifConformance OBJECT IDENTIFIER ::= { ifMIB 2 }
ifGroups OBJECT IDENTIFIER ::= { ifConformance 1 }
ifCompliances OBJECT IDENTIFIER ::= { ifConformance 2 }
-- compliance statements
ifCompliance2 MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for SNMPv2 entities which
have network interfaces."
MODULE -- this module
MANDATORY-GROUPS { ifGeneralInformationGroup, ifStackGroup2,
ifCounterDiscontinuityGroup }
GROUP ifFixedLengthGroup
DESCRIPTION
"This group is mandatory for all network interfaces
which are character-oriented or transmit data in
fixed-length transmission units."
GROUP ifHCFixedLengthGroup
DESCRIPTION
"This group is mandatory only for those network
interfaces which are character-oriented or transmit
data in fixed-length transmission units, and for which
the value of the corresponding instance of ifSpeed is
greater than 20,000,000 bits/second."
GROUP ifPacketGroup
DESCRIPTION
"This group is mandatory for all network interfaces
which are packet-oriented."
GROUP ifHCPacketGroup
DESCRIPTION
"This group is mandatory only for those network
interfaces which are packet-oriented and for which the
value of the corresponding instance of ifSpeed is
greater than 650,000,000 bits/second."
GROUP ifRcvAddressGroup
DESCRIPTION
"The applicability of this group MUST be defined by
the media-specific MIBs. Media-specific MIBs must
define the exact meaning, use, and semantics of the
addresses in this group."
OBJECT ifLinkUpDownTrapEnable
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT ifPromiscuousMode
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT ifStackStatus
SYNTAX INTEGER { active(1) } -- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one of the six
enumerated values for the RowStatus textual convention
need be supported, specifically: active(1)."
OBJECT ifAdminStatus
SYNTAX INTEGER { up(1), down(2) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, nor is support for the
value testing(3)."
OBJECT ifAlias
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
::= { ifCompliances 2 }
-- units of conformance
ifGeneralInformationGroup OBJECT-GROUP
OBJECTS { ifIndex, ifDescr, ifType, ifSpeed, ifPhysAddress,
ifAdminStatus, ifOperStatus, ifLastChange,
ifLinkUpDownTrapEnable, ifConnectorPresent,
ifHighSpeed, ifName, ifNumber, ifAlias,
ifTableLastChange }
STATUS current
DESCRIPTION
"A collection of objects providing information
applicable to all network interfaces."
::= { ifGroups 10 }
-- the following five groups are mutually exclusive; at most
-- one of these groups is implemented for any interface
ifFixedLengthGroup OBJECT-GROUP
OBJECTS { ifInOctets, ifOutOctets, ifInUnknownProtos,
ifInErrors, ifOutErrors }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to non-high speed (non-high speed interfaces
transmit and receive at speeds less than or equal to
20,000,000 bits/second) character-oriented or fixed-
length-transmission network interfaces."
::= { ifGroups 2 }
ifHCFixedLengthGroup OBJECT-GROUP
OBJECTS { ifHCInOctets, ifHCOutOctets,
ifInOctets, ifOutOctets, ifInUnknownProtos,
ifInErrors, ifOutErrors }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to high speed (greater than 20,000,000
bits/second) character-oriented or fixed-length-
transmission network interfaces."
::= { ifGroups 3 }
ifPacketGroup OBJECT-GROUP
OBJECTS { ifInOctets, ifOutOctets, ifInUnknownProtos,
ifInErrors, ifOutErrors,
ifMtu, ifInUcastPkts, ifInMulticastPkts,
ifInBroadcastPkts, ifInDiscards,
ifOutUcastPkts, ifOutMulticastPkts,
ifOutBroadcastPkts, ifOutDiscards,
ifPromiscuousMode }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to non-high speed (non-high speed interfaces
transmit and receive at speeds less than or equal to
20,000,000 bits/second) packet-oriented network
interfaces."
::= { ifGroups 4 }
ifHCPacketGroup OBJECT-GROUP
OBJECTS { ifHCInOctets, ifHCOutOctets,
ifInOctets, ifOutOctets, ifInUnknownProtos,
ifInErrors, ifOutErrors,
ifMtu, ifInUcastPkts, ifInMulticastPkts,
ifInBroadcastPkts, ifInDiscards,
ifOutUcastPkts, ifOutMulticastPkts,
ifOutBroadcastPkts, ifOutDiscards,
ifPromiscuousMode }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to high speed (greater than 20,000,000
bits/second but less than or equal to 650,000,000
bits/second) packet-oriented network interfaces."
::= { ifGroups 5 }
ifVHCPacketGroup OBJECT-GROUP
OBJECTS { ifHCInUcastPkts, ifHCInMulticastPkts,
ifHCInBroadcastPkts, ifHCOutUcastPkts,
ifHCOutMulticastPkts, ifHCOutBroadcastPkts,
ifHCInOctets, ifHCOutOctets,
ifInOctets, ifOutOctets, ifInUnknownProtos,
ifInErrors, ifOutErrors,
ifMtu, ifInUcastPkts, ifInMulticastPkts,
ifInBroadcastPkts, ifInDiscards,
ifOutUcastPkts, ifOutMulticastPkts,
ifOutBroadcastPkts, ifOutDiscards,
ifPromiscuousMode }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to higher speed (greater than 650,000,000
bits/second) packet-oriented network interfaces."
::= { ifGroups 6 }
ifRcvAddressGroup OBJECT-GROUP
OBJECTS { ifRcvAddressStatus, ifRcvAddressType }
STATUS current
DESCRIPTION
"A collection of objects providing information on the
multiple addresses which an interface receives."
::= { ifGroups 7 }
ifStackGroup2 OBJECT-GROUP
OBJECTS { ifStackStatus, ifStackLastChange }
STATUS current
DESCRIPTION
"A collection of objects providing information on the
layering of MIB-II interfaces."
::= { ifGroups 11 }
ifCounterDiscontinuityGroup OBJECT-GROUP
OBJECTS { ifCounterDiscontinuityTime }
STATUS current
DESCRIPTION
"A collection of objects providing information
specific to interface counter discontinuities."
::= { ifGroups 13 }
-- Deprecated Definitions - Objects
--
-- The Interface Test Table
--
-- This group of objects is optional. However, a media-specific
-- MIB may make implementation of this group mandatory.
--
-- This table replaces the ifExtnsTestTable
--
ifTestTable OBJECT-TYPE
SYNTAX SEQUENCE OF IfTestEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"This table contains one entry per interface. It
defines objects which allow a network manager to
instruct an agent to test an interface for various
faults. Tests for an interface are defined in the
media-specific MIB for that interface. After invoking
a test, the object ifTestResult can be read to
determine the outcome. If an agent can not perform
the test, ifTestResult is set to so indicate. The
object ifTestCode can be used to provide further
test-specific or interface-specific (or even
enterprise-specific) information concerning the
outcome of the test. Only one test can be in progress
on each interface at any one time. If one test is in
progress when another test is invoked, the second test
is rejected. Some agents may reject a test when a
prior test is active on another interface.
Before starting a test, a manager-station must first
obtain 'ownership' of the entry in the ifTestTable for
the interface to be tested. This is accomplished with
the ifTestId and ifTestStatus objects as follows:
try_again:
get (ifTestId, ifTestStatus)
while (ifTestStatus != notInUse)
/*
* Loop while a test is running or some other
* manager is configuring a test.
*/
short delay
get (ifTestId, ifTestStatus)
}
/*
* Is not being used right now -- let's compete
* to see who gets it.
*/
lock_value = ifTestId
if ( set(ifTestId = lock_value, ifTestStatus = inUse,
ifTestOwner = 'my-IP-address') == FAILURE)
/*
* Another manager got the ifTestEntry -- go
* try again
*/
goto try_again;
/*
* I have the lock
*/
set up any test parameters.
/*
* This starts the test
*/
set(ifTestType = test_to_run);
wait for test completion by polling ifTestResult
when test completes, agent sets ifTestResult
agent also sets ifTestStatus = 'notInUse'
retrieve any additional test results, and ifTestId
if (ifTestId == lock_value+1) results are valid
A manager station first retrieves the value of the
appropriate ifTestId and ifTestStatus objects,
periodically repeating the retrieval if necessary,
until the value of ifTestStatus is 'notInUse'. The
manager station then tries to set the same ifTestId
object to the value it just retrieved, the same
ifTestStatus object to 'inUse', and the corresponding
ifTestOwner object to a value indicating itself. If
the set operation succeeds then the manager has
obtained ownership of the ifTestEntry, and the value of
the ifTestId object is incremented by the agent (per
the semantics of TestAndIncr). Failure of the set
operation indicates that some other manager has
obtained ownership of the ifTestEntry.
Once ownership is obtained, any test parameters can be
setup, and then the test is initiated by setting
ifTestType. On completion of the test, the agent sets
ifTestStatus to 'notInUse'. Once this occurs, the
manager can retrieve the results. In the (rare) event
that the invocation of tests by two network managers
were to overlap, then there would be a possibility that
the first test's results might be overwritten by the
second test's results prior to the first results being
read. This unlikely circumstance can be detected by a
network manager retrieving ifTestId at the same time as
retrieving the test results, and ensuring that the
results are for the desired request.
If ifTestType is not set within an abnormally long
period of time after ownership is obtained, the agent
should time-out the manager, and reset the value of the
ifTestStatus object back to 'notInUse'. It is
suggested that this time-out period be 5 minutes.
In general, a management station must not retransmit a
request to invoke a test for which it does not receive
a response; instead, it properly inspects an agent's
MIB to determine if the invocation was successful.
Only if the invocation was unsuccessful, is the
invocation request retransmitted.
Some tests may require the interface to be taken off-
line in order to execute them, or may even require the
agent to reboot after completion of the test. In these
circumstances, communication with the management
station invoking the test may be lost until after
completion of the test. An agent is not required to
support such tests. However, if such tests are
supported, then the agent should make every effort to
transmit a response to the request which invoked the
test prior to losing communication. When the agent is
restored to normal service, the results of the test are
properly made available in the appropriate objects.
Note that this requires that the ifIndex value assigned
to an interface must be unchanged even if the test
causes a reboot. An agent must reject any test for
which it cannot, perhaps due to resource constraints,
make available at least the minimum amount of
information after that test completes."
::= { ifMIBObjects 3 }
ifTestEntry OBJECT-TYPE
SYNTAX IfTestEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"An entry containing objects for invoking tests on an
interface."
AUGMENTS { ifEntry }
::= { ifTestTable 1 }
IfTestEntry ::=
SEQUENCE {
ifTestId TestAndIncr,
ifTestStatus INTEGER,
ifTestType AutonomousType,
ifTestResult INTEGER,
ifTestCode OBJECT IDENTIFIER,
ifTestOwner OwnerString
}
ifTestId OBJECT-TYPE
SYNTAX TestAndIncr
MAX-ACCESS read-write
STATUS deprecated
DESCRIPTION
"This object identifies the current invocation of the
interface's test."
::= { ifTestEntry 1 }
ifTestStatus OBJECT-TYPE
SYNTAX INTEGER { notInUse(1), inUse(2) }
MAX-ACCESS read-write
STATUS deprecated
DESCRIPTION
"This object indicates whether or not some manager
currently has the necessary 'ownership' required to
invoke a test on this interface. A write to this
object is only successful when it changes its value
from 'notInUse(1)' to 'inUse(2)'. After completion of
a test, the agent resets the value back to
'notInUse(1)'."
::= { ifTestEntry 2 }
ifTestType OBJECT-TYPE
SYNTAX AutonomousType
MAX-ACCESS read-write
STATUS deprecated
DESCRIPTION
"A control variable used to start and stop operator-
initiated interface tests. Most OBJECT IDENTIFIER
values assigned to tests are defined elsewhere, in
association with specific types of interface.
However, this document assigns a value for a full-
duplex loopback test, and defines the special meanings
of the subject identifier:
noTest OBJECT IDENTIFIER ::= { 0 0 }
When the value noTest is written to this object, no
action is taken unless a test is in progress, in which
case the test is aborted. Writing any other value to
this object is only valid when no test is currently in
progress, in which case the indicated test is
initiated.
When read, this object always returns the most recent
value that ifTestType was set to. If it has not been
set since the last initialization of the network
management subsystem on the agent, a value of noTest
is returned."
::= { ifTestEntry 3 }
ifTestResult OBJECT-TYPE
SYNTAX INTEGER {
none(1), -- no test yet requested
success(2),
inProgress(3),
notSupported(4),
unAbleToRun(5), -- due to state of system
aborted(6),
failed(7)
}
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"This object contains the result of the most recently
requested test, or the value none(1) if no tests have
been requested since the last reset. Note that this
facility provides no provision for saving the results
of one test when starting another, as could be
required if used by multiple managers concurrently."
::= { ifTestEntry 4 }
ifTestCode OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"This object contains a code which contains more
specific information on the test result, for example
an error-code after a failed test. Error codes and
other values this object may take are specific to the
type of interface and/or test. The value may have the
semantics of either the AutonomousType or
InstancePointer textual conventions as defined in RFC
1903. The identifier:
testCodeUnknown OBJECT IDENTIFIER ::= { 0 0 }
is defined for use if no additional result code is
available."
::= { ifTestEntry 5 }
ifTestOwner OBJECT-TYPE
SYNTAX OwnerString
MAX-ACCESS read-write
STATUS deprecated
DESCRIPTION
"The entity which currently has the 'ownership'
required to invoke a test on this interface."
::= { ifTestEntry 6 }
-- Deprecated Definitions - Groups
ifGeneralGroup OBJECT-GROUP
OBJECTS { ifDescr, ifType, ifSpeed, ifPhysAddress,
ifAdminStatus, ifOperStatus, ifLastChange,
ifLinkUpDownTrapEnable, ifConnectorPresent,
ifHighSpeed, ifName }
STATUS deprecated
DESCRIPTION
"A collection of objects deprecated in favour of
ifGeneralInformationGroup."
::= { ifGroups 1 }
ifTestGroup OBJECT-GROUP
OBJECTS { ifTestId, ifTestStatus, ifTestType,
ifTestResult, ifTestCode, ifTestOwner }
STATUS deprecated
DESCRIPTION
"A collection of objects providing the ability to
invoke tests on an interface."
::= { ifGroups 8 }
ifStackGroup OBJECT-GROUP
OBJECTS { ifStackStatus }
STATUS deprecated
DESCRIPTION
"The previous collection of objects providing
information on the layering of MIB-II interfaces."
::= { ifGroups 9 }
ifOldObjectsGroup OBJECT-GROUP
OBJECTS { ifInNUcastPkts, ifOutNUcastPkts,
ifOutQLen, ifSpecific }
STATUS deprecated
DESCRIPTION
"The collection of objects deprecated from the
original MIB-II interfaces group."
::= { ifGroups 12 }
-- Deprecated Definitions - Compliance
ifCompliance MODULE-COMPLIANCE
STATUS deprecated
DESCRIPTION
"The previous compliance statement for SNMPv2 entities
which have network interfaces."
MODULE -- this module
MANDATORY-GROUPS { ifGeneralGroup, ifStackGroup }
GROUP ifFixedLengthGroup
DESCRIPTION
"This group is mandatory for all network interfaces
which are character-oriented or transmit data in
fixed-length transmission units."
GROUP ifHCFixedLengthGroup
DESCRIPTION
"This group is mandatory only for those network
interfaces which are character-oriented or transmit
data in fixed-length transmission units, and for which
the value of the corresponding instance of ifSpeed is
greater than 20,000,000 bits/second."
GROUP ifPacketGroup
DESCRIPTION
"This group is mandatory for all network interfaces
which are packet-oriented."
GROUP ifHCPacketGroup
DESCRIPTION
"This group is mandatory only for those network
interfaces which are packet-oriented and for which the
value of the corresponding instance of ifSpeed is
greater than 650,000,000 bits/second."
GROUP ifTestGroup
DESCRIPTION
"This group is optional. Media-specific MIBs which
require interface tests are strongly encouraged to use
this group for invoking tests and reporting results.
A medium specific MIB which has mandatory tests may
make implementation of this group mandatory."
GROUP ifRcvAddressGroup
DESCRIPTION
"The applicability of this group MUST be defined by
the media-specific MIBs. Media-specific MIBs must
define the exact meaning, use, and semantics of the
addresses in this group."
OBJECT ifLinkUpDownTrapEnable
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT ifPromiscuousMode
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT ifStackStatus
SYNTAX INTEGER { active(1) } -- subset of RowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and only one of the six
enumerated values for the RowStatus textual convention
need be supported, specifically: active(1)."
OBJECT ifAdminStatus
SYNTAX INTEGER { up(1), down(2) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, nor is support for the
value testing(3)."
::= { ifCompliances 1 }
END
7. Acknowledgements
This memo has been produced by the IETF's Interfaces MIB working-
group.
The original proposal evolved from conversations and discussions with
many people, including at least the following: Fred Baker, Ted
Brunner, Chuck Davin, Jeremy Greene, Marshall Rose, Kaj Tesink, and
Dean Throop.
8. References
[1] Case, J., McCloghrie, K., Rose, M., and
S. Waldbusser, "Structure of Management Information for
version 2 of the Simple Network Management Protocol
(SNMPv2)", RFC 1902, January 1996.
[2] Case, J., McCloghrie, K., Rose, M., and
S. Waldbusser, "Textual Conventions for version 2 of the
Simple Network Management Protocol (SNMPv2)", RFC 1903,
January 1996.
[3] Case, J., McCloghrie, K., Rose, M., and
S. Waldbusser, "Protocol Operations for version 2 of the
Simple Network Management Protocol (SNMPv2)", RFC 1905,
January 1996.
[4] McCloghrie, K., and M. Rose, "Management Information Base for
Network Management of TCP/IP-based internets - MIB-II", STD
17, RFC 1213, March 1991.
[5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
Network Management Protocol", STD 15, RFC 1157, May 1990.
[6] Postel, J., "Internet Protocol", STD 5, RFC 791, September 1981.
[7] McCloghrie, K., "Extensions to the Generic-Interface MIB", RFC
1229, May 1991.
[8] ATM Forum Technical Committee, "LAN Emulation Client Management: Version 1.0 Specification", af-lane-0044.000, ATM Forum, September 1995. [9] Stewart, B., "Definitions of Managed Objects for Character Stream Devices using SMIv2", RFC 1658, July 1994. [10] Bradner, S., "Key words for use in RFCs to Indicate Requirements Levels", RFC 2119, March 1997. 9. Security Considerations This MIB contains both readable objects whose values provide the number and status of a device's network interfaces, and write-able objects which allow an administrator to control the interfaces and to perform tests on the interfaces. Unauthorized access to the readable objects is relatively innocuous. Unauthorized access to the write- able objects could cause a denial of service, or in combination with other (e.g., physical) security breaches, could cause unauthorized connectivity to a device. 10. Authors' Addresses Keith McCloghrie Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 Phone: 408-526-5260 EMail: kzm@cisco.com Frank Kastenholz FTP Software 2 High Street North Andover, Mass. USA 01845 Phone: 508-685-4000 EMail: kasten@ftp.com
11. Full Copyright Statement Copyright (C) The Internet Society (1997). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.