-- Network Working Group K. McCloghrie
-- Request for Comments: 2864 Cisco Systems
-- Category: Standards Track G. Hanson
-- ADC Telecommunications
-- June 2000-- The Inverted Stack Table Extension to the Interfaces Group MIBIF-INVERTED-STACK-MIB DEFINITIONS::=BEGINIMPORTSMODULE-IDENTITY,OBJECT-TYPE, mib-2 FROM SNMPv2-SMI
RowStatusFROM SNMPv2-TC
MODULE-COMPLIANCE,OBJECT-GROUPFROM SNMPv2-CONF
ifStackGroup2,ifStackHigherLayer, ifStackLowerLayer FROM IF-MIB;ifInvertedStackMIB MODULE-IDENTITYLAST-UPDATED"200006140000Z"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 which provides the Inverted Stack Table for
interface sub-layers."REVISION"200006140000Z"DESCRIPTION"Initial revision, published as RFC 2864"::={ mib-2 77}ifInvMIBObjects OBJECTIDENTIFIER::={ ifInvertedStackMIB 1}
--
-- The Inverted Interface Stack Group
--ifInvStackTable OBJECT-TYPESYNTAXSEQUENCEOF IfInvStackEntry
MAX-ACCESSnot-accessibleSTATUScurrentDESCRIPTION"A table containing information on the relationships between
the multiple sub-layers of network interfaces. In
particular, it contains information on which sub-layers run
'underneath' 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
underneath the sub-layer with ifIndex value y, then this
table contains:
ifInvStackStatus.x.y=active
For each ifIndex value, z, which identifies an active
interface, there are always at least two instantiated rows
in this table associated with z. For one of these rows, z
is the value of ifStackHigherLayer; for the other, z is the
value of ifStackLowerLayer. (If z is not involved in
multiplexing, then these are the only two rows associated
with z.)
For example, two rows exist even for an interface which has
no others stacked on top or below it:
ifInvStackStatus.z.0=active
ifInvStackStatus.0.z=active
This table contains exactly the same number of rows as the
ifStackTable, but the rows appear in a different order."REFERENCE"ifStackTable of RFC 2863"::={ ifInvMIBObjects 1}ifInvStackEntry OBJECT-TYPESYNTAX IfInvStackEntry
MAX-ACCESSnot-accessibleSTATUScurrentDESCRIPTION"Information on a particular relationship between two sub-
layers, specifying that one sub-layer runs underneath the
other sub-layer. Each sub-layer corresponds to a conceptual
row in the ifTable."INDEX{ ifStackLowerLayer, ifStackHigherLayer }::={ ifInvStackTable 1}
IfInvStackEntry ::=SEQUENCE{
ifInvStackStatus RowStatus}ifInvStackStatus OBJECT-TYPESYNTAXRowStatusMAX-ACCESSread-onlySTATUScurrentDESCRIPTION"The status of the relationship between two sub-layers.
An instance of this object exists for each instance of the
ifStackStatus object, and vice versa. For example, if the
variable ifStackStatus.H.L exists, then the variable
ifInvStackStatus.L.H must also exist, and vice versa. In
addition, the two variables always have the same value.
However, unlike ifStackStatus, the ifInvStackStatus object
is NOT write-able. A network management application wishing
to change a relationship between sub-layers H and L cannot
do so by modifying the value of ifInvStackStatus.L.H, but
must instead modify the value of ifStackStatus.H.L. After
the ifStackTable is modified, the change will be reflected
in this table."::={ ifInvStackEntry 1}
-- conformance informationifInvConformance OBJECTIDENTIFIER::={ ifInvMIBObjects 2}ifInvGroups OBJECTIDENTIFIER::={ ifInvConformance 1}ifInvCompliances OBJECTIDENTIFIER::={ ifInvConformance 2}-- compliance statementsifInvCompliance MODULE-COMPLIANCESTATUScurrentDESCRIPTION"The compliance statement for SNMP entities which provide
inverted information on the layering of network interfaces."MODULE-- this moduleMANDATORY-GROUPS{ ifInvStackGroup }OBJECT ifInvStackStatus
SYNTAXINTEGER{ active(1)}
DESCRIPTION"Support is only required for 'active'."MODULE IF-MIB
MANDATORY-GROUPS{ ifStackGroup2 }::={ ifInvCompliances 1}-- units of conformanceifInvStackGroup OBJECT-GROUPOBJECTS{ ifInvStackStatus }STATUScurrentDESCRIPTION"A collection of objects providing inverted information on
the layering of MIB-II interfaces."::={ ifInvGroups 1}END