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Cisco Unified Communications Manager Managed Services Guide
OL-22523-01
Chapter 8 Industry-Standard Management Information Base
IF-MIB
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 InterfaceIndexOrZero, ifStackLowerLayer
InterfaceIndexOrZero, ifStackStatus RowStatus }
ifStackHigherLayer OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
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 InterfaceIndexOrZero
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
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