Cisco Cisco IOS Software Release 12.4(6)T
OSPF: SNMP ifIndex Value for Interface ID in OSPFv2 and OSPFv3 Data Fields
Prerequisites for Using the SNMP ifIndex Value for Interface ID in OSPFv2 and OSPFv3 Data Fields
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Cisco IOS Release: Multiple releases
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Prerequisites for Using the SNMP ifIndex Value for Interface ID
in OSPFv2 and OSPFv3 Data Fields
in OSPFv2 and OSPFv3 Data Fields
OSPF must be configured on the router.
Information About the OSPF: SNMP ifIndex Value for Interface
ID in OSPFv2 and OSPFv3 Data Fields
ID in OSPFv2 and OSPFv3 Data Fields
Before choosing to switch from the current interface numbers to the SNMP MIB-II interface ID
numbers, you should understand the following concepts:
numbers, you should understand the following concepts:
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Benefits of Choosing to Identify Interfaces by the SNMP MIB-II ifIndex Value
If you use Simple Network Management Protocol (SNMP) for your OSPF network, configuring the
OSPF: SNMP ifIndex Value for Interface ID in OSPFv2 and OSPFv3 Data Fields feature can be
beneficial for the following reasons:
OSPF: SNMP ifIndex Value for Interface ID in OSPFv2 and OSPFv3 Data Fields feature can be
beneficial for the following reasons:
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Using the SNMP MIB-II ifIndex (interface index) identification numbers to identify OSPF
interfaces makes it easier for network administrators to identify interfaces because the numbers will
correspond to the numbers that they will see reported by SNMP.
interfaces makes it easier for network administrators to identify interfaces because the numbers will
correspond to the numbers that they will see reported by SNMP.
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When examining link-state advertisements (LSAs), the value used in fields that have the interface
ID will be the same as the value that is reported by SNMP.
ID will be the same as the value that is reported by SNMP.
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When looking at the output of the show ipv6 ospf interface command, the interface ID number will
have the same value that is reported by SNMP.
have the same value that is reported by SNMP.
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Using the SNMP MIB-II IfIndex is also suggested, but not required, by the OSPF RFC 2328 for
OSPFv2 and the RFC 2740 for OSPFv3.
OSPFv2 and the RFC 2740 for OSPFv3.
How OSPFv2 and OSPFv3 Use the SNMP MIB-II ifIndex Value
The user chooses for OSPF interfaces to use the SNMP MIB-II ifIndex number by entering the
interface-id snmp-if-index command for a specific OSPF process. If an interface under the specific
OSPF process does not have an SNMP ifIndex number, OSPF will not be enabled on that interface.
interface-id snmp-if-index command for a specific OSPF process. If an interface under the specific
OSPF process does not have an SNMP ifIndex number, OSPF will not be enabled on that interface.
For OSPFv2, the ifIndex number is used for the Link Data field in the Router LSA for unnumbered
point-to-point interfaces and sham links. When the interface-id snmp-if-index command is entered, the
affected LSAs will immediately be reoriginated.
point-to-point interfaces and sham links. When the interface-id snmp-if-index command is entered, the
affected LSAs will immediately be reoriginated.