Administrator Guide

If you know the interface index, use the following commands to find the interface number.
DellEMC ~ $ snmpwalk -v 2c -c public 10.16.206.127 .1.3.6.1.2.1.2.2.1.2 | grep 2097156
IF-MIB::ifDescr.2097156 = STRING: TenGigabitEthernet 1/1
DellEMC ~ $ snmpwalk -v 2c -c public 10.16.206.127 .1.3.6.1.2.1.31.1.1.1.1 | grep 2097156
IF-MIB::ifName.2097156 = STRING: TenGigabitEthernet 1/1
You can use the show interfaces command to view the interface index.
Dell#show interface fortyGigE 0/4
fortyGigE 0/4 is down, line protocol is down
Description: if_0/4 | if_forty
Hardware is DellForce10Eth, address is 74:86:7a:ff:6f:08
Current address is 74:86:7a:ff:6f:08
Pluggable media not present
Interface index is 2097156
[output omitted]
Monitoring BGP sessions via SNMP
This section covers the monitoring of BGP sessions using SNMP.
BGP SNMP support for non-default VRF uses a SNMP context to distinguish multiple BGP VRF instances within a single BGP
process. SNMP context is a repository of management information that can be accessed through the SNMP agent. SNMP
supports multiple contexts in a device. SNMPv3 has a context name field in its PDU, which automatically allows the context
name field to be mapped to a particular VRF instance without having to be mapped to a community map. SNMPv2c context has
to be mapped to a community map. A new CLI command, snmp context, under BGP context, has been introduced to perform
this function.
To map the context to a VRF instance for SNMPv2c, follow these steps:
1. Create a community and map a VRF to it. Create a context and map the context and community, to a community map.
● sho run snmp
● snmp-server community public ro
● snmp-server community public ro
● snmp-server community vrf1 ro
● snmp-server community vrf2 ro
● snmp-server context context1
● snmp-server context context2
● snmp mib community-map vrf1 context context1
● snmp mib community-map vrf1 context context2
2. Configure snmp context under the VRF instances.
● sho run bgp
● router bgp 100
● address-family ipv4 vrf vrf1
● snmp context context1
● neighbor 20.1.1.1 remote-as 200
● neighbor 20.1.1.1 no shutdown
● exit-address-family
● address-family ipv4 vrf vrf2
● snmp context context2
● timers bgp 30 90
● neighbor 30.1.1.1 remote-as 200
● neighbor 30.1.1.1 no shutdown
● exit-address-family
To map the context to a VRF instance for SNMPv3, follow these steps:
1. Create a community and map a VRF to it. Create a context and map the context and community, to a community map.
● snmp-server community public ro
Simple Network Management Protocol (SNMP)
943