Arista Interface IP addresses

In short, Arista implements the default routing table Interface IP addresses normally, ie. without context. See details at SNMP Interface IP Discovery.

Interfaces in a VRF are discovered by calling the same MIB variables, but with a SNMP v3 ‘context’ set to the VRF name.

In _get_my_vrfs(), if VRFs are found, we loop through those VRFs, set the SNMPv3 context, and make the call to _get_my_ip_addresses() (from SnmpConnector()) again for each VRF.

EOS ‘context’ or VRF specific MIB data

As of EOS v4.33.2F, the ‘context’ (ie. VRF) SNMP data returns entries from the following MIB counters:

Command run:

snmpwalk -n <VRF_NAME> -On -v 3 -l <your_auth_method> <auth-options-as-needed> <ip-address> .1

ipForwarding = .1.3.6.1.2.1.4.1

ipAddrEntry = .1.3.6.1.2.1.4.20.1

ipCidrRouteTable = .1.3.6.1.2.1.4.24.4

inetCidrRouteTable .1.3.6.1.2.1.4.24.7

ipAddressPrefixTable .1.3.6.1.2.1.4.32

ipAddressTable = ‘.1.3.6.1.2.1.4.34’

ipNetToPhysicalEntry = ‘.1.3.6.1.2.1.4.35.1’

BGP mib = .1.3.6.1.2.1.15

enterprise.arista = .1.3.6.1.4.1.30065

aristaSwIpForwardingMIB .1.3.6.1.4.1.30065.3.1

aristaFIBStatsMIB .1.3.6.1.4.1.30065.3.23