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Forum Discussion

yee379_137296's avatar
yee379_137296
Icon for Nimbostratus rankNimbostratus
Nov 07, 2013

snmp mac address and if index query

i normally query for all arp entries using the RFC1213-MIB mib and ipNetToMediaPhysAddress or ipNetToPhysicalPhysAddress oid; the typical output is something like: IP-MIB::ipNetToPhysi...
arp
mac_address
management
snmp
VernonWells's avatar
VernonWells
Icon for Employee rankEmployee
Dec 17, 2013

The ipNetToPhysicalPhysAddress indices match the ifIndex scheme used in the ipv6IfTable. To get the textual representation of the interface names, use ipv6IfDescr. For example:

 

snmpwalk -c public -v 2c localhost ipNetToPhysicalPhysAddress IP-MIB::ipNetToPhysicalPhysAddress.2.ipv4."192.168.10.17" = STRING: 24:77:3:87:b8:68 IP-MIB::ipNetToPhysicalPhysAddress.8.ipv4."127.1.1.2" = STRING: 0:1:23:45:67:0 IP-MIB::ipNetToPhysicalPhysAddress.8.ipv4."127.1.1.3" = STRING: 0:1:23:45:67:1 IP-MIB::ipNetToPhysicalPhysAddress.16.ipv4."10.11.113.22" = STRING: 0:c:29:c3:86:f1

 

snmpwalk -c public -v 2c localhost ipv6IfDescr IPV6-MIB::ipv6IfDescr.1 = STRING: lo IPV6-MIB::ipv6IfDescr.2 = STRING: eth0 IPV6-MIB::ipv6IfDescr.3 = STRING: eth1 IPV6-MIB::ipv6IfDescr.4 = STRING: eth2 IPV6-MIB::ipv6IfDescr.5 = STRING: eth3 IPV6-MIB::ipv6IfDescr.8 = STRING: tmm0 IPV6-MIB::ipv6IfDescr.16 = STRING: external

 

eth0 is the mgmt interface. tmm0 is an internal interface used by TMOS. external is the name of a VLAN (and the only defined VLAN) on this system.