Useful SNMP notes

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[TOC]

SNMP is a widely used protocol with a lot of great and not so great features. This is my notes on things related to this protocol that I use frequently.

Useful OIDs

Interface related

Interface description

OID value: 1.3.6.1.2.1.2.2.1.2

Interface octet in

64 bit counter for a total number of received octets/bytes.

OID value: 1.3.6.1.2.1.31.1.1.1.6

Interface octet out

64 bit counter for a total number of transmitted octets/bytes.

OID value: 1.3.6.1.2.1.31.1.1.1.10

Turn of SNMPd cache

To turn off SNMPd cache on the Debian Linux package you have to, as far as I know, do this with SNMP.

First, check your current cache time:

$ snmpwalk -v2c -c public 10.0.0.1 1.3.6.1.4.1.8072.1.5.3.1.2.1.3.6.1.2.1.2.2
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.2.2 = INTEGER: 15

The integer represents seconds.

To change it, from a rwcommunity issue:

$ snmpset -v2c -c public 10.0.0.1 1.3.6.1.4.1.8072.1.5.3.1.2.1.3.6.1.2.1.2.2 i 0
NET-SNMP-AGENT-MIB::nsCacheTimeout.1.3.6.1.2.1.2.2 = INTEGER: 0