Description

This document provides the SNMP MIB used to determine tail drops counters on an interface with SNMP MIB walk.

Symptoms

 

Solution

 

This command will give us the snmp index number.

Switch@juniper> show snmp mib walk ifDescr | grep ge-0/0/0

ifDescr.206 = ge-0/0/0

This command will give us the queue number mapped to particular SNMP OID:-

Switch@juniper> show snmp mib walk 1.3.6.1.4.1.2636.3.15.2.1.2

jnxCosFcQueueNr.11.98.101.115.116.45.101.102.102.111.114.116 = 0     <=== best effort
jnxCosFcQueueNr.15.110.101.116.119.111.114.107.45.99.111.110.116.114.111.108 = 7     <=== Network Control

jnxCosFcQueueNr.18.97.115.115.117.114.101.100.45.102.111.114.119.97.114.100.105.110.103 = 1     <====assured-forwarding

jnxCosFcQueueNr.20.101.120.112.101.100.105.116.101.100.45.102.111.114.119.97.114.100.105.110.103 = 5     <===== expedited-forwarding

For example if we want to see tail dropped of an interface ge-0/0/0

Switch@juniper> show snmp mib walk jnxCosIfqTailDropPkts | grep 206

jnxCosIfqTailDropPkts.206.11.98.101.115.116.45.101.102.102.111.114.116 = 0

jnxCosIfqTailDropPkts.206.15.110.101.116.119.111.114.107.45.99.111.110.116.114.111.108 = 0

jnxCosIfqTailDropPkts.206.18.97.115.115.117.114.101.100.45.102.111.114.119.97.114.100.105.110.103 = 0

jnxCosIfqTailDropPkts.206.20.101.120.112.101.100.105.116.101.100.45.102.111.114.119.97.114.100.105.110.103 = 0

In the above example 11 represents best effort and 15 represents network control and so on... for the rest of the queues.