Description

This article describes the issue of SNMP MIB walking for ipv6IfStatsInReceives and jnxIpv6IfStats abnormally returning 0 for the aeX interface on ABC chipset platforms.

Symptoms

Junos code has an issue with collecting input IPv6 statistics of the AE IFL on the ABC chipset (M5, M7i, M10, and M10i):

user@M7i-re0> show snmp mib walk ipv6IfDescr 
ipv6IfDescr.510 = ae0.0
ipv6IfDescr.514 = ae1.0
ipv6IfDescr.624 = ge-0/0/0.0
ipv6IfDescr.628 = ge-0/0/3.0

user@M7i-re0> show snmp mib walk ipv6IfStatsInReceives
ipv6IfStatsInReceives.510 = 0
ipv6IfStatsInReceives.514 = 0
ipv6IfStatsInReceives.624 = 18686474
ipv6IfStatsInReceives.628 = 18686502

user@M7i-re0> show snmp mib walk jnxIpv6IfStats
jnxIpv6IfInOctets.510 = 0
jnxIpv6IfInOctets.514 = 0
jnxIpv6IfInOctets.624 = 1718594858
jnxIpv6IfInOctets.628 = 1718597266
jnxIpv6IfOutOctets.510 = 1083737828
jnxIpv6IfOutOctets.514 = 1083743880
jnxIpv6IfOutOctets.624 = 1372648034
jnxIpv6IfOutOctets.628 = 1372642272

Solution

This issue is due to a software bug and it has been fixed in 12.2R or later.