Symptom
Stale entries are stored in CEF for LCs where ND negotiation was not taking place:
RP/0/RP0/CPU0:5508_Left#show adjacency ipv6 BVI100 internal detail location 0/0/CPU0 | i 2aaa:bbbb:eeee:0:192:168:135
Wed Jul 14 08:40:07.367 PDT
BVI100,2aaa:bbbb:eeee:0:192:168:135:2 (ipv6)
BVI100,2aaa:bbbb:eeee:0:192:168:135:6 (ipv6)
BVI100,2aaa:bbbb:eeee:0:192:168:135:4 (ipv6)
RP/0/RP0/CPU0:5508_Left#show adjacency ipv6 BVI100 internal detail location 0/4/CPU0 | i 2aaa:bbbb:eeee:0:192:168:135 <<< Affected LC
Wed Jul 14 08:40:13.851 PDT
BVI100,2aaa:bbbb:eeee:0:192:168:135:3 (ipv6)
BVI100,2aaa:bbbb:eeee:0:192:168:135:2 (ipv6)
BVI100,2aaa:bbbb:eeee:0:192:168:135:6 (ipv6)
BVI100,2aaa:bbbb:eeee:0:192:168:135:4 (ipv6)
RP/0/RP0/CPU0:5508_Left#show adjacency ipv6 BVI100 internal detail location 0/6/CPU0 | i 2aaa:bbbb:eeee:0:192:168:135 <<< Affected LC
Wed Jul 14 08:40:20.106 PDT
BVI100,2aaa:bbbb:eeee:0:192:168:135:3 (ipv6)
BVI100,2aaa:bbbb:eeee:0:192:168:135:2 (ipv6)
BVI100,2aaa:bbbb:eeee:0:192:168:135:6 (ipv6)
BVI100,2aaa:bbbb:eeee:0:192:168:135:4 (ipv6)
This results in packet loss with trap "RxTrapUserDefine_FIB_IPV6_GLEAN" increasing.
Conditions
This is observed in BVI interfaces (with L2 BE interfaces).
Workaround
reload the affected LC via XR:
reload location 0/x/CPU0
