OPERATIONAL DEFECT DATABASE
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Release-note
Syslog messages indicating objects in retry queue: RP/0/RP0/CPU0:2023 Oct 21 08:13:23.688 UTC: fib_mgr[371]: %ROUTING-FIB-4-RETRYDB_NONEMPTY : 15 FIB object(s) have been in IPv6 retry queue for at least 120 seconds RP/0/RP0/CPU0:2023 Oct 21 08:13:53.046 UTC: fib_mgr[371]: %ROUTING-FIB-4-RETRYDB_NONEMPTY : 17 FIB object(s) have been in IPv4 retry queue for at least 120 seconds Unresolved prefixes in "show cef unresolved". Some try again error in "show cef ipv4 retry-db" or "show cef ipv6 retry-db": 'FIB' detected the 'try again' condition 'Temporary failure. Try again later' FIB errors "show cef trace": Apr 13 14:04:14.136 fib/common/error 0/12/CPU0 t6210 YPE_NHID-IPV6-RIB-DEL-OBJ_HIST:[fe80::/128,ifh:0xa760] Error rc=6 [old NHID unbind failed] Del for nhid:0x20254 CEF drop adjacencies for valid routes and CEF unresolved routes causing traffic outage.
IP/MPLS route churn will cause router to run out of Object-IDs and stops programming in hardware. From the release R7.5.4 onwards, to confirm whether the router is running out of Object-IDs, check "show cef misc" and the inuse counter should have reached 134217728: FIB object id Aggregated Statistics: ----------------------------------- DomainID: 0 alloced 519197446, updated 1742031234, freed 384979718, inuse 134217728, hi water 134217728 DomainID: 1 alloced 36, updated 0, freed 28, inuse 8, hi water 8 No more object can be allocated once 134217728 is reached and this will cause objects to go to the retry DB and they won't be programmed in HW.
Reload the router or location running out of Object-IDs.
This is a platform independent issue, and has existed since 7.2.1 release. When the issue occurs (object-ID exhaustion), hardware programming is stopped. Hence forwarding is affected.
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