[c-nsp] CEF inconsistency with 12.2(25)S1

[Bernhard Schmidt]

Hi,

since I upgraded two of my backbone routers to 12.2(25)S I periodically
had some issues with updates in the routing table not being reflected in
CEF. Update to 12.2(25)S1 did not solve the problem.

Recent example:

BACK1-C7206-OTN-SATIP#sh ipv6 route 2001:7fd::/32
IPv6 Routing Table - 577 entries
[...]
B   2001:7FD::/32 [20/20]
     via FE80::426E:E, Tunnel301

BACK1-C7206-OTN-SATIP#sh ipv6 cef 2001:7fd::/32
2001:7FD::/32
  nexthop FE80::20C:86FF:FE9A:3819 GigabitEthernet0/3

Same thing on the box connected at Gi0/3 -> I have a nice loop here.

"no ipv6 cef; ipv6 cef" fixes the problem, but since only a few prefixes
are broken at a time you have to notice the problem first.

Any ideas? I have

cef table consistency-check IPv6
cef table consistency-check IPv6 data-checking
cef table consistency-check IPv6 error-message

but "show cef table consistency-check" doesn't show any errors.

Bernhard