[c-nsp] unknown interface for ipv6 route in 4.2.3

[Tassos Chatzithomaoglou]

Any idea what Unknown interface is? 
CSCtq62370 probably doesn't apply in 4.2.3.


RP/0/RP0/CPU0:CRS#sh route ipv6 2001:648::/32

Routing entry for 2001:648::/32
  Known via "bgp 1241", distance 200, metric 0
  Tag 5408, type external
  Installed Jun  6 15:58:53.474 for 00:00:05
  Routing Descriptor Blocks
    fe80::222:83ff:fe42:923d, from 2001:648:2100::1, via Unknown
      Route metric is 0
  No advertising protos.

RP/0/RP0/CPU0:CRS#sh route ipv6 2001:648:2100::1

Routing entry for 2001:648:2100::/48
  Known via "connected", distance 0, metric 0 (connected)
  Installed Jan  9 10:07:57.360 for 3w0d
  Routing Descriptor Blocks
    directly connected, via TenGigE0/2/0/3.290851
      Route metric is 0
  No advertising protos. 

RP/0/RP0/CPU0:CRS#sh cef ipv6 2001:648::/32 det
2001:648::/32, version 2081, internal 0x14000001 (ptr 0x9d9403fc) [1], 0x0 (0x9d1fd548), 0x0 (0x0)
 Updated Jan  9 10:07:57.376 
 remote adjacency to UNKNOWN intf 0x012801c0
 Prefix Len 32, traffic index 0, precedence routine (0), priority 4
  gateway array (0x9cfc0e5c) reference count 5, flags 0x0, source rib (5), 0 backups
                [6 type 3 flags 0x10101 (0x9d1028c0) ext 0x0 (0x0)]
  LW-LDI[type=3, refc=1, ptr=0x9d1fd548, sh-ldi=0x9d1028c0]
   via fe80::222:83ff:fe42:923d, UNKNOWN intf 0x012801c0, 2 dependencies, weight 0, class 0, bgp-ext [flags 0x6020]
    path-idx 0 [0x9e01619c 0x0]
    next hop fe80::222:83ff:fe42:923d
    remote adjacency


    Load distribution: 0 (refcount 6)

    Hash  OK  Interface                 Address
    0     Y   UNKNOWN intf 0x012801c0   remote         


RP/0/RP0/CPU0:CRS#sh cef ipv6 2001:648:2100::1 det
2001:648:2100::/48, version 2080, attached, connected, internal 0x40000c1 (ptr 0x9d9405dc) [1], 0x0 (0x9d1fd5f8), 0x0 (0x0)
 Updated Jan  9 10:07:57.370 
 remote adjacency to TenGigE0/2/0/3.290851
 Prefix Len 48, traffic index 0, precedence routine (0), priority 0
  gateway array (0x9cfc12e4) reference count 1, flags 0x0, source rib (5), 0 backups
                [2 type 3 flags 0x10101 (0x9d102bd8) ext 0x0 (0x0)]
  LW-LDI[type=3, refc=1, ptr=0x9d1fd5f8, sh-ldi=0x9d102bd8]
   via TenGigE0/2/0/3.290851, 4 dependencies, weight 0, class 0 [flags 0x8]
    path-idx 0 [0x9e0162e0 0x0]
    remote adjacency


    Load distribution: 0 (refcount 2)

    Hash  OK  Interface                 Address
    0     Y   TenGigE0/2/0/3.290851     remote         


RP/0/RP0/CPU0:CRS#sh route ipv6 2001:648:2ffc:1200::2

Routing entry for 2001:648::/32
  Known via "bgp 1241", distance 200, metric 0
  Tag 5408, type external
  Installed Dec  5 11:28:48.223 for 8w0d
  Routing Descriptor Blocks
    fe80::222:83ff:fe42:923d, from 2001:648:2100::1, via Unknown
      Route metric is 0
  No advertising protos. 

RP/0/RP0/CPU0:CRS#tr 2001:648:2ffc:1200::2

Type escape sequence to abort.
Tracing the route to 2001:648:2ffc:1200::2

 1   *  *  * 
 2   *  *  * 


Traffic for above network isn't forwarded at all...
shut/no shut of bgp neighbor usually solves the problem.

-- 
Tassos