[c-nsp] IS-IS Emergency

[Justin Shore]

During maintenance last night we somehow lost the IS-IS default route on 
all our access edge routers.  The default is originated on 2 borders 
which are connected to a pair of 7613s.  The 7613s were propagating that 
default route to all the other IS-IS devices and to another POP.  We're 
one big L2 domain on all devices.  This worked perfectly until last 
night.  The edge devices are seeing the default (this can be seen in the 
database) but it is not being installed in the RIB for some reason.  Any 
ideas?

IS-IS Level-2 Link State Database:
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime      ATT/P/OL
7206-1.clr.00-00      0x00000157   0x2DF5        59275             0/0/0
   Area Address: 49.0010
   NLPID:        0xCC
   Hostname: 7206-1.clr
   IP Address:   10.64.0.1
   Metric: 100        IP 10.64.0.128/31
   Metric: 100        IP 10.64.0.130/31
   Metric: 100        IS-Extended 7206-1.clr.04
   Metric: 100        IS-Extended 7206-1.clr.03
   Metric: 0          IP 0.0.0.0/0
   Metric: 10         IP 10.64.0.1/32
   Metric: 10         IP 64.71.98.59/32
7206-1.clr.03-00      0x0000006C   0x809E        14112             0/0/0
   Metric: 0          IS-Extended 7206-1.clr.00
   Metric: 0          IS-Extended 7613-1.clr.00
7206-1.clr.04-00      0x0000006E   0xB655        10927             0/0/0
   Metric: 0          IS-Extended 7206-1.clr.00
   Metric: 0          IS-Extended 7613-2.clr.00

I'm manually installing static defaults to work around the problem.  I 
also noticed that Lo0 on the 2 borders are no longer being installed in 
each other's RIB.  There is general flakiness all around.  We're running 
SRB on the Sup720-3BXLs.

Thanks
  Justin