[c-nsp] IS-IS Emergency

[Rodney Dunn]

Justin,

The TAC engineer that had your TAC case on this originally sits
beside me. :) Isn't it the same issue?

Did you reconfigure the L1/L2 routers such that your L1/L2 to
L2 upstream peer is in a different area?

Rodney

On Wed, Jun 20, 2007 at 08:09:42AM -0500, Justin Shore wrote:
> 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
> 
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