[c-nsp] CLNS/IS-IS routes
Peter Lothberg
roll at Stupi.SE
Mon Jan 14 11:39:02 EST 2013
> Hello all,
>
>
>
> We are currently troubleshooting an old, badly-documented, non-supported,
> CLNS/IS-IS network (for management of Alcatel NEs).
>
>
>
> One of the issues we have identified is IS-IS routes not being announced by
> one router to another (this might or might not explain the overall problem
> of no connectivity, but let=92s go step by step).
>
>
>
> The two routers are ALGiers and ORAn, directly connected with a serial E1
> link.
>
>
>
> The adjacency looks good to me. Algiers correctly sees Oran (and has a CLNS
> neighborship with the server we are interested in):
>
>
>
> ALG2-R26-01#sh clns ne
>
>
>
> System Id Interface SNPA State Holdtime Type
> Protocol
>
> 0007.729E.FFEE Et0/1 0007.729e.ffee Up 92 L1
> IS-IS
>
> 0007.72A2.FEA6 Et0/1 0007.72a2.fea6 Up 91 L1
> IS-IS
>
> 0020.602B.CBB4 Et0/1 0020.602b.cbb4 Up 95 L1
> IS-IS
>
> 0020.6013.2DD2 Et0/1 0020.604a.972e Up 92 L1
> IS-IS
>
> --> 0030.6E4B.455C Et0/1 0011.85c7.3ec0 Up 97 L1
> IS-IS <----- Server
>
> 0030.6E4B.47DB Et0/1 0012.799d.51a6 Up 95 L1
> IS-IS
>
> rtrnoc01 Et0/1 0014.1ce6.60fd Up 9 L1L2
> IS-IS
>
> rtrann01 Se0/2 *PPP* Up 24 L1L2
> IS-IS
>
> --> rtrora01 Se0/3 *PPP* Up 26 L1L2
> IS-IS <----- Oran router
>
> 1880.F524.8FF0 Et0/1 1880.f52d.958e Init 48 L1
> IS-IS
>
> ALG2-R26-01#
>
>
>
> Oran sees Algiers:
>
>
>
> ORA1-R26-01#sh clns ne
>
>
>
> System Id Interface SNPA State Holdtime Type
> Protocol
>
> 0020.6013.37F2 Fa0/1 0020.6013.37f2 Up 96 L1
> IS-IS
>
> --> rtrnal01 Se0/1/1:0 *PPP* Up 24 L1L2
> IS-IS <----- Algiers router
>
> rtralg01 Se0/1/0:0 *PPP* Up 28 L1L2
> IS-IS
>
> 0020.602B.CF8A Fa0/1 0020.602b.cf8a Up 46 L1
> IS-IS
>
> 0080.9F20.0931 Fa0/1 0080.9f20.03a3 Up 93 L1
> IS-IS
>
> ORA1-R26-01#
>
>
>
> But Oran does not seem receive from Algiers any of its 6 CLNS neighbors
> (and that includes the server):
>
>
>
> ORA1-R26-01#sh isis route | i 455C
>
> ORA1-R26-01#
>
>
>
> (You might have noticed that the CLNS names are not consistent with the
> hostnames, but CDP does confirm the situation
>
>
>
> ALG2-R26-01#sh cdp ne
>
>
>
> Device ID Local Intrfce Holdtme Capability Platform
> Port ID
>
> ORA1-R26-01 Ser 0/3 163 R S I Cisco
> 2801Ser 0/1/1:0
>
> (...)
>
> )
>
>
> All seven routers in the network have already been rebooted.
>
>
>
> Any idea why this inconsistency, or on how to troubleshoot further?
>
>
>
> Thanks,
>
>
>
> Vincent
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>
Send the output of:
sh isis database detail
>From all routers..
--P
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