[c-nsp] CLNS/IS-IS routes

[Peter Lothberg]

> 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