ISIS - multi-topology IPv6

[gargolek99]

Hello,

Does anyone ever seen this kind of message when configured ISIS multi-topology with support of IPv6?

The message i see is "Remote TID: 0, 2(parallel adjacency suppressed)" I was trying to research that by "google" nothing found. Any one can explain this?

System Id      Type Interface   IP Address      State Holdtime Circuit Id
R7             L2   Se1/2       192.168.1.146   UP    21       00
  Area Address(es): 03
  SNPA: *HDLC*
  IPv6 Address(es): FE80::C801:1CFF:FEAC:8
  State Changed: 09:15:04
  Format: Phase V
  Remote TID: 0, 2(parallel adjacency suppressed)
  Local TID:  0, 2
  Interface name: Serial1/2
R5             L2   Se1/0       192.168.1.137   UP    24       01
  Area Address(es): 02
  SNPA: *HDLC*
  IPv6 Address(es): FE80::C807:1EFF:FEBC:8
  State Changed: 09:24:44
  Format: Phase V
  Remote TID: 0, 2
  Local TID:  0, 2
  Interface name: Serial1/0
R10            L1L2 Se1/1       192.168.1.141   UP    22       00

[AFROJ AHMAD · Accepted solution]

Hi ,

What I found is "

If there are parallel adjacencies to the same neighbor (on different interfaces) normal
IS-IS behavior is to suppress the advertisement of the additional adjacencies unless TE is
enabled. This redundant information is not needed in order to correctly run SPF.
Indication that the adjacency has been suppressed.

This should not be a cause of concern as it has no operational impact.

 there is an Internal BUG for the same :

IS-IS Advertises Parallel Adjacencies when TE is NOT enabled

CSCum06418

Thanks-

Afroz

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[gargolek99]

Hello,

Thank you for your findings, however this is really casing issue on my IPv6 routing, i see routes on R6 but those routes are not propagated to other L2 in same Area nor outside of the area, casing everything behind R7 not visible...? How i can enable TE or how can i force SPF to run on those interfaces?

Regards,

[AFROJ AHMAD]

It's enabled by default and can't be turned off

[gargolek99]

Hello,

It seems this issue goes away after i shut isis on interfaces affected and i have waited for database to flushed out all reminded lsp. After that i turn isis back on interface and all become functioning as it should. I am using software simulation maybe there is some issue with that.

Regards,