Comments on: OSPF down bit and domain tag

By: Kelvin.H

Kelvin.H — Wed, 09 Dec 2009 19:20:58 +0000

base on your implementation above, and then use the “capability vrf-lite” command, you’ll see that “O E2″ routes(100.100.100.1) will turn back into “B” and I can explain reason why.

By: Ahenning

Ahenning — Sat, 21 Nov 2009 15:25:31 +0000

Scott, I take it you meant set the domain-id to NULL.

By: Zarar

Zarar — Thu, 19 Nov 2009 17:33:19 +0000

Thanks for sharing the tip with us Scott.

By: Scott Morris

Scott Morris — Mon, 16 Nov 2009 14:47:23 +0000

Good write-up. As a note, you can also (instead of using capability vrf-lite) reset the domain-tag to NULL and things will work as well.

By: MOHAMMED IMRAN KHAN

MOHAMMED IMRAN KHAN — Thu, 10 Sep 2009 09:45:47 +0000

Who said Type 5 LSAs do not contain options field in the header. It does have a 8 bit field.

By: Amit

Amit — Tue, 08 Sep 2009 04:45:50 +0000

Very nicely done.

By: shivlu jain

shivlu jain — Tue, 24 Mar 2009 17:37:13 +0000

good one : )

regards
shivlu jain

By: Zarar

Zarar — Thu, 26 Feb 2009 05:42:36 +0000

There are a few more things I will post when I get time about the OSPF down bit and domain tag. ie when using vrf-lite the router thinks it is a PE and as such checks incoming ospf packets for the OSPF down bit or domain tag. If either are present then the router drops the packets. To get out of this situation you have to instruct the router that it is not a PE using the command “capability vrf-lite” under the PE. these two checks are then turned off.

I’ll post a video to clarify when I get a chance.

Zarar

By: Keith Tokash

Keith Tokash — Wed, 25 Feb 2009 22:33:48 +0000

Nice presentation of a relatively obscure topic.