BGP *-valid status code

[nihal.akbulut]

Hi,

What exactly "*-valid" in bgp table means? What is checked before a route is signed with this code? Next-hop reachability or anything else?

thanks

[Harold Ritter]

The prefix is marked as valid if received from a peer or locally originated. The next hop reachability doesn't affect this flag.

Hope this helps,

[pkhatri]

Hi,

So what are the circumstances under which the prefix would not be marked as valid ?

Paresh.

[Harold Ritter]

When a path is dampened among other conditions. In such a case, the prefix is not received anymore from the peer. It is kept for the sake of conserving the history information and is not marked as valid.

Hope this helps,

[nihal.akbulut]

thanks for your useful info. Is there any document that explains this "validation" check process?

[Harold Ritter]

You can try the following document:

http://www.cisco.com/warp/customer/459/25.shtml

Hope this helps,