Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements
Webcast-Catalyst9k
New Member

BGP Path Filtering

I'm trying to filter a backup default route from being advertised to an eBGP neighbor. Under normal operations, Router A advertises a default route to Router C. Router A receives a backup default route from Router B via eBGP. Router C receives a default route from A and a backup default route from B - both via eBGP. I am trying to prevent the backup default route from being advertised from A->C during a failover. Can I use AS Path Filtering to filter the following path:

[100 200 ?]

or can I not match the ? in the as-path?

1 REPLY
Silver

Re: BGP Path Filtering

I will advice that you use BGP communities. You could tag the default route that you do not want exported with the well known community no-export.

95
Views
0
Helpful
1
Replies
CreatePlease to create content