topic Re: Palo Alto BGP: Conditional Advertising in General Topics

Palo Alto BGP: Conditional Advertising

compunet_brianza — Thu, 04 Apr 2013 11:59:53 GMT

Dear All,

Recently we have been migrating to a non-trivial BGP setup, and I have had to experiment with the conditional advertising BGP feature in Palo Alto. I was familiar with this concept from cisco, but alas I still found the documentation available on this feature to be a bit unclear and lacking. So, I've written a how to with a step - by - step scenario in order to help the next person who comes along with the same questions I had.

I would be very appreciative if the community where to check the blog post here and give me their feedback / questions / mistakes that i've made, in order to better the article and hopefully even submit it as a document here on the paloalo knowledge point:

http://blog.davidvassallo.me/2013/04/04/palo-alto-networks-implementing-conditional-advertising-in-bgp/

Many Thanks and Regards,

David Vassallo

CNSE

Re: Palo Alto BGP: Conditional Advertising

kbrazil — Fri, 05 Apr 2013 16:10:36 GMT

Nice work - looks great. I hadn't thought to use conditional advertisements in this way before. Great use-case!

Cheers,

Kelly

Re: Palo Alto BGP: Conditional Advertising

khsieh — Wed, 26 Oct 2022 23:29:34 GMT

I found that article before finding this post. You can now monitor for the default route, which removes a limitation you mentioned.

The question I have is, can I make advertising a subnet conditional on the default route? I am thinking that it is possible that I didn't receive default route from my ISP for whatever reason, and then I don't want to advertise my public IP space to them. I know, kind of a weird problem, but just because I have an adjacency doesn't mean that all is well.