Palo Alto BGP: Conditional Advertising

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Palo Alto BGP: Conditional Advertising

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:

Many Thanks and Regards,

David Vassallo



L4 Transporter

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



L2 Linker

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.

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