[AusNOG] steering inbound BGP (Telstra)
mmc at mmc.com.au
Mon Feb 17 14:37:50 EST 2014
On 16 Feb 2014, at 7:15 pm, Joshua D'Alton <joshua at railgun.com.au> wrote:
> I could be wrong but BGP just doesn't support what you're wanting, and even more so no carrier is ever really going to work in the way you describe. It should never make sense (for a carrier) to not prefer their own routes (which are directly connected, ie admin dist 1), vs those of their peers (even if settlement free, admin dist 1+N), even if communities were involved (i believe telstra do use communities internally between telstra/telstraglobal/reach).
A lot of transit providers allow you to use communities to alter the localpref of your routes within their network so they prefer, for example, peers over directly connected.
eg. https://www.us.ntt.net/support/policy/routing.cfm with the 2914:4xx communities.
Telstra's AS1221 network is devoid of communities for customers though. They have been asked to provide them and just don't.
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