BGP Community Support WAS: Re: Cogent vs. HE ; -) WAS: Anyone using Cogent Ethernet
clinton at scripty.com
Tue Jan 23 21:15:35 UTC 2018
BGP communities I use the most:
- Influence the transit provider BGP local-preference: customer preferred, customer backup, peer, and transit LP values
- Only advertise routes to the transit provider customers and not their peers
- Don't advertise routes to transit providers' peer ASx.
- AS-prepend X times to transit providers' peer ASx.
I've had a couple of situations where a CDN provider is sending all their traffic via one transit provider. A BGP community to not advertise or as-prepend our routes to that CDN provider would have been handy. Most transit providers only allow you to not advertise or as-prepend to their peers and not other customers.
On Tue, Jan 23, 2018, at 12:17 PM, James Breeden wrote:
> I've seen the onestep list but the presentation is helpful. I guess my
> question was moreso to the people side of communities vs the
> technicalities of communities - what ones do people find themselves
> using most often and what do they wish was available from providers that
> really isn't otherwise out there?
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