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Re: BGP communities usage for route origin, entry point

  • From: Stephen J. Wilcox
  • Date: Wed Jun 19 04:14:23 2002

Certainly do.. debugging and analysis yes, the communities also determine
what we announce to who eg if its tagged as a peer route dont announce to
other peers

Our customers also like them as they can make decisions about our routes
without the benefit of all the BGP info such as next hop exit point from
our network


On Tue, 18 Jun 2002, Thomas Kernen wrote:

> This started off as me being curious as to why a UUNet engineer I was
> talking to told me he could not understand why a network would support a
> feature such as BGP communities for identifying the origin of a
> route/network entry point. I tried to explain to him the advantage of being
> able to quickly identify where a route originates from (geographically),
> type of interconnect, type of "peer" (in this case I use peer for any BGP
> peer, customer or transit). I explained that it could be usefull for
> debugging and gaining more background info (route analysis is one of my
> favorite tasks) and some of the major and minor networks do provide such a
> feature/service.
> Still the engineer could not understand why and only saw this as a security
> issue, well I guess when you work for a network that does not provide any
> public looking glass or route server it's not really a surprise </rant>
> This triggered a thought, do many people actually use BGP communities to
> pinpoint a route origination point/type, and if so for what purpose
> (debugging, analysis, other)
> Thomas
> PS: If UUNet do actually support this feature please tell me who I should
> contact.

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