Communities BCP [was: RE: BGP Path Filtering]

Richard A Steenbergen ras at
Fri May 16 22:16:16 UTC 2003

On Fri, May 16, 2003 at 11:01:16PM +0100, Stephen J. Wilcox wrote:
> Hmm.. assuming you're interconnecting at multiple points with the same
> ASN they will probably want to indicate to you where to send traffic to
> them using MEDs, if you go stripping them out you lose that info, check
> the peering policy.. this may put you in breach.
> Even without a breach of policy the MED will help find the best path to
> a route thats identical at two points and if you take it out you lose
> that.

Practical implementation note:

The vast majority of the internet is completely incapable of setting 
correct MEDs. Even if they wanted to, it is often technical impossible due 
to aggregation. Realistically, MEDS usually break more than they help. If 
you want to improve connectivity, peer more.

Richard A Steenbergen <ras at>
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)

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