BGP TTL

[john heasley]

Wed, Mar 20, 2002 at 10:37:36PM +0200, Pekka Savola:
> On Wed, 20 Mar 2002, Martin, Christian wrote:
> > > Only if your neighbor listens to communities & does not strip any
> > > that they recieve.  [Someone at lunch mentioned one ISP that wanted
> > > a guarentee that their neighbor would not propogate some routes &
> > > did not want to rely on setting no-export as that breaks too often.]
> > 
> > Perhaps communities should become mandatory transitive attributes?  
> 
> Not sure if that's a good idea.  Communities can clash, and they often 
> only make sense if explicitly configured to do so.

no, it isnt a good idea, particularly if what is meant is that values
can not be deleted.  enforcing 65535:* to remain once added as well as
exchange of communities being mandatory might not be a bad idea though.

> It definitely doesn't sound good to accumulate all the communities from
> along the AS-PATH of e.g. length 10 at the last AS.
> 
> -- 
> Pekka Savola                 "Tell me of difficulties surmounted,
> Netcore Oy                   not those you stumble over and fall"
> Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords