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Re: Global BGP community values?

  • From: Alex P. Rudnev
  • Date: Tue Oct 05 05:53:13 1999

>From mthe side of PRAGMATIC, such communities should be very usefull if 50
- 70 % of the big ISP follow them. It's possible only if this can be
realised by existing control schemas (such as route-maps in CISCO), and
should be easily if router vendors (just the CISCO again -:)) incorporate
it as the embedded rules (just as NO_EXPORT this days - you can realise
this behaviour by route-map, but usially you use embedded rules). 

It's just this year when most big ISP began to use such communities inside
their own networks (or may be - 2 years: TELIA - this year; UUnet - last
year; MCI - a few years; most Russion ISP, for example - 2 pr 3 years).
But until now it is LOCAL communities - you can't decrease localpref
GLOBALLY; and it caused the trigger effect in some cases. The first step
should be some _VERY SIMPLE_ draft proposing new GLOBAL communities.

On Tue, 5 Oct 1999, Peter Galbavy wrote:

> Date: Tue, 5 Oct 1999 10:15:06 +0100
> From: Peter Galbavy <[email protected]>
> To: Hank Nussbacher <[email protected]>
> Cc: Vadim Antonov <[email protected]>, [email protected]
> Subject: Re: Global BGP community values?
> On Tue, Oct 05, 1999 at 10:32:02AM +0200, Hank Nussbacher wrote:
> > I agree but then why didn't your draft make it to BCP or experimental RFC
> > status?  Perhaps if we do the community thing and demonstrate that there is
> > a real world benefit, then we can revive your RFC draft and integrate the
> > knowledge we gain into something that gets accepted and implemented a bit
> > later on.
> Without wanting to enter into the pleasant politics that surround
> "correctness" versus "pragmatism", I woule like to fall down on the
> side of pragmatism in this case. It would take very little effort and
> no protocol change to document a proposal with some standard
> convenience values that can be seen as an informally agreed set of
> global community values.
> Apart from an "always prefer this route if found" set of known values,
> what others could be useful ? I know that some networks (EBONE from
> memory) uses communities to stop exports at borders to certain
> networks. Would there be any value is have a standardised way of
> saying things like "don't export outside country/continent please" -
> the request being understtod to be a courtesy request rather than a
> demand ?
> Regards,
> -- 
> Peter Galbavy
> Knowledge Matters Ltd

Aleksei Roudnev, Network Operations Center, Relcom, Moscow
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