BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?'

Wed Sep 9 13:25:23 UTC 2020

>
> Well, the proposed de facto standard is only useful for what we need to
> signal outside of the AS.

That's not quite true.

See the entire idea behind defining a common mechanism for signalling
policy in communities in a flexible way for both intra and inter-domain use
is to help you to use the same encoding acros policy engines of many
vendors.

I would actually risk to say that it could be even more applicable
intra-domain then inter-domain.

See the crux of the thing is that this is not just about putting bunch of
type-codes into IANA reg. It is much more about uniform encoding for your
actions with optional parameters across vendors.

In fact the uphill on the implementation side is not because signalling new
value in BGP is difficult to encode ... it is much more about taking those
values and translating those to the run time policies in a flexible way.

Thx,
R.
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