[j-nsp] BGP advertise-inactive (even not the *best* BGP route)

[Richard A Steenbergen]

On Thu, Aug 19, 2004 at 02:27:45PM -0700, Paul Goyette wrote:
> Well, 
> 
> Whereas, BGP advertises a set of path attributes and a list
> of prefixes to which that set of attributes applies, _and_ 
> 
> Whereas, BGP protocol spec says that if a prefix is later 
> associated with a new set of path attributes then the new set 
> replaces the old set,
> 
> How would you propose that we associate a single prefix with
> more than one set of attributes?

Not such much useful for regular routing (pretty darn useless in fact, you 
couldn't make a best path decision which is different from your uplink 
device's forwarding table anyways) as it is for external analysis tools.

I'll agree with you that it would be slightly tricky to implement (you 
would have to look at some external info like next-hop, and keep your own 
state, to determine if it is a new nlri or a replacement), but it sure as 
hell beats the current options like snmp and cli for doing data 
collection.

-- 
Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)