on 23.12.2011 01:08 robert jakub wrote:
On Dec 22, 2011, at 1:56 PM, Ondrej Zajicek wrote:
The idea of a route server is that it "... reduces modifications to advertised route attributes to be transparent (for example does not prepend its AS number to AS PATH attribute and keeps MED attribute)."
However in case that there is a BGP speaker (gateway GW ) which is in the same ASN as the RS it is at least necessary to add the own ASN when announcing prefixes originating in the ASN.
Hence I would like to propose to modify
do not prepend own AS number
to
do not prepend owwn AS number except for prefixes learnt from iBGP
Does that make sense?
Yes, it does make sense to me, because it is consistent with the current behavior on local (i.e. non-BGP) routes exported to BGP RS session.
Note that there is a draft on RS behavior, which does not mention this: http://tools.ietf.org/html/draft-jasinska-ix-bgp-route-server-03
but can it be optional, not required (eg: with some command to revert to old behavior)
I would propose to do it the other way round if the proposed behaviour would be implemented. I.e. make the old behaviour an option. Best regards, Arnold -- Arnold Nipper / nIPper consulting, Sandhausen, Germany email: arnold@nipper.de phone: +49 6224 5593407 2 mobile: +49 152 53717690 fax: +49 6224 5593407 9