[routing-wg] Annoucing supernets in BGP?
Wilfried Woeber Woeber at CC.UniVie.ac.at
Thu Sep 13 12:18:49 CEST 2012
Florian Weimer wrote: > * Michael Markstaller: > > >>Is it good/best practice for Swisscom to announce 80/5 into BGP ? > > > IIRC, Swisscom does this so that its customers can use routers which > are not capable of processing the original DFZ, and still have some > redundancy. The advertisements should not leak to the general > Internet. ...whatever the merits of such a setup may be, imho at least minimal precautions SHOULD be applied, e.g. attaching a "no-export" tag? > If the prefixes end up in RIS, this could come from leakage > by a Swisscom customer (and another upstream which doesn't filter > properly), or a misconfigured BGP peering for the RIS data feed. Wilfried