Hi Bruno, From: "bruno.decra...@orange.com<mailto:bruno.decra...@orange.com>" Date: Wednesday, October 7, 2015 at 5:43 PM To: Pushpasis Sarkar, "Stefano Previdi (sprevidi)" Cc: Hannes Gredler, "spring@ietf.org<mailto:spring@ietf.org>", Isis-wg, Imtiyaz Mohammad, "Clarence Filsfils (cfilsfil)" Subject: RE: [Isis-wg] Handling same SID mapped to different prefixes and vice versa cases
BTW, draft-ietf-isis-segment-routing-extensions does not explicitly state whether this is allowed or not (to advertise Special Purpose MPLS labels (aka Reserved labels)). My personal reading is that since this is not forbidden, then this is allowed. [Pushpasis] That is exactly what I (and probably Imtiyaz too) wanted the authors to confirm and if possible explicitly spell out in the next version (we expect that draft should specifically spell out that same node-sid can be associated with multiple prefixes originated by the same node.. But not with same or different prefixes originated from different nodes). Otherwise implementations may interpret this in other way and expect all prefixes (even originated by the same node) to have separate index associated and if they receive two or more prefixes form same node with same index they might throw and error and not install the label push for the rest of the prefixes (i.e. program it for only the first prefix learnt). Thanks -Pushpasis
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