OK. Sounds good. Rgds Shraddha
-----Original Message----- From: Peter Psenak [mailto:ppse...@cisco.com] Sent: Wednesday, December 17, 2014 3:47 PM To: Shraddha Hegde; rob.sha...@bt.com; draft-ietf-ospf-segment-routing-extensi...@tools.ietf.org Cc: ospf@ietf.org; isis...@ietf.org Subject: Re: draft-ietf-ospf-segment-routing-extensions-03 Shraddha, On 12/17/14 09:51 , Shraddha Hegde wrote: > <Shraddha> Lets say set S1 has some characteristic "X" and set S2 has > characteristic "Y". > Lets say we want to build explicit routed label stack which says " give me > load balancing path using links with characteristic X". > > Lets say there is another set of nodes R3 and R4 and similar S1 and S2 > bundles on them and R3 advertising label 30 and 40 for S1 and S2 > Respectively. Labels are local to the nodes and we cannot use labels to > identify what characteristic or set they stand for. > > To satisfy the constraint whether to use label 10 > Or 20 on R1 and whether to use 30 or 40 is a problem. The application which > is trying to build the label stack cannot identify which label to use from R1 > and R3 because there are sets and labels but which label > Represents which set is missing. > If there is an identifier for the set and this identifier comes with label it > can be done easily. If I understand you correctly, what you want to color links based on the link characteristics - e.g. you want to associate link with a group (color) and group (color) to have global significance. Sure, you can do that, but I do not see a direct relationship to SR, e.g. I would not add the group-id to the Adj-SID sub-TLV. You can define a new sub-TLV for the group-id distribution and advertise it in the Extended link TLV. thanks, Peter _______________________________________________ OSPF mailing list OSPF@ietf.org https://www.ietf.org/mailman/listinfo/ospf
