hi Stefano and other SR-ISIS authors, I have some questions when study draft-ietf-isis-segment-routing-extensions-03
1) for Prefix-SID Sub-TLV It seems that we cannot support Prefix-SID Propagation with local label inside the level, because each node cannot change the received flooding information such as the label value before it propagate again, otherwise packet inconsistency will occur in some remote nodes. So, the only way to create the SR LSP inside the level is to advertise prefix-sid with INDEX type. Another way may directly advertise global label, but it's not appropriate for distribution network. In the case of propagation between levels, although in the document it says the level-1-2 router can change the flooding information, but the same problem is there, the total SR LSP can not be building with local label advertisement. Is it right? 2) for Adj-SID Sub-TLV In the document is says that an adjacency-sid can set the S-flagļ¼but it is possible that an adjacency can join many adjacency group. It is difficult for the ingress node to process the received Adj-SID Sub-TLV for the same specific remote adjacency with different adjacency-sid value with S-flag set, whether adj-sid 200 can overwrite adj-sid 100 or they indicate different groups? It seems that we need add ADJACENCY-GROUP-NAME information in the Adj-SID Sub-TLV. Is it right? Regards, deccan -------------------------------------------------------- ZTE Information Security Notice: The information contained in this mail (and any attachment transmitted herewith) is privileged and confidential and is intended for the exclusive use of the addressee(s). If you are not an intended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information contained is strictly prohibited. If you have received this mail in error, please delete it and notify us immediately. -------------------------------------------------------- ZTE Information Security Notice: The information contained in this mail (and any attachment transmitted herewith) is privileged and confidential and is intended for the exclusive use of the addressee(s). If you are not an intended recipient, any disclosure, reproduction, distribution or other dissemination or use of the information contained is strictly prohibited. If you have received this mail in error, please delete it and notify us immediately.
_______________________________________________ spring mailing list [email protected] https://www.ietf.org/mailman/listinfo/spring
