Re: [spring] Spring protection - determining applicability

2020-08-28 Thread Chengli (Cheng Li)
Hi Sasha, Agree. This is not the topic about to adopt a draft or not. I also support the adoption. :) Regarding the not bypassable flag for prefix SID, thanks for your input. Will update the draft after we have enough discussion in the mailing list. Seems like we are heading to the same direct

Re: [spring] to drop or to forward unlabelled (Re: Question on RFC8660)

2020-08-28 Thread Jakob Heitz (jheitz)
It all hinges on "useable next hops". If the connected next hop (a bgp next hop may not be connected) has a correct route for the packet, then it is useable. One more consideration: With the BGP free core, external devices cannot send packets to your internal routers. Once you allow to forward pac

Re: [spring] to drop or to forward unlabelled (Re: Question on RFC8660)

2020-08-28 Thread Martin Horneffer
Hi PSF, limiting the "forward unlabelled" behavior to packets with the bottom-of-stack bit set is an interesting idea. I haven't though about that yet. In my case that would definitely help and be perfectly ok. Best regards, Martin Am 28.08.20 um 05:31 schrieb peng.sha...@zte.com.cn: Hi

Re: [spring] to drop or to forward unlabelled (Re: Question on RFC8660)

2020-08-28 Thread Martin Horneffer
Hi Robert, the setup I sketched does not cover double failures nor 100 % of all topological cases for forwarding. And in fact, forwarding the traffic is not the main purpose. The main purpose it to DETECT the failure in a useful way. For the same reason we would sure not want to add yet anoth

Re: [spring] Spring protection - determining applicability

2020-08-28 Thread Alexander Vainshtein
Cheng and all, A few short comments. 1. I support the idea to mark some IGP Prefix SIDs as "not bypassable" 2. I think that, while such marking is not yet available the neighbors of a node that advertises itself as a "stub node" in IGP MAY use this as a hint that Node SIDs advertised by