RE: Is TI-LFA compatible with the default SR algorithm?

2018-06-14 Thread Alexander Vainshtein
: Michael Gorokhovsky ; draft-ietf-spring-segment-routing.auth...@ietf.org; spr...@ietf.org; rtgwg@ietf.org; draft-bashandy-rtgwg-segment-routing-ti-lfa.auth...@ietf.org Subject: Re: Is TI-LFA compatible with the default SR algorithm? On 14/06/2018 13:45, Alexander Vainshtein wrote: Please note

Re: Is TI-LFA compatible with the default SR algorithm?

2018-06-14 Thread Stewart Bryant
On 14/06/2018 13:45, Alexander Vainshtein wrote: Please note that RFC 5286 explicitly states that it is only applicable to intra-domain routing only with OSPF or IS-IS as IGP. It does not mention the possibility of local policies overriding shortest path routing provided by these

RE: Is TI-LFA compatible with the default SR algorithm?

2018-06-14 Thread Alexander Vainshtein
...@orange.com; Alexander Vainshtein ; draft-bashandy-rtgwg-segment-routing-ti-lfa.auth...@ietf..org Cc: Michael Gorokhovsky ; draft-ietf-spring-segment-routing.auth...@ietf.org; spr...@ietf.org; rtgwg@ietf.org Subject: Re: Is TI-LFA compatible with the default SR algorithm? RFC5714 was written when we

RE: Is TI-LFA compatible with the default SR algorithm?

2018-06-14 Thread Alexander Vainshtein
ane.litkow...@orange.com] Sent: Thursday, June 14, 2018 1:57 PM To: Alexander Vainshtein ; draft-bashandy-rtgwg-segment-routing-ti-lfa.auth...@ietf.org Cc: Stewart Bryant ; Michael Gorokhovsky ; draft-ietf-spring-segment-routing.auth...@ietf..org; spr...@ietf.org; rtgwg@ietf.org Subject: RE:

Re: Is TI-LFA compatible with the default SR algorithm?

2018-06-14 Thread Stewart Bryant
RFC5714 was written when we were focused on routing in base along normal Dijkstra shortest paths. As policy and flexible algorithms become prevalent we need to specify that any RFC5714 action is compliant to the policies and intended algorithms along the entirety of its path. We need to

RE: Is TI-LFA compatible with the default SR algorithm?

2018-06-14 Thread stephane.litkowski
Hi Sasha, Could you elaborate on :" I strongly suspect that it is not so, and that these mechanisms are only compatible with the Strict-SPF. (Actually, I can provide an example that confirms this suspicion.)" ? Thanks, From: spring [mailto:spring-boun...@ietf.org] On Behalf Of Alexander