Re: [bess] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

2021-07-20 Thread Shraddha Hegde
Good to know the intention is to support fallback for Srv6. The way current text is written, it implies service SID is always in the destination address. And hence service SID should be resolvable. This is not the case when a service SID Corresponding to flex-algo wants to fallback on best

Re: [bess] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

2021-07-20 Thread UTTARO, JAMES
Comments In-Line.. Thanks, Jim Uttaro From: spring On Behalf Of Shraddha Hegde Sent: Tuesday, July 20, 2021 5:56 AM To: Robert Raszuk Cc: spr...@ietf.org; bess@ietf.org Subject: Re: [spring] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07) Good to know the in

Re: [bess] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

2021-07-20 Thread Robert Raszuk
Jim, The "policy" I had in mind was a simple cfg switch "fallback global" for any SRv6 service originally set to say run over different IGP topology. Or perhaps if more then two options are available, list the chain of forwarding tables/topologies to be used as transport for a given SRv6 service.

Re: [bess] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

2021-07-20 Thread Aissaoui, Mustapha (Nokia - CA/Ottawa)
Hi Shraddha, An implementation can allow any fallback strategy, including multiple levels of fallback, but the backup path you are describing is simply the general behavior of a SRv6 policy. The End SID is part of the SRv6 policy segment list and is the top SID. So, the service SID will indeed b

Re: [bess] [spring] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

2021-07-20 Thread Srihari Sangli
Mustapha, I think Shraddha is pointing about the paragraph “When providing best-effort connectivity…” where it specifically talks about fallback to best-effort and if so, perform the resolvability check on the service-SID. Going by what you are saying that its general behavior of SRv6 policy, t

Re: [bess] [spring] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

2021-07-20 Thread Aissaoui, Mustapha (Nokia - CA/Ottawa)
Hi Srihari, I am not able to find the text about fallback in the version 07 of the draft. I may have misunderstood but I thought Shraddha was proposing new text to cover fallback in the draft. The draft refers to “SRv6 service with best-effort connectivity” and to “SRv6 service in conjunction w

Re: [bess] [spring] SRv6 BGP based Overlay Services (draft-ietf-bess-srv6-services-07)

2021-07-20 Thread UTTARO, JAMES
Comments In-Line.. Thanks, Jim Uttaro From: spring On Behalf Of Aissaoui, Mustapha (Nokia - CA/Ottawa) Sent: Tuesday, July 20, 2021 1:14 PM To: Srihari Sangli ; Shraddha Hegde ; Robert Raszuk Cc: spr...@ietf.org; bess@ietf.org Subject: Re: [spring] SRv6 BGP based Overlay Service