Re: [spring] SR replication segment for P2MP MDT

[Gyan Mishra <[e-mail]>]

A follow up related question is let’s say you have a 100% migrated to
SR-MPLS and so any mLDP related PSMI UI/MI/S trees are not possible but you
can still I guess use IR or RSVP-TE.

You don’t want to use RSVP-TE and don’t want to use IR due to processing
replication overhead.

But if Tree SID instantiation only works with controller based model and
you have a distributed model deployment what options do you have and is
their any way you can use Tree SID instantiation using SR-TE with binding
SID.

Kind regards

Gyan

On Fri, Mar 20, 2020 at 9:40 PM Gyan Mishra <[e-mail]> wrote:

>
> Daniel & Authors
>
> I had a question related to the draft related to lab POC testing.
>
> https://datatracker.ietf.org/doc/draft-voyer-spring-sr-replication-segment/
>
> In the draft it states that SR replication using Tree SID to replication
> to leafs on a tree is only supported with a centralized PCE controller
> based model using BGP LS.
>
> I have an SR-MPLS Cisco VIRL POC test bed using XRV9000 nodes 7.0.1 using
> ISIS SR extensions where I have L3 vpn overlay and everything is working
> very well from a unicast perspective.  No issues.
>
> I have LDP still enabled but via “SR-Prefer” am using SR-MPLS forwarding
> plane.  I kept LDP enabled so I can use mLDP for LMDT label switched trees
> for multicast and technically that all MVPN procedures RFC 6513 6514 encap
> tunnel types should work for p-tree using mLDP forwarding plane for
> multicast while SR-MPLS is being used for unicast.
>
> I can get the LMDT core tree default and data mdt to build for MP2MP or
> P2MP tree but cannot get on the FEC root the MRIB state to build.  Not sure
> why?
>
> Any ideas.  Is there anything special I have to do for multicast to use
> the ldp mLDP extension data plane and not the SR-MPLS data plane.
>
> I think what’s happening is at the data plane forwarding level SR-MPLS
> data plane is being used instead of mLDP.
>
> I have a bunch of SR-TE policies in place with candidate dynamic and
> static ERO paths and that works well coloring the VRF steering.
>
> I was wondering if I can use SR-TE binding Sid with Static ERO loose path
> using prefix SID of egress PE to replicate to and build P2MP tree
> instantiation via SR-TE.
>
> Is that possible?
>
> Kind regards
>
> Gyan
>
>
> --
>
> Gyan  Mishra
>
> Network Engineering & Technology
>
> Verizon
>
> Silver Spring, MD 20904
>
> Phone: [phone]
>
> Email: [e-mail]
>
>
>
> --

Gyan  Mishra

Network Engineering & Technology

Verizon

Silver Spring, MD 20904

Phone: [phone]

Email: [e-mail]