Kals,
Some short answers reflecting my personal understandings
1. LSP Ping and Traceroute work just fine with SR-MPLS. Therefore on-demand OAM
is not a problem.
2. There are several options for proactive OAM in SR-MPLS, including usage of
Path Segments.
3. Prefix SIDs are NOT a replacement for BGP/MPLS IP VPNs.
Thumb typed by Sasha Vainshtein
________________________________
From: spring <[email protected]> on behalf of tech_kals Kals
<[email protected]>
Sent: Wednesday, March 6, 2019 5:56:35 AM
To: [email protected]; Stefano Previdi (sprevidi);
[email protected]; Ahmed Bashandy (bashandy); Les Ginsberg (ginsberg); Peter
Psenak (ppsenak); [email protected]; [email protected]
Subject: [spring] Questions on Segment Routing
Hi Experts,
I have few questions on Segment Routing. Can you please clarify my doubts.
1) How OAM can be done in segment-routed networks ?
I think, MPLS OAM is not possible with SR as network infrastructure
doesn't have any LSP state.
With SDN controller in place, do we really need traditional OAM ?
SDN controller can do OAM, but at what cost (like BGP-LS) ?
2) How will the traffic handoff happen from aggregate network to core network ?
core is running RSVP-TE, so IP handoff can be done on edge router ?
I don't think, SDN controller can control RSVP enabled routers. So, how it
is to make end-to-end TE i..e from Aggregate router to Core Router ?
3) can prefix sid be used to replace VRF in L3VPN scenario? (or any other way
in SR can avoid vrf ?)
Assume, on a router there are two interfaces. one is 10.1.1.0 VRF-1,
another one is VRF2-10.1.1.0.
Which SID should I use to differentiate them? Can I use, prefix SID in
this case ?
Is the below will work ?
Eth1 - VRF-1: 10.1.1.0 == Prefix SID: 1000
Eth2 - VRF-2: 10.1.1.0 == Prefix SID: 2000
4) How to handle multicast/broadcast using SR ?
5) SRv6 stacking ipv6 SRH might hit MTU limit somewhere in the network.
Is my understanding correct ?
6) Does VRRP work with SR ? how fault would be propagated in a necklace
topology?
7) Is there any known issues related to interop with different vendors ?
8) While programming Node-SID on MPLS ILM table, can I assume node-SID would
always be programmed with SWAP operation except on PHP node?
Thanks,
__kals__
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