nanog mailing list archives
Re: Devil's Advocate - Segment Routing, Why?
From: Mark Tinka <mark.tinka () seacom mu>
Date: Thu, 18 Jun 2020 00:23:22 +0200
On 17/Jun/20 23:07, adamv0025 () netconsultings com wrote:
First of all the "SR = network programmability" is BS, SR = MPLS, any programmability we've had for MPLS since ever works the same way for SR.
I see it the same way.
Yes anything that works for RSVP-TE (i.e. PCEP), if you want to play there's this free app on top of ODL(acting as PCEP+BGP-LS) to program LSPs (can't recall the name).
In short, more working and not the panacea it was made out to be. No problem with that, if you're one to roll your sleeves up.
"service chaining" = traffic-engineering, you can do that with or without SR just fine.
I don't make the terms up... best-of-breed and all that :-).
To service-chain DC or as hipsters call it "cloud" stuff. To TE path from VM to FW to ...whatever, or to TE mice flows around elephant flows.
And how many classic telco's are doing this at scale in a way that only SR can solve?
They do via telco cloud.
What's that :-)?
None, The same point I was trying to get across in our LDPv6 (or any v6 in control-plane or management plane for that matter) discussion, there's no problem to solve. Personally I'll be doing SR only in brand new greenfield deployments or if I start running out of RSVP-TE scale on existing deployments.
If I want to remove BGP state in the core (which is a good thing, given how heavy BGP code and FIB requirements are), LDPv4 and LDPv6 are useful for native dual-stack networks that do not share fate between either IP protocol. But, YMMV on that one :-). Mark.
Current thread:
- RE: Devil's Advocate - Segment Routing, Why?, (continued)
- RE: Devil's Advocate - Segment Routing, Why? adamv0025 (Jun 18)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 18)
- RE: Devil's Advocate - Segment Routing, Why? adamv0025 (Jun 18)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 18)
- RE: Devil's Advocate - Segment Routing, Why? adamv0025 (Jun 18)
- Re: Devil's Advocate - Segment Routing, Why? Robert Raszuk (Jun 18)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 18)
- Re: Devil's Advocate - Segment Routing, Why? Saku Ytti (Jun 18)
- Re: Devil's Advocate - Segment Routing, Why? James Bensley (Jun 30)
- RE: Devil's Advocate - Segment Routing, Why? adamv0025 (Jun 17)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 17)
- Re: Devil's Advocate - Segment Routing, Why? James Bensley (Jun 30)
- Re: [c-nsp] Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 17)
- Re: Devil's Advocate - Segment Routing, Why? Mark Tinka (Jun 30)