Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-19 Thread Alexander Vainshtein
on behalf of adr...@olddog.co.uk Sent: Monday, November 19, 2018 3:08:52 PM To: 'Acee Lindem (acee)'; 'Dongjie (Jimmy)'; 'Les Ginsberg (ginsberg)'; 'Toerless Eckert'; lsr@ietf.org Subject: Re: [Lsr] LSR: Using DSCP for path/topology selection Q I think that this thread keeps mixing concepts. As Acee

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-19 Thread Les Ginsberg (ginsberg)
T. Les > -Original Message- > From: Acee Lindem (acee) > Sent: Monday, November 19, 2018 4:49 AM > To: Dongjie (Jimmy) ; Les Ginsberg (ginsberg) > ; Toerless Eckert ; lsr@ietf.org > Subject: Re: [Lsr] LSR: Using DSCP for path/topology selection Q > > Hi Jie

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-19 Thread adrian
routing which is, erm, something else altogether. Adrian -Original Message- From: Lsr On Behalf Of Acee Lindem (acee) Sent: 19 November 2018 12:49 To: Dongjie (Jimmy) ; Les Ginsberg (ginsberg) ; Toerless Eckert ; lsr@ietf.org Subject: Re: [Lsr] LSR: Using DSCP for path/topology selection Q

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-19 Thread Acee Lindem (acee)
s, Jie > -Original Message- > From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Les Ginsberg (ginsberg) > Sent: Thursday, November 15, 2018 12:41 PM > To: Toerless Eckert ; lsr@ietf.org > Subject: Re: [Lsr] LSR: Using DSCP for path/topology selectio

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-19 Thread Dongjie (Jimmy)
rg > Subject: Re: [Lsr] LSR: Using DSCP for path/topology selection Q > > Toerless - > > It's pretty hard to understand the context for your email. > > What leads you to believe that any of the MT specifications you mention say > anything normative about DSCP and topolo

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-19 Thread Dongjie (Jimmy)
To: Robert Raszuk Cc: t...@cs.fau.de; Les Ginsberg (ginsberg) ; r...@rob.sh; tony1ath...@gmail.com; lsr@ietf.org Subject: Re: [Lsr] LSR: Using DSCP for path/topology selection Q Robert, match DSCP X set context Y or plane Z doesn’t make it any different. It has been used and abused in any possible way

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-16 Thread Uma Chunduri
.org Subject: Re: [Lsr] LSR: Using DSCP for path/topology selection Q Robert, match DSCP X set context Y or plane Z doesn’t make it any different. It has been used and abused in any possible way. If you want to write a BCP saying - use it for X/Y/Z but not for A/B/C because of - your busi

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-16 Thread Toerless Eckert
On Fri, Nov 16, 2018 at 12:14:45AM -0800, Jeff Tantsura wrote: > P.S. in my previous life, working on 5G transport slicing (yes, i know :)) > - i needed per slice identity over the common transport, we ended up > looking at UDP port ranges, rather than DSCP - too few bits Right. The main issue is

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-16 Thread Toerless Eckert
Rob, Thats actually a good example, i had forgotten about that one. This is also a lot more scalable than MTR given how (if i remember correctly, you would only have O(#DSCP,#egres-PE) entries. Cheers Toerless On Thu, Nov 15, 2018 at 04:47:26PM -0800, Rob Shakir wrote: > On Thu, 15 Nov

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-16 Thread Jeff Tantsura
Robert, match DSCP X set context Y or plane Z doesn’t make it any different. It has been used and abused in any possible way. If you want to write a BCP saying - use it for X/Y/Z but not for A/B/C because of - your business. As to using it someplace else - I’d expect respective documents to

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-15 Thread Robert Raszuk
Jeff, > What architecture? > PBR is a form of: > match DSCP X > set next-hop Y > needs no interoperability... That's pretty narrow view. I could say the worst possible example :) You would have to either encapsulate or apply your sample config consistently on every hop. Br. To me DSCP can

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-15 Thread Tony Li
> On Nov 15, 2018, at 8:47 PM, Jeff Tantsura wrote: > > The question is really - what is here to standardize? There’s a fine architectural BCP here: this is how we are solving problem XYZ. Please don’t break this. Tony ___ Lsr mailing list

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-15 Thread Jeff Tantsura
+1 Rob I have seen number of MBH networks using DSCP to change forwarding - AKA PBR.. The question is really - what is here to standardize? RSVP-TE use cases mentioned by Rob (CBTS/PBTS in IOS realm) are classical examples of Policy Based Routing and as such are subject to implementation

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-15 Thread Rob Shakir
On Thu, 15 Nov 2018 at 16:07 Toerless Eckert wrote: > > And btw I read Peter's note as possibility (or invitation) to define > > algorithm which takes into account DSCP rather then a announcement that > > this is not there and it should never be. > > Sure, i am only talking about the solutions

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-15 Thread Toerless Eckert
; > > "It is assumed, but > > >outside the scope of this specification, that the network layer is > > > able to choose which topology to use for each packet" > > > > > > IGP WGs have never attempted to recommend (let alone normatively define

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-15 Thread Robert Raszuk
ine) > any relationship between DSCP and MT. > > > > ??? > > > >Les > > > > > -Original Message- > > > From: Lsr On Behalf Of Toerless Eckert > > > Sent: Wednesday, November 14, 2018 6:29 PM > > > To: lsr@ietf.org

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-15 Thread Toerless Eckert
From: Lsr On Behalf Of Toerless Eckert > > Sent: Wednesday, November 14, 2018 6:29 PM > > To: lsr@ietf.org > > Subject: [Lsr] LSR: Using DSCP for path/topology selection Q > > > > Whats the current best guidance on using DSCP for selection of path, > > specific

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-14 Thread Peter Psenak
Toerless, On 15/11/18 03:29 , Toerless Eckert wrote: Whats the current best guidance on using DSCP for selection of path, specifically for selection of topology with MTR (RFCs 4915, 5120, 7722) ? My understanding from history is that this looked like a good idea to customers first, but when

Re: [Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-14 Thread Les Ginsberg (ginsberg)
ber 14, 2018 6:29 PM > To: lsr@ietf.org > Subject: [Lsr] LSR: Using DSCP for path/topology selection Q > > Whats the current best guidance on using DSCP for selection of path, > specifically for selection of topology with MTR (RFCs 4915, 5120, 7722) ? > > My understanding from

[Lsr] LSR: Using DSCP for path/topology selection Q

2018-11-14 Thread Toerless Eckert
Whats the current best guidance on using DSCP for selection of path, specifically for selection of topology with MTR (RFCs 4915, 5120, 7722) ? My understanding from history is that this looked like a good idea to customers first, but when implementations became available, customers really did not