Re: [Lsr] draft-ietf-isis-mpls-elc-07

2019-09-04 Thread stephane.litkowski
Hi Uma, There was a discussion on this topic. I think this was agreed during Chicago's IETF if I remember correctly. The outcome of the discussion was that if an implementation is able to read N labels, this does not mean that it is actually able to hash based on these N labels. So we needed

Re: [Lsr] IPR Poll for "Signaling Entropy Label Capability and Entropy Readable Label-stack Depth Using OSPF" - draft-ietf-ospf-mpls-elc-08 (Updated Subject)

2019-08-30 Thread stephane.litkowski
I’m not aware of any IPR From: Acee Lindem (acee) [mailto:a...@cisco.com] Sent: Friday, August 30, 2019 21:10 To: draft-ietf-ospf-mpls-...@ietf.org Cc: lsr@ietf.org Subject: IPR Poll for "Signaling Entropy Label Capability and Entropy Readable Label-stack Depth Using OSPF" -

Re: [Lsr] IPR Poll for "Signaling Entropy Label Capability and Entropy Readable Label Depth Using IS-IS" - draft-ietf-isis-mpls-elc-07

2019-08-30 Thread stephane.litkowski
I’m not aware of any IPR From: Acee Lindem (acee) [mailto:a...@cisco.com] Sent: Friday, August 30, 2019 21:11 To: draft-ietf-isis-mpls-...@ietf.org Cc: lsr@ietf.org Subject: IPR Poll for "Signaling Entropy Label Capability and Entropy Readable Label Depth Using IS-IS" -

Re: [Lsr] WGLC: draft-ietf-isis-yang-isis-cfg (and remaining IPR replies)

2019-07-30 Thread stephane.litkowski
I'm not aware of any IPR related to this document. -Original Message- From: Christian Hopps [mailto:cho...@chopps.org] Sent: Monday, July 29, 2019 19:22 To: lsr@ietf.org Cc: Christian Hopps; lsr-cha...@ietf.org; lsr-...@ietf.org; draft-ietf-isis-yang-isis-...@ietf.org Subject: WGLC:

Re: [Lsr] Dynamic flow control for flooding

2019-07-24 Thread stephane.litkowski
Les, Can’t we use from a transmitter point of view, the lack of ACKs from the receiver as a signal that the transmitter should slow down ? I agree that depending on the exact bottleneck/issue, the IS-IS stack of the receiver may not be aware that something bad is happening and can’t provide

Re: [Lsr] Dynamic flow control for flooding

2019-07-23 Thread stephane.litkowski
Hi Les, I agree that flooding is a global thing and not a local mechanism if we consider that the ultimate goal is to get the LSDB in-sync as fast as we can on all the nodes. I just want to highlight three things: - Link delay (due to transmission link distance) is already affecting

Re: [Lsr] AD Review of draft-ietf-isis-yang-isis-cfg-35

2019-06-27 Thread stephane.litkowski
Hi Alvaro, Thanks for your comments. We are working on updating the document accordingly. Please find some replies inline that may require more discussion. I have stripped the comments that will be fixed in the next revision. Brgds, From: Alvaro Retana [mailto:aretana.i...@gmail.com] Sent:

Re: [Lsr] WG Adoption Call: draft-ginsberg-lsr-isis-invalid-tlv

2019-06-13 Thread stephane.litkowski
Support -Original Message- From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Christian Hopps Sent: Wednesday, June 12, 2019 14:05 To: lsr@ietf.org Cc: lsr-cha...@ietf.org; lsr-...@ietf.org; Christian Hopps; draft-ginsberg-lsr-isis-invalid-...@ietf.org Subject: [Lsr] WG Adoption Call:

Re: [Lsr] A question on the parameter overriding in draft-ietf-isis-yang-isis-cfg

2019-06-12 Thread stephane.litkowski
Hi Xufeng, Good catch, I think there is a mistake here, the expected behavior is the one described in the draft. We should not use a default value for the level-x leaves. Will fix it in the next release as part of the AD review. Brgds, Stephane From: Lsr [mailto:lsr-boun...@ietf.org] On

Re: [Lsr] I-D Action: draft-ietf-isis-yang-isis-cfg-35.txt

2019-06-07 Thread stephane.litkowski
Hi Tom, Thanks for your feedback. Pls find some comments inline Stephane -Original Message- From: tom petch [mailto:ie...@btconnect.com] Sent: Thursday, June 06, 2019 18:59 To: LITKOWSKI Stephane OBS/OINIS Cc: lsr@ietf.org Subject: Re: I-D Action: draft-ietf-isis-yang-isis-cfg-35.txt

Re: [Lsr] When to augment LSR base YANG modules...

2019-04-16 Thread stephane.litkowski
Hi, On one hand, I'm a bit worried about having too many tiny modules (finding the right module name to get the right feature, managing prefixes...). The good thing I see is that we could mandate in each LSR draft the YANG management part so both are published at the same time. While YANG is

Re: [Lsr] IPR Call for "YANG Data Model for IS-IS protocol" - draft-ietf-isis-yang-isis-cfg-29

2019-01-14 Thread stephane.litkowski
I’m not aware of any IPR From: Acee Lindem (acee) [mailto:a...@cisco.com] Sent: Saturday, January 12, 2019 23:21 To: draft-ietf-isis-yang-isis-...@ietf.org Cc: lsr@ietf.org Subject: IPR Call for "YANG Data Model for IS-IS protocol" - draft-ietf-isis-yang-isis-cfg-29 Authors, Are you aware of

Re: [Lsr] [yang-doctors] Yangdoctors last call review of draft-ietf-isis-yang-is-is-cfg-29

2019-01-09 Thread stephane.litkowski
Ok, so if we are silent about "must support at least", I think the only thing to do is to have 'type string "1.."' to avoid empty string as I don't see any requirement to have a minimum of x characters. -Original Message- From: Juergen Schoenwaelder

Re: [Lsr] [yang-doctors] Yangdoctors last call review of draft-ietf-isis-yang-is-is-cfg-29

2019-01-09 Thread stephane.litkowski
Hi Juergen, There is something that I'm missing (sorry for that). How defining a minimum length helps to deal with rogue input ? I see a rogue input more being a too long string. Too short can happen if a specific leaf really requires a minimum length string, but I don't think that we have

Re: [Lsr] Yangdoctors last call review of draft-ietf-isis-yang-is-is-cfg-29

2019-01-07 Thread stephane.litkowski
Hi Tom, Regarding the length enforcement for operational state leaves that are using string, do we need to always do it as a best practice ? There are plenty of strings with no enforcement today like the "non-best-reason" that you have pointed. Brgds, -Original Message- From: tom

Re: [Lsr] Yangdoctors last call review of draft-ietf-isis-yang-is-is-cfg-29

2019-01-07 Thread stephane.litkowski
Hi Tom, Thanks for your comments. I wish you an happy new year ! Please find inline comments. Brgds, -Original Message- From: tom petch [mailto:ie...@btconnect.com] Sent: Wednesday, January 02, 2019 12:17 To: LITKOWSKI Stephane OBS/OINIS; Ebben Aries; yang-doct...@ietf.org Cc:

Re: [Lsr] Shepherd's review of ietf-ospf.yang and draft-ietf-ospf-yang-17

2018-12-10 Thread stephane.litkowski
Acee and co-authors, The last version of the model has a compilation failed status in the YANG catalog. https://yangcatalog.org/results/ietf-ospf@2018-11-27_ietf.html Could you check what’s going on ? From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of stephane.litkow...@orange.com Sent:

Re: [Lsr] Shepherd's review of ietf-ospf.yang and draft-ietf-ospf-yang-17

2018-12-10 Thread stephane.litkowski
Hi Acee, I’m fine with that. From: Acee Lindem (acee) [mailto:a...@cisco.com] Sent: Friday, December 07, 2018 18:03 To: LITKOWSKI Stephane OBS/OINIS; lsr@ietf.org; draft-ietf-ospf-y...@ietf.org Subject: Re: Shepherd's review of ietf-ospf.yang and draft-ietf-ospf-yang-17 Hi Stephane, I’ve added

Re: [Lsr] draft-ietf-ospf-yang

2018-12-05 Thread stephane.litkowski
Hi Tom, I think that having a different router-id configured per protocol is a matter of deployment. I don't think that we can impose anything in this area. There are use cases where it is good to have separate router-ids per protocol or instances of a protocol. For instance, when a router is

Re: [Lsr] Shepherd's review of ietf-ospf.yang and draft-ietf-ospf-yang-17

2018-11-29 Thread stephane.litkowski
Hi Acee, In IS-IS some of the defaults we are using a coming from the ISO spec and some from vendor implementations (common used values). At the beginning we had no default in IS-IS, and during a review, there was a request to add defaults. I cannot remember who did this request. From: Acee

Re: [Lsr] Shepherd's review of ietf-ospf.yang and draft-ietf-ospf-yang-17

2018-11-28 Thread stephane.litkowski
Hi Acee, For the default values, some examples where I was expecting defaults: hello-interval, dead-interval, retransmit-interval, transmit-delay, passive, priority, cost… Another comment, in the last version of the IS-IS model, I have catched up all the existing IS-IS extensions in the LSDB

Re: [Lsr] Yangdoctors last call review of draft-ietf-isis-yang-isis-cfg-24

2018-11-27 Thread stephane.litkowski
Hi Tom, Thanks for your comments. I will fix them asap. Regarding: " Line length is within the RFC limit but the effect is to spread many of the description clauses over multiple lines with indentation of 56 characters, not user friendly e.g. description

[Lsr] Shepherd's review of ietf-ospf.yang and draft-ietf-ospf-yang-17

2018-11-21 Thread stephane.litkowski
Hi, Here are some comments I have on the model: · The model should use the LSR WG as point of contact and no more the OSPF WG · In the feature multi-topology: s/-Topolgy/-Topology · In the packet-type typedef: s/database-descripton/database-description. · In

Re: [Lsr] [spring] draft-ietf-isis-mpls-elc & draft-ietf-ospf-mpls-elc

2018-11-20 Thread stephane.litkowski
As mentioned, you could not be aware of all the constraints that we have and BGP 3107 is not an option. Note that this kind of redistribution can even happen within a single AS. We had some OSPF domain prefixes leaked in the ISIS L2 in the past in a single AS. Nothing prevents this design to

Re: [Lsr] [spring] draft-ietf-isis-mpls-elc & draft-ietf-ospf-mpls-elc

2018-11-20 Thread stephane.litkowski
We can’t for some internal design/security reasons. From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of ???(??) Sent: Tuesday, November 20, 2018 09:10 To: spring; Lsr; lsr@ietf.org Cc: spr...@ietf.org Subject: Re: [Lsr] [spring] draft-ietf-isis-mpls-elc & draft-ietf-ospf-mpls-elc Why not

Re: [Lsr] draft-ietf-isis-mpls-elc & draft-ietf-ospf-mpls-elc

2018-11-19 Thread stephane.litkowski
Hi all, The use case is without TE. And this is how network designs are working today, and I do not see any valid reason to complexify and change the existing designs by introducing controllers or BGP-LS. We have to accommodate with what is deployed today and the proposed change is quite

[Lsr] draft-ietf-isis-mpls-elc & draft-ietf-ospf-mpls-elc

2018-11-09 Thread stephane.litkowski
Hi WG, Some discussions occurred on the mailing list on how to encode the entropy label capability for SR but we hadn't found a consensus on the target solution. IETF 103 was the opportunity to meet face to face various people that have participated to this discussion. Following this

Re: [Lsr] Signalling ERLD (ISIS, OSPF and BGP-LS)

2018-06-13 Thread stephane.litkowski
Hi, As defined in draft-ietf-mpls-spring-entropy-label, advertising an ERLD means that the node is defacto ELC (so advertising ELC separately is not necessary): " The Entropy Readable Label Depth (ERLD) is defined as the number of labels a router can both: a. Read in an MPLS packet

Re: [Lsr] IPR Poll on draft-ietf-isis-segment-routing-extensions-16 (Shepherd write-up)

2018-06-12 Thread stephane.litkowski
I’m not aware of non-disclosed IPR. From: Lsr [mailto:lsr-boun...@ietf.org] On Behalf Of Uma Chunduri Sent: Monday, June 11, 2018 21:18 To: lsr@ietf.org Subject: [Lsr] IPR Poll on draft-ietf-isis-segment-routing-extensions-16 (Shepherd write-up) Dear All, Are you aware of any IPR that applies