Re: [OSPF] Poll for WG adoption of draft-hegde-ospf-node-admin-tag
Peter Psenak <ppsenak@cisco.com> Tue, 26 August 2014 15:43 UTC
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Date: Tue, 26 Aug 2014 17:43:48 +0200
From: Peter Psenak <ppsenak@cisco.com>
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To: Hannes Gredler <hannes@juniper.net>
References: <D0212051.2116%acee@cisco.com> <53FC3FD8.1000704@cisco.com> <D022049C.2295%acee@cisco.com> <53FC9A02.4080401@cisco.com> <20140826153201.GA6179@juniper.net>
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Subject: Re: [OSPF] Poll for WG adoption of draft-hegde-ospf-node-admin-tag
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Hi Hannes, On 8/26/14 17:32 , Hannes Gredler wrote: > hi peter, > > operators want to assign node-tags as per router function (ABR, PE, core) and then > the LFA-selection becomes much easier to specify. - e.g. > - only pick a LFA that does not cross another PE router. > > similarily it is desirable for "LFA tunnel termination" > to put out a constraint which says > - only pick a PQ neighbor which has node tag 'X' my point is that with the above approach you have to: 1. On candidate PQ nodes configure the tag X 2. on all other nodes configure "only pick a PQ neighbor which has node tag 'X'" It's (2) which makes me feel uncomfortable, as it's a config to be applied to many nodes. If we instead define a capability bit which would mean "PQ candidate", we would avoid (2). > > i found it always strange that we for TE (as an example for > constraining paths) we have got ways to tag links, but > not way to tag nodes - that draft aims to fix that. I'm not against tagging nodes as such. What worries me if we end up using node tags for signalling capabilities of node. thanks, Peter > > HTH, > > /hannes > > On Tue, Aug 26, 2014 at 04:30:26PM +0200, Peter Psenak wrote: > | Hi Acee, > | > | On 8/26/14 15:45 , Acee Lindem (acee) wrote: > | >Hi Peter, > | >This is a valid concern and one that we¹ve discussed previously with > | >respect to routing behavior based on policies. I think that accepting this > | >draft as a WG document should not preclude standardization of capabilities > | >advertisement for popular applications. > | > | sure. Just that the draft mentions applications like "Controlling Remote LFA > | tunnel termination", which I'm not sure the node tag is the best approach > | for. > | > | thanks, > | Peter > | > | >Thanks, > | >Acee > | > > | >On 8/26/14, 4:05 AM, "Peter Psenak (ppsenak)" <ppsenak@cisco.com> wrote: > | > > | >>On 8/25/14 23:18 , Acee Lindem (acee) wrote: > | >>>There are situations where node level policy is required and an OSPF > | >>>advertised admin tag simplifies this. For example, advertisement of > | >>>remote-LFA eligibility. > | >> > | >>my concern with the generic use of admin tags for signaling capability > | >>is that it's operationally unfriendly compared to explicit signaling of > | >>the capability (e.g. using a bit or a TLV). The reason is that you have > | >>to configure the tag meaning on all receiving routers. > | >> > | >>thanks, > | >>Peter > | >> > | >>> > | >>>Please indicate your support or objections to adopting this draft as an > | >>>OSPF WG document. > | >>> > | >>>Thanks, > | >>>Acee > | >>> > | >>> > | >>>_______________________________________________ > | >>>OSPF mailing list > | >>>OSPF@ietf.org > | >>>https://www.ietf.org/mailman/listinfo/ospf > | >>> > | >> > | >>_______________________________________________ > | >>OSPF mailing list > | >>OSPF@ietf.org > | >>https://www.ietf.org/mailman/listinfo/ospf > | > > | >. > | > > | > | _______________________________________________ > | OSPF mailing list > | OSPF@ietf.org > | https://www.ietf.org/mailman/listinfo/ospf > . >
- [OSPF] Poll for WG adoption of draft-hegde-ospf-n… Acee Lindem (acee)
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Hannes Gredler
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Uma Chunduri
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Acee Lindem (acee)
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Hannes Gredler
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Hannes Gredler
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Anton Smirnov
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Hannes Gredler
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Les Ginsberg (ginsberg)
- [OSPF] 答复: Poll for WG adoption of draft-hegde-os… Lizhenbin
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Wunan (Eric)
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Shraddha Hegde
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Shraddha Hegde
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Uma Chunduri
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Karsten Thomann
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Dhruv Dhody
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… bruno.decraene
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Shraddha Hegde
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Rob Shakir
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Rob Shakir
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… bruno.decraene
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Hannes Gredler
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… bruno.decraene
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… bruno.decraene
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Dhruv Dhody
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Peter Psenak
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Hannes Gredler
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Anton Smirnov
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Dhruv Dhody
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Shraddha Hegde
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Acee Lindem (acee)
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Dhruv Dhody
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Xuxiaohu
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Jeff Tantsura
- Re: [OSPF] Poll for WG adoption of draft-hegde-os… Acee Lindem (acee)