Re: [OSPF] regarding draft-ppsenak-ospf-te-link-attr-reuse-00
Peter Psenak <ppsenak@cisco.com> Wed, 13 January 2016 08:06 UTC
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Date: Wed, 13 Jan 2016 09:06:37 +0100
From: Peter Psenak <ppsenak@cisco.com>
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To: "xuling (F)" <xuling3@huawei.com>, "ospf@ietf.org" <ospf@ietf.org>
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Subject: Re: [OSPF] regarding draft-ppsenak-ospf-te-link-attr-reuse-00
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Ling, the fundamental flaw in your idea is that you are making the TE capability a node property, which is incorrect. TE topology is represented by links and as such needs to have per link granularity. regards, Peter On 1/13/16 08:58 , xuling (F) wrote: > Hi Peter, > > the mechanism in draft-ietf-ospf-rfc4970bis maybe highly expect to be used once well defined. If it works, we don't need to define a new mechanism to solve the first issue, maybe for new mechanism incompatible problem would also occur. > > > Best regards, > Ling > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 11 Jan 2016 08:33:12 +0100 > From: Peter Psenak <ppsenak@cisco.com> > To: "xuling (F)" <xuling3@huawei.com>, "ospf@ietf.org" <ospf@ietf.org> > Subject: Re: [OSPF] regarding draft-ppsenak-ospf-te-link-attr-reuse-00 > Message-ID: <56935AB8.5010202@cisco.com> > Content-Type: text/plain; charset=UTF-8; format=flowed > > Hi Ling, > > On 1/7/16 03:52 , xuling (F) wrote: >> Hi Acee, >> >> I suggest to advertise SRLG only in the TE opaque LSA, and advertise >> TE capability to help understand whether node is TE enabled. If node >> isn?t TE enabled , SRLG shouldn?t be used for TE application; >> otherwise, SRLG can be used for TE application or for other application purposes. > > above would be incompatible with the existing implementations, as there is no "TE capability" being used today. > > regards, > Peter > >> >> the mechanism to advertise TE capability has been well defined in >> draft-ietf-ospf-rfc4970bis. >> >> Best regards, >> >> Ling >> >> Hi Ling, >> >> From: OSPF <ospf-bounces@ietf.org<mailto:ospf-bounces@ietf.org >> <mailto:ospf-bounces@ietf.org%3cmailto:ospf-bounces@ietf.org>>> on >> behalf of "xuling (F)" <xuling3@huawei.com<mailto:xuling3@huawei.com >> <mailto:xuling3@huawei.com%3cmailto:xuling3@huawei.com>>> >> >> Date: Wednesday, January 6, 2016 at 2:28 AM >> >> To: OSPF WG List <ospf@ietf.org<mailto:ospf@ietf.org >> <mailto:ospf@ietf.org%3cmailto:ospf@ietf.org>>> >> >> Subject: [OSPF] regarding draft-ppsenak-ospf-te-link-attr-reuse-00 >> >> Hi, all >> >> To make the node that is not TE enabled advertises link attributes for >> other applications, it is worth considering another choice which has >> least change to the protocol and implementation. The method is: >> advertising RI capability TLV in RI LSA when advertising TE LSA. TE >> capability bit in RI capability TLV can indicate whether link >> attributes should become part of TE topology. >> >> In draft-ietf-ospf-rfc4970bis, >> >> ?an OSPF router advertising an OSPF RI LSA MAY include the Router >> Informational Capability TLV?? can be enhanced with: an OSPF router >> advertising an OSPF RI LSA should include Router Informational >> Capability TLV which can inform TE capability bit. >> >> In this case, some improvement needs to be done in >> draft-ietf-ospf-rfc4970bis. These are my personal view. >> >> The intent of RFC 4970 and the BIS version is that the drafts >> requiring new capabilities will define them and request IANA >> allocation as opposed to updating RFC 4970BIS for every new capability. >> >> As for the mechanism, I think this would be rather unwieldy to attempt >> to get SRLG information from different LSAs. Rather, within the OSPF >> Routing Domain, I?d choose to advertise SRLGs either in the TE LSAs or >> the Prefix/Link Attribute LSAs. >> >> Thanks, >> >> Acee >> >> Best regards, >> >> Ling XU >> >> ---------------------------------------------------------------------- >> -- >> >> xuling >> ????????Huawei Technologies Co., Ltd. >> Company_logo >> >> Phone: >> Fax: >> Mobile: >> Email: >> ??????????????? ???518129 >> Huawei Technologies Co., Ltd. >> Bantian, Longgang District,Shenzhen 518129, P.R.China >> http://www.huawei.com >> >> ---------------------------------------------------------------------- >> -- >> >> ???????????????????????????????????? >> ???? >> ???????????????????????????????????? >> ???? >> ??????????????????????????????????? >> This e-mail and its attachments contain confidential information from >> HUAWEI, which is intended only for the person or entity whose address >> is listed above. >> Any use of the >> information contained herein in any way (including, but not limited >> to, total or partial disclosure, reproduction, or dissemination) by >> persons other than the intended >> recipient(s) is prohibited. If you receive this e-mail in error, >> please notify the sender by phone or email immediately and delete it! >> >> >> >> _______________________________________________ >> OSPF mailing list >> OSPF@ietf.org >> https://www.ietf.org/mailman/listinfo/ospf >> > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > OSPF mailing list > OSPF@ietf.org > https://www.ietf.org/mailman/listinfo/ospf > > > ------------------------------ > > End of OSPF Digest, Vol 119, Issue 5 > ************************************ > > _______________________________________________ > OSPF mailing list > OSPF@ietf.org > https://www.ietf.org/mailman/listinfo/ospf > . >
- [OSPF] regarding draft-ppsenak-ospf-te-link-attr-… xuling (F)
- Re: [OSPF] regarding draft-ppsenak-ospf-te-link-a… Acee Lindem (acee)
- [OSPF] regarding draft-ppsenak-ospf-te-link-attr-… xuling (F)
- Re: [OSPF] regarding draft-ppsenak-ospf-te-link-a… Acee Lindem (acee)
- Re: [OSPF] regarding draft-ppsenak-ospf-te-link-a… Peter Psenak
- Re: [OSPF] regarding draft-ppsenak-ospf-te-link-a… xuling (F)
- Re: [OSPF] regarding draft-ppsenak-ospf-te-link-a… Peter Psenak