Support. Best Regards, Huaimo -----Original Message----- From: OSPF [mailto:ospf-boun...@ietf.org] On Behalf Of Jeff Tantsura Sent: Friday, July 07, 2017 11:27 AM To: Acee Lindem (acee) <a...@cisco.com>; Abhay Roy (akr) <a...@cisco.com>; ospf@ietf.org Subject: Re: [OSPF] WG adoption poll for draft-ppsenak-ospf-te-link-attr-reuse
+10 to Acee’s comments OSPF community would greatly benefit from the draft being adopted and implemented (stated as co-author) Cheers, Jeff On 7/7/17, 10:22, "OSPF on behalf of Acee Lindem (acee)" <ospf-boun...@ietf.org on behalf of a...@cisco.com> wrote: OSPF Evolution and the role of draft-ppsenak-ospf-te-link-attr-reuse The document draft-ppsenak-ospf-te-link-attr-reuse-05.txt not-only provides flexible and compact mechanisms and encodings for advertising link attributes for single or multiple applications. It is also part of the wider goal of transforming OSPF to a TLV-based protocol that is every bit as extendable as the other IGPs while affording the distinct advantage of optimally partitioning the advertised information into multiple LSAs of different types. This draft represents the last piece of our vision to achieve this outcome. For OSPFv2, we have the base LSAs that cannot be extended in a backward compatible fashion. Additionally, we have RFC 7770 (OSPF Router Information Advertisement) and RFC 7684 (OSPF Prefix/Link Attributes). The former has been extended to support distribution of non-OSPF information in addition to OSPF Router-level protocol information. The extended OSPF Prefix/Link LSAs are being used to support segment routing and other technologies. They are now part of the OSPF base and will be advertised in many OSPF domains. The major implementations have the capability to correlate the base LSAs and the OSPF Prefix/Link LSAs for segment routing. This correlation requires handling lots of chicken and egg complexities that have all been overcome. It has been suggested that since the OSPF TE LSAs (RFC 3630) contain some generally useful link attributes, this be the only means by which this information is advertised in OSPF routing domains. This will be both unwieldy and inefficient due to the advertisement, processing, and storage of the TE LSAs in networks not utilizing RSVP-based TE. There is also the added complexity with this approach as you have not only the chicken and the egg, but the chicken, egg, and the rooster to correlate. For OSPFv3 and OSPFv3 Extended LSAs (draft-ietf-ospf-ospfv3-lsa-extend-14.txt), we have made the difficult choice to extend the base RFC 5340 LSAs (OSPF for IPv6) in a non-compatible fashion. After an initial delay, we have implementations of the OSPFv3 Extended LSAs draft and will soon be advancing it. With the OSPFv3 extended LSAs, we are finally at the point where all the information (other than RSVP TE information) for a given prefix or link is advertised in a single LSA rather than multiple LSAs. Would those who argue for making OSPFv2 TE LSAs generally applicable also want to require the advertisement of RFC 5329 (OSPFv3 Traffic Engineering) LSAs? If so, we would miss a tremendous opportunity. Thanks, Acee On 7/6/17, 6:10 PM, "OSPF on behalf of Acee Lindem (acee)" <ospf-boun...@ietf.org on behalf of a...@cisco.com> wrote: >Support as co-author. More to come… >Acee > >On 7/3/17, 2:37 PM, "OSPF on behalf of Abhay Roy (akr)" ><ospf-boun...@ietf.org on behalf of a...@cisco.com> wrote: > >>We would like to kick-off a poll for WG adoption of the following >>document (per Authors request): >> >>https://datatracker.ietf.org/doc/draft-ppsenak-ospf-te-link-attr-reuse >> >>Please let us know if you support or have concerns with OSPF WG adopting >>this work. >> >>Regards, >>-Abhay >> >>_______________________________________________ >>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 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