Re: [Lsr] WG adoption call for draft-acee-lsr-ospf-admin-tags-07

The multi tag feature is a highly valuable feature for operators for route
manipulation and policies.

This nicely draws parity to BGP communities where you can have a string of
many additive communities.

There have been complex designs I had worked on in the past with mutual
redistribution between ospf and to prevent feedback loops required complex
BGP and OSPF redistribution policies and requires setting BGP community for
ospf2bgp and ospf tag from bgp2ospf, however since a single tag was per
prefix was only supported this made the policy drastically more complex.

Kind Regards

Gyan

On Thu, Jan 7, 2021 at 4:58 AM Peter Psenak <ppsenak=
40cisco.com@dmarc.ietf.org> wrote:

> Hi Aijun,
>
> On 07/01/2021 03:15, Aijun Wang wrote:
> > Hi, Acee and Peter:
> >
> > https://tools.ietf.org/html/rfc8362#section-3.12 has defined the
> Route-Tag
> > Sub-TLV for External-Prefix, is it more straightforward to extend this
> > sub-TLV to be included in other Prefix TLVs(Inter-Area-Prefix TLV,
> > Intra-Area-Prefix TLV) to accomplish the aimed application scenario?
>
>
> we can not change the semantics of the existing Route-Tag Sub-TLV as
> defined in rfc8362 - e.g. only single tag is supported.
>
> So we defined a new TLV that carries multiple tags and that is supported
> by Itra-Aare/Inter-Area/External/NSSA Prefix-LSAs for OSPFv3.
>
>
> > And, do we need to cover multiple tag scenario? Even for external prefix,
> > only one Route-Tag will be processed.
>
> that is exactly what the draft-acee-lsr-ospf-admin-tags defines, see
> section 3.
>
> thanks,
> Peter
>
> >
> > Anyway, I support its adoption.
> >
> >
> > Best Regards
> >
> > Aijun Wang
> > China Telecom
> >
> > -----Original Message-----
> > From: lsr-bounces@ietf.org <lsr-bounces@ietf.org> On Behalf Of Christian
> > Hopps
> > Sent: Tuesday, January 5, 2021 5:17 PM
> > To: lsr@ietf.org
> > Cc: lsr-chairs@ietf.org; Christian Hopps <chopps@chopps.org>
> > Subject: [Lsr] WG adoption call for draft-acee-lsr-ospf-admin-tags-07
> >
> > This begins a 2 week WG adoption call for the following draft:
> >
> >    https://datatracker.ietf.org/doc/draft-acee-lsr-ospf-admin-tags/
> >
> > Please indicate your support or objection by January 19th, 2021.
> >
> > Authors, please respond to the list indicating whether you are aware of
> any
> > IPR that applies to this draft.
> >
> > Thanks,
> > Chris.
> >
> >
> >
>
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>
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<http://www.verizon.com/>

*Gyan Mishra*

*Network Solutions A**rchitect *

*M 301 502-134713101 Columbia Pike *Silver Spring, MD