Re: [Idr] 1 Week Final Call for adoption of draft-dong-idr-rtc-hierarchical-rr-02

[<[e-mail]>]

Hi Sue, John, all

I support WG adoption.

AFAIK, I don't have a use case for this (so personally I could live without) but the RTC  RFC has an issue and therefore, from and STD standpoint, IMO this at least needs to be documented.

Regarding the solution, I would a priori prefer the alternate solution (from Appendix A in v01 / the original solution proposed in v00; ala "Best External") rather than the solution currently proposed in v02 (ala "Add Path") for the following reasons:
- "Add Path" heavily depend on configuration to be done by the Service Provider. This add complexity to the provisioning system which would need to look at the iBGP client's configuration to see if it itself have an iBGP client session
- It looks to me that even the "Add Path" solution requires protocol extension (not crystal clear but the draft asks for STD track) and implementation change. So no specific advantage for "Add Path" on this point.
-The "Best External" solution is IMO more inlined with the current RTC spec/point of view which is to limit BGP states/path at the cost of a specific iBGP propagation rule. Looks more coherent to me and easier from an operational point to have all sessions within the AS behaving along  the same principles.

Specific comment:
- In §3.1 (add path solution)
"The number of RT-Constrain routes to be advertised is a local decision of operators. »
IMO "add path all" is needed, unless you define a new Add Path mode that you would need to specify.


Thanks,
Regards,
Bruno

From: Idr [mailto:[e-mail]] On Behalf Of Susan Hares
Sent: Friday, December 19, 2014 2:45 PM
To: [e-mail]
Cc: [e-mail]
Subject: [Idr] 1 Week Final Call for adoption of draft-dong-idr-rtc-hierarchical-rr-02


The IDR Chairs intend to adopt the draft-dong-idr-rtc-hierarchical-rr-02 as a WG draft.  This is a 1 week final call for comments on the adoption of this draft as WG draft.  The draft can be found at:

http://datatracker.ietf.org/doc/draft-dong-idr-rtc-hierarchical-rr/


Sue Hares and John Scudder



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