Re: [mpls] Mirja Kühlewind's No Objection on draft-ietf-mpls-ldp-mrt-06: (with COMMENT)

Chris Bowers <cbowers@juniper.net> Mon, 06 November 2017 16:15 UTC

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From: Chris Bowers <cbowers@juniper.net>
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Subject: Re: [mpls] =?utf-8?q?Mirja_K=C3=BChlewind=27s_No_Objection_on_draft-?= =?utf-8?q?ietf-mpls-ldp-mrt-06=3A_=28with_COMMENT=29?=
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Mirja,

Thanks for the feedback.  Responses are inline with [CB].

Thanks,
Chris

-----Original Message-----
From: mpls [mailto:mpls-bounces@ietf.org] On Behalf Of Mirja Kühlewind
Sent: Monday, September 11, 2017 6:37 AM
To: The IESG <iesg@ietf.org>
Cc: mpls@ietf.org; draft-ietf-mpls-ldp-mrt@ietf.org; mpls-chairs@ietf.org
Subject: [mpls] Mirja Kühlewind's No Objection on draft-ietf-mpls-ldp-mrt-06: (with COMMENT)

Mirja Kühlewind has entered the following ballot position for
draft-ietf-mpls-ldp-mrt-06: No Objection

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The document, along with other ballot positions, can be found here:
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----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

1) I was just wondering if it was considered to just use one flag of the reserved field of the multi-topology extension in RFC7307 to advertise MRT support, given that MT must always advertised as well...?

[CB]  I don't really understand the suggestion.  The document is requesting three values from the MPLS Multi-Topology Identifiers Registry (defined in RFC 7307). I think that we need all three, MRT-Red, MRT-Blue, and Rainbow MRT, for the protocol to work.  The registry has 64k possible values (with 4k being most useful), of which only 6 are currently used.

Or are you referring to the request for a value from the Label Distribution Protocol (LDP) Parameters registry "TLV Type Name Space"?

2) Why would a node withdraw the MRT capability/ when would it send a MRT advertisement with S=0?

[CB]  As an example, a configuration change on the node to no longer participate in label distribution for MRT would generally result in a withdrawal of the MRT capability, which is done by setting S=0.  The document currently has a  reference to RFC 5661 "LDP Capabilities" for more information on this.  Do you think more text is needed in the document to clarify this?

3) If you update the document, please also see the gen-art review: there are many small nits which will probably also be caught by the RFC editor but if you can fix them now, that's even better!

[CB]  Thanks.  I did that in a separate response.


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