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Re: [netconf] Magnus Westerlund's No Objection on draft-ietf-netconf-restconf-notif-13: (with COMMENT)

"Reshad Rahman (rrahman)" <rrahman@cisco.com> Tue, 21 May 2019 16:04 UTC

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From: "Reshad Rahman (rrahman)" <rrahman@cisco.com>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>, The IESG <iesg@ietf.org>
CC: "draft-ietf-netconf-restconf-notif@ietf.org" <draft-ietf-netconf-restconf-notif@ietf.org>, Kent Watsen <kent+ietf@watsen.net>, "netconf-chairs@ietf.org" <netconf-chairs@ietf.org>, "netconf@ietf.org" <netconf@ietf.org>
Thread-Topic: Magnus Westerlund's No Objection on draft-ietf-netconf-restconf-notif-13: (with COMMENT)
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Date: Tue, 21 May 2019 16:03:43 +0000
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Subject: Re: [netconf] Magnus Westerlund's No Objection on draft-ietf-netconf-restconf-notif-13: (with COMMENT)
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Hi,

Thank you for the review. Please see inline.

On 2019-05-16, 7:47 AM, "Magnus Westerlund via Datatracker" <noreply@ietf.org> wrote:

    Magnus Westerlund has entered the following ballot position for
    draft-ietf-netconf-restconf-notif-13: No Objection
    
    When responding, please keep the subject line intact and reply to all
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    Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
    for more information about IESG DISCUSS and COMMENT positions.
    
    
    The document, along with other ballot positions, can be found here:
    https://datatracker.ietf.org/doc/draft-ietf-netconf-restconf-notif/
    
    
    
    ----------------------------------------------------------------------
    COMMENT:
    ----------------------------------------------------------------------
    
    Section 4:
    
    Based on the QoS discussion for draft-ietf-netconf-subscribed-notifications
    weight is not really a a priority in the terms people think of it. It only
    provides a weight for bandwidth allocation.
    
       o  take any existing subscription "priority", as specified by the
          "weighting" leaf node in
          [I-D.draft-ietf-netconf-subscribed-notifications], and copy it
          into the HTTP2 stream weight, [RFC7540] section 5.3, and
    
    I would recommend that the use of "priority" is reformualted here to reflect
    that aspect.
<RR> We got similar comments from another reviewer, the proposed new text for the next revision is:
take the "weighting" leaf node in  [I-D.draft-ietf-netconf-subscribed-notifications], and copy it into the HTTP2 stream weight, [RFC7540] section 5.3, and ...
Would this address your comment?
    
       o  take any existing subscription "dependency", as specified by the
          "dependency" leaf node in
          [I-D.draft-ietf-netconf-subscribed-notifications], and use the
          HTTP2 stream for the parent subscription as the HTTP2 stream
          dependency, [RFC7540] section 5.3.1, of the dependent
          subscription.
    
    What is not obivous to me is that just because that a subscription exists at
    the publisher that it is going over the same HTTP/2 connection and thus there
    might be nothing for the dependency to point at that is relevant for the
    mechanism described in RFC 7540. I didn't even find a recommendation that the
    receiver (subscriber) should actually re-use the HTTP/2 connection for all
    communication with the same publisher.
 <RR> Good point, this is not spelled out.  We will add text for the subscriber's reuse of the HTTP2 session:
for dynamic subscriptions to a specific publisher, all subscriber URI GET requests MUST use a common HTTP2 session for a particular DSCP value.

Regards,
Reshad.

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