Re: [mpls] Kathleen Moriarty's No Objection on draft-ietf-mpls-lsp-ping-relay-reply-10: (with COMMENT)
Lizhong Jin <lizho.jin@gmail.com> Wed, 30 September 2015 16:00 UTC
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References: <20150928144514.27528.79571.idtracker@ietfa.amsl.com> <CAH==cJzA_+AMYPRO0Fj3hmKAVZkMs4s1+-FLkUhNJ2iTEGJjnw@mail.gmail.com> <D2316032.1225AB%swallow@cisco.com>
Date: Thu, 01 Oct 2015 00:00:37 +0800
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From: Lizhong Jin <lizho.jin@gmail.com>
To: "George Swallow (swallow)" <swallow@cisco.com>
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Cc: draft-ietf-mpls-lsp-ping-relay-reply <draft-ietf-mpls-lsp-ping-relay-reply@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, Kathleen Moriarty <Kathleen.Moriarty.ietf@gmail.com>, The IESG <iesg@ietf.org>, mpls-chairs <mpls-chairs@ietf.org>
Subject: Re: [mpls] Kathleen Moriarty's No Objection on draft-ietf-mpls-lsp-ping-relay-reply-10: (with COMMENT)
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Thanks, George, I am OK with your suggestion. Lizhong On Wed, Sep 30, 2015 at 11:52 PM, George Swallow (swallow) < swallow@cisco.com> wrote: > Lizhong - > > Just a bit of word-smithing. See inline. > > Thanks, > > George > > > > From: Lizhong Jin <lizho.jin@gmail.com> > Date: Tuesday, September 29, 2015 at 11:03 AM > To: Kathleen Moriarty <Kathleen.Moriarty.ietf@gmail.com> > Cc: The IESG <iesg@ietf.org>, mpls-chairs <mpls-chairs@ietf.org>, > draft-ietf-mpls-lsp-ping-relay-reply < > draft-ietf-mpls-lsp-ping-relay-reply@ietf.org>, "mpls@ietf.org" < > mpls@ietf.org> > Subject: Re: Kathleen Moriarty's No Objection on > draft-ietf-mpls-lsp-ping-relay-reply-10: (with COMMENT) > > Hi, Kathleen > Thanks for the review. Please see inline below. > > Regards > Lizhong > > On Mon, Sep 28, 2015 at 10:45 PM, Kathleen Moriarty < > Kathleen.Moriarty.ietf@gmail.com> wrote: > >> Kathleen Moriarty has entered the following ballot position for >> draft-ietf-mpls-lsp-ping-relay-reply-10: No Objection >> >> When responding, please keep the subject line intact and reply to all >> email addresses included in the To and CC lines. (Feel free to cut this >> introductory paragraph, however.) >> >> >> 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-mpls-lsp-ping-relay-reply/ >> >> >> >> ---------------------------------------------------------------------- >> COMMENT: >> ---------------------------------------------------------------------- >> >> Thanks for your work on this draft. The security review from 6 months >> ago hasn't been fully addressed in the draft and I think it would be >> helpful to do so. There were responses given on list, but corresponding >> updates didn't happen for all of the comments. >> >> https://www.ietf.org/mail-archive/web/secdir/current/msg05301.html >> >> For the first comment, the response was that this mechanism does not >> deprecate use of "Echo Reply". The language in the first paragraph of >> section 3 should be made clear on that point. >> >> [Lizhong] OK, how about to change the first paragraph in section3 as > below. > > This new > message is used to replace Echo Reply message which is sent from the > replying LSR to a relay node or from a relay node to another relay > node. Note that the reply message from any node to the initiator will > > still be Echo Reply. > > [George] > > I suggest: > > [[RFC4379] defines two message types, Echo Request and Echo Reply. This > document defines a new message type, Relayed Echo Reply. The Relayed > > Echo Reply message is used in place of the Echo Reply message when an LSR is > > replying LSR to a relay node. > > > >> For the second comment: >> s4.1: Is the outermost label allowed to be set to 255 to support the >> “ping” mode or must it always be set to 1, 2, etc. to support >> “traceroute" >> mode - as described in RFC 4379 s4.3? I know s5 is just an example >> but it really looks like this extension is just supposed to be for >> fault >> isolation. >> >> The response via email says it is possible to set it to 255, could this >> be made clear in the draft? >> > [Lizhong] in section4, we added that LSP ping is possible as below: > > If operator has knowledge of the relay nodes, > the initiator could do LSP Ping by directly sending Echo Request with > Relay Node Address Stack TLV containing the already known relay > nodes. > > Is the above enough? It seems a bit redundant to say TTL is set to 255 in > > Ping mode here. > > I suggest > > To preform a ping operation, the initiator first discovers the relay > nodes. Once those nodes have been discovered, the initiator includes > the Relay Address Stack TLV any Echo Request message. The node can > then ping as normal. Note that in some cases, the repeated lack of > replies to Echo Request messages may be due to a route change that > Has impacted the necessary stack of relay nodes. In this case the > initiator may need to re-discover the relay nodes. > > The following sections describe the procedures for sending and receiving > Echo Request messages with the the Relay Address Stack TLV. These > procedures can be used in “trace route” mode to discover the relay nodes. > > > >> The third comment was addressed, thank you. >> >> It was also good to see the security considerations cover path discovery >> as well as DoS related attacks. Thanks for that! >> >> >> >
- [mpls] Kathleen Moriarty's No Objection on draft-… Kathleen Moriarty
- Re: [mpls] Kathleen Moriarty's No Objection on dr… Lizhong Jin
- Re: [mpls] Kathleen Moriarty's No Objection on dr… George Swallow (swallow)
- Re: [mpls] Kathleen Moriarty's No Objection on dr… Lizhong Jin
- Re: [mpls] Kathleen Moriarty's No Objection on dr… Kathleen Moriarty