Re: [mpls] Kathleen Moriarty's No Objection on draft-ietf-mpls-lsp-ping-relay-reply-10: (with COMMENT)
Kathleen Moriarty <kathleen.moriarty.ietf@gmail.com> Wed, 30 September 2015 16:08 UTC
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Date: Wed, 30 Sep 2015 12:08:20 -0400
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From: Kathleen Moriarty <kathleen.moriarty.ietf@gmail.com>
To: Lizhong Jin <lizho.jin@gmail.com>
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Cc: "mpls@ietf.org" <mpls@ietf.org>, draft-ietf-mpls-lsp-ping-relay-reply <draft-ietf-mpls-lsp-ping-relay-reply@ietf.org>, 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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Thank you both for the quick responses. I do agree that George's proposed text clarifies the questions better. That text works for me. Thanks, Kathleen On Wed, Sep 30, 2015 at 12:00 PM, Lizhong Jin <lizho.jin@gmail.com> wrote: > 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! >>> >>> >> > -- Best regards, Kathleen
- [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