Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknown-msg-03 - Respond by Dec 2, 2013
Tomek Mrugalski <tomasz.mrugalski@gmail.com> Tue, 03 December 2013 20:00 UTC
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Date: Tue, 03 Dec 2013 20:59:58 +0100
From: Tomek Mrugalski <tomasz.mrugalski@gmail.com>
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Subject: Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknown-msg-03 - Respond by Dec 2, 2013
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On 18.11.2013 18:15, Bernie Volz (volz) wrote: > Folks, the authors of draft-ietf-dhc-dhcpv6-unknown-msg-03 > (http://tools.ietf.org/html/draft-ietf-dhc-dhcpv6-unknown-msg-03) > believe it is ready for working group last call. Please review this > draft and indicate whether or not you feel it is ready to be published. > Your input is important! Please respond by Dec 2^nd , 2013. I strongly support this document moving forward after the comments below are addressed. 1. Abstract. The full name of the protocol is "Dynamic Host Configuration Protocol for IPv6", not "Dynamic Host Configuration Protocol version 6". (That is also used in section 1) .There is no such thing as DHCPv6 function node. I propose to update the abstract as: Dynamic Host Configuration Protocol for IPv6 (DHCPv6) isn't specific about handling messages with unknown types. This memo describes the problems and defines how a DHCPv6 entities node should behave when receiving unknown messages. This document updates RFC 3315. 2. Section 3: "Another issue is that, it's not specific in RFC3315 about what a relay agent... " => "Another issue is that RFC3315 does not specify what a relay agent..." 3. Section 4.1 "In the case that a new type of relay message is sent to a relay agent but the relay agent doesn't recognize it, the message is put into a Relay-forward message and sent to the server. Then the server knows the relay agent doesn't support the new message.". The last sentence is not true. The server can't really distinguish if the relay supports the message or not, as in both cases the reaction (forward towards the server) would be the same. I think removing the last sentence would be helpful here. Alternatively, perhaps you wanted to discuss the case where the new message is sent to the relay by the server, relay doesn't support it, so it forwards it back to the server. That is a worthy thing to mention, but the current text does not reflect that situation. You may address that by extending the first sentence a bit: "In the case that a new type of relay message is sent by the server to a relay agent but the relay agent doesn't recognize it, the message is put into a Relay-forward message and sent to the server.". If you don't have any preference, I would prefer the first approach (remove second sentence) as it is more generic. 4. Section 4.2 "If the relay agent received messages other than Relay-forward and Relay-reply, it MUST forward them as is described in Section 20.1.1 of [RFC3315].". This sentence is incorrect. See RFC6977 and the Reconfigure-reply message definition. Relays are often have requestor capability, so they are likely to receive LEASEQUERY-REPLY, LEASEQUERY-DATA and LEASEQUERY-DONE messages as well (See RFC5007 and 5460). There may be other message types that are are targeted at the relay agent itself (and not expected to be relayed). Anyway, I think the right thing to say here is: If the relay agent received a Relay-forward message, Section 20.1.2 of [RFC3315] defines the related behavior. If the relay agent received messages other than Relay-forward and Relay-reply and the relay agent does not recognize its message type, it MUST forward them as is described in Section 20.1.1 of [RFC3315]. Thank you for doing this work. It is very useful clarification. Tomek
- [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknown-ms… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Sheng Jiang
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… ian.farrer
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Yuchi Chen
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Marcin Siodelski
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Qi Sun
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Ted Lemon
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Tom Taylor
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… ian.farrer
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Ted Lemon
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Liubing (Leo)
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Marcin Siodelski
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Qi Sun
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Marcin Siodelski
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Bernie Volz (volz)
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Qiong
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Tomek Mrugalski
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Ted Lemon
- Re: [dhcwg] WGLC for draft-ietf-dhc-dhcpv6-unknow… Cong Liu