Dear Luigi,
Thanks for your review and comments.
Please see inline.
Original
From: LuigiIannone <g...@gigix.net>
To: 肖敏10093570;
Cc: RTGWG <rtgwg@ietf.org>;
Date: 2024年05月07日 17:37
Subject: Re: New Version Notification for
draft-xiao-rtgwg-rocev2-fast-cnp-00.txt
Hi,
I had a look to this document and have a couple of comments.
- The document does not explain why the original destination of the packet that
experiences congestion has to be put in an IPv6 extension header. What is the
technical reason?
Because in principle that information can be retrieved in the Infiniband
Address Vector using the destination QPN which can be found in the BTH sent
back with the Fast CNP packet.
[XM]>>> Do you mean the sender can use the destination QPN to retrieve the
original destination IPv6 address? If yes, I don't think so. If no, could you
please elaborate a bit more?
- In section 4 the text seems to imply that the sender is able to categories
addresses as receivers vs non-receivers. Is my understanding correct?
[XM]>>> Yes, you're correct. The intention is to differentiate Fast CNP from
CNP.
- In the Security section it is mentioned that implementations have to
implement an access list to for source address checking, but such an access
list does not protect against an attacker spoofing the source address.
Any hint how to solve the issue?
[XM]>>> You're right an access list doesn't protect against an attacker
spoofing the source address. The measure I can think of is to do rate limiting
and/or IPsec.
Best Regards,
Xiao Min
Thanks
Ciao
L.
On 25 Apr 2024, at 11:01, xiao.m...@zte.com.cn wrote:
Hi all,
This is a new I-D that specifies the fast congestion notification packet used
in RoCEv2 networks.
Appreciate your review and comments.
Best Regards,
Xiao Min
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From: internet-dra...@ietf.org <internet-dra...@ietf.org>
To: 李和松10335167;肖敏10093570;李和松10335167;
Date: 2024年04月25日 16:43
Subject: New Version Notification for draft-xiao-rtgwg-rocev2-fast-cnp-00.txt
A new version of Internet-Draft draft-xiao-rtgwg-rocev2-fast-cnp-00.txt has
been successfully submitted by Xiao Min and posted to the
IETF repository.
Name: draft-xiao-rtgwg-rocev2-fast-cnp
Revision: 00
Title: Fast Congestion Notification Packet (CNP) in RoCEv2 Networks
Date: 2024-04-25
Group: Individual Submission
Pages: 12
URL:
https://www.ietf.org/archive/id/draft-xiao-rtgwg-rocev2-fast-cnp-00.txt
Status: https://datatracker.ietf.org/doc/draft-xiao-rtgwg-rocev2-fast-cnp/
HTMLized: https://datatracker.ietf.org/doc/html/draft-xiao-rtgwg-rocev2-fast-cnp
Abstract:
This document describes a Remote Direct Memory Access (RDMA) over
Converged Ethernet version 2 (RoCEv2) congestion control mechanism,
which is similar to Really Explicit Congestion Notification (RECN)
described in RFC 7514, also known as Fast Congestion Notification
Packet (CNP). By extending the RoCEv2 CNP, Fast CNP can be sent by
the switches directly to the sender, advising the sender to reduce
the transmission rate at which it sends the flow of RoCEv2 data
traffic.
The IETF Secretariat
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