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Re: ipv6 stack seems to forget to send ACKs

To: Wichert Akkerman <wichert@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx
Subject: Re: ipv6 stack seems to forget to send ACKs
From: Andrew McGregor <andrew@xxxxxxxxxxxxxx>
Date: Thu, 09 Jan 2003 08:52:19 +1300
Cc: Maciej Soltysiak <solt@xxxxxxxxxxxxxxxxx>, netdev@xxxxxxxxxxx
In-reply-to: <20030108170139.GL22951@xxxxxxxxx>
References: <20030108150201.GA30490@xxxxxxxxx> <Pine.LNX.4.44.0301081718340.4542-100000@xxxxxxxxxxxxxxxxx> <20030108170139.GL22951@xxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
Selective ACK is mandatory in IPv6 and uses a somewhat different algorithm, so you shouldn't be seeing nearly as many ACKs as an IPv4 client would do by default.

Andrew

--On Wednesday, January 08, 2003 18:01:39 +0100 Wichert Akkerman <wichert@xxxxxxxxx> wrote:

Previously Maciej Soltysiak wrote:
I seem to be getting better results than you, i think that it is not an
issue of ipv6 implementation but simply the case of time sensitive
traffic fighting with other Internet traffic over tunnels through ipv4
networks.

Actually, I don't follow this. How could any kind of traffic shaping
result in my client not sending ACKs, which is what the tcpdump
seems to indicate? I can understand packets being dropped which
would result in retransmits, but that is not the case here.

Wichert.

(usual I'm-no-network-guru-and-might-be-misreading-things disclaimer here)

--
Wichert Akkerman <wichert@xxxxxxxxx>           http://www.wiggy.net/
A random hacker
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