netdev - Re: [RFC] ipv6: dst_allfrag() not taken into account by TCP

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Message-Id: <20120117.123405.2126678655326303069.davem@davemloft.net>
Date:	Tue, 17 Jan 2012 12:34:05 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, tore@....no
Subject: Re: [RFC] ipv6: dst_allfrag() not taken into account by TCP

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 17 Jan 2012 17:28:19 +0100

> It seems that dst_allfrag() will force us to use ip6_fragment() and
> reduce effective MSS to :

Don't use TCP with forced fragmentation.

Use path MTU discovery or an artificially reduced route MTU on paths
where ICMP blocking is causing problems.
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