From: Chris Rankin <rankincj@yahoo.com>
Subject: Re: [Bridge] Re: No UDP NFS over bridges in Linux 2.6.16.x?
Date: Mon, 17 Apr 2006 19:17:27 +0100 (BST)
Message-ID: <20060417181727.43038.qmail@web52902.mail.yahoo.com>
References: <4443D7C2.7030901@trash.net>
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Cc: nfs@lists.sourceforge.net, bridge@osdl.org
To: Patrick McHardy <kaber@trash.net>,
	Stephen Hemminger <shemminger@osdl.org>
In-Reply-To: <4443D7C2.7030901@trash.net>
Sender: nfs-admin@lists.sourceforge.net
Errors-To: nfs-admin@lists.sourceforge.net

--- Patrick McHardy <kaber@trash.net> wrote:
> I only saw half of this thread (Chris' mails haven't made it to the lis=
t
> yet), but in case you're using bridge-netfilter and conntrack, its most
> likely because of conntrack fragmentation changes in 2.6.16. Conntrack
> defragments packets, but relies on the IP layer to do the
> refragmentation now. With purely bridged traffic, the packets don't go
> through the IP layer, so they exceed the MTU of the outgoing bridge
> port. 2.6.16.6 will include a fix for this problem:
>=20
> [patch 06/22] NETFILTER: Fix fragmentation issues with bridge netfilter

I emailed the packet dumps to Stephen privately, but what was happening w=
as that the server was
receiving the request and was fragmenting the reply.  However, the client=
 was never receiving the
reply packets for some reason.

Yes, I am using connection tracking and netfilter, and the br0 interface =
is referenced in my
iptables rules. I am not using / have not loaded the ebtables modules, al=
though I did compile
them.

Cheers,
Chris


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