netdev - Re: [Bugme-new] [Bug 8754] New: Kernel addrconf modifies MTU of non-kernel routes

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Message-Id: <20070714150908.093eefdb.akpm@linux-foundation.org>
Date:	Sat, 14 Jul 2007 15:09:08 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...nel-bugs.osdl.org>
Cc:	netdev@...r.kernel.org, bugzilla@...e.lp0.eu
Subject: Re: [Bugme-new] [Bug 8754] New: Kernel addrconf modifies MTU of
 non-kernel routes

On Sat, 14 Jul 2007 14:54:32 -0700 (PDT) bugme-daemon@...zilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=8754
> 
>            Summary: Kernel addrconf modifies MTU of non-kernel routes
>            Product: Networking
>            Version: 2.5
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: IPV6
>         AssignedTo: yoshfuji@...ux-ipv6.org
>         ReportedBy: bugzilla@...e.lp0.eu
> 
> 
> I have an MTU of 16110 set on eth0 on a network where the MTU is 1500 as set by
> RAs. One of the other hosts on the network has an MRU/MTU of 7200 so I have a
> specific route to it with this MTU.
> 
> If I add the route early (i.e. on startup) before address autoconfiguration
> takes place, when the first RA is received the kernel changes the MTU on my
> route - this should not happen.
> 
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