[radvd-devel-l] Changing MTU with radvd (AdvLinkMTU in radvd.conf)

David Shwatrz dshwatrz at gmail.com
Mon Mar 31 04:52:51 EDT 2008

I am running 2.6.21 kernel.

However, as I discovered now after Pekka Savola answer,
 cat /proc/sys/net/ipv6/conf/eth0/mtu gives the MTU which I set in the
as expected.

So I am not sure that the patch is relevant here.


On Mon, Mar 31, 2008 at 11:15 AM, Jim Paris <jim at jtan.com> wrote:
> David Shwatrz wrote:
>  > Any idea why the MTU was not changed from 1500 to 1495 on that host?
> Pekka Savola wrote:
>  > However, if you did tcpdumps of traffic, you should see that v6 connections
>  > use the lower MTU.  Otherwise the client OS MTU calculation has a bug.
>  Hi,
>  Linux kernel 2.6.24 and earlier have a bug.  I provided a patch here:
>    http://www.mail-archive.com/netdev@vger.kernel.org/msg59682.html
>  and I believe it was applied in 2.6.25-rc1.
>  -jim
>  --
>  radvd-devel-l mailing list  :  radvd-devel-l at litech.org
>  http://lists.litech.org/listinfo/radvd-devel-l

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