[radvd-devel-l] Changing MTU with radvd (AdvLinkMTU in radvd.conf)
dshwatrz at gmail.com
Mon Mar 31 04:49:16 EDT 2008
- I did not checked under proc/sys/net...
Running on the host now:
On Mon, Mar 31, 2008 at 10:48 AM, Pekka Savola <pekkas at netcore.fi> wrote:
> On Mon, 31 Mar 2008, David Shwatrz wrote:
> > Any idea why the MTU was not changed from 1500 to 1495 on that host?
> You're looking at the wrong place. Neighbor Discovery -derived MTU is
> updated in a sysctl such as net.ipv6.conf.eth0.mtu -- it isn't
> reflected in 'ifconfig -a' that (generic) MTU because that affects v4
> as well.
> 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.
> I agree that this is not very intuitive place to look for the MTU
> information but there isn't much I can do about it.. :-)
> Pekka Savola "You each name yourselves king, yet the
> Netcore Oy kingdom bleeds."
> Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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