Windows 2008R2 MTU reverts to default

[Phil Pennock]

On 2013-06-10 at 14:57 +0200, Dick Visser wrote:
> This works for a while, but after a minute or so it changes back to the default:

> Any ideas what might be causing this?

A thought, so only qualifies as "might", I don't know Windows to speak
definitively, but ... IPv6 NDP Route Advertisement with the MTU option?

Windows then updating the manually-configured value based upon learnt
values on the wire?

-Phil