On 10 June 2013 22:48, Phil Pennock <[email protected]> wrote: > 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?
Yup, this was the case. I watched it continuously, and when an RA came in, it overwrote the manually configured MTU. Next question: how do I prevent that from happening? -- Dick Visser System & Networking Engineer TERENA Secretariat Singel 468 D, 1017 AW Amsterdam The Netherlands
