MSN blocking PMTUD

Mon May 17 16:21:49 UTC 2004

On Mon, 17 May 2004, Miguel Mata-Cardona wrote:

> Is there somebody from MSN here? Is there a workaround for this 
> problem without using other type of tunneling? If not, is there any 
> other workaround?

Use "ip mtu 1500" on each tunnel interface. Uses more CPU but works.

"ip adjust-mss 1300" is also nice, in conjunction with the above you end 
up with the TCP traffic not being fragmented and it still being 
transparent for fullsize UDP traffic.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se