Forum Discussion
Hamish
Dec 27, 2012Cirrocumulus
PMTU discovery SHOULD work though most networks. If they're installed and maintained by professionals who know what they're doing, and care about not being woken by callouts about strange issues with established connections timing out and dropping.
With IPv6 PMTU discovery is pretty much mandatory, or you set your remote MTU to 1280 (?) which is the minimum MTU for IPv6.
A better fix would be to find out where the ICMP host unreachables are being dropped and fix it.
H