19 Jan
2018
19 Jan
'18
9:05 a.m.
On Fri, 19 Jan 2018, Mike Hammett wrote:
Other than people improperly blocking ICMP, when does PMTUD not work? Honest question, not troll.
Mismatch of MTU interface settings between interfaces, mismatch of MTU between L3 devices and intermediate L2 devices, anycast services, ECMP based services where the ICMP error is delivered to the wrong node. So yes, there are plenty reasons that PMTUD doesn't work without anyone doing it because of ill will or incompetence. -- Mikael Abrahamsson email: swmike@swm.pp.se