Subject: Re: PPPoE vs ETHERMTU
To: Jun-ichiro itojun Hagino <>
From: Angelos D. Keromytis <>
List: tech-net
Date: 07/01/2001 00:15:10
In message <>, Jun-ichiro itojun Ha
gino writes:
>	this is exactly the symptom with path MTU discovery problem
>	(though it seems that your provider's mail server uses a bit strange
>	TCP retransmission strategy i guess).  ask your provider to do either
>	of the following:
>	- turn off provider mailbox's path MTU discovery
>	- let ICMPv4 need fragment message through over some of the routers
>	  they have between DSL entrypoint and the provider mailbox

If you're using ppp(8), you can use the tcpmssfixup option.