Date: Thu, 29 Mar 2007 02:28:15 +0200 From: eternityos@free.fr To: "freebsd-isp@freebsd.org" <freebsd-isp@freebsd.org> Subject: MTU settings. Message-ID: <1175128095.460b081f94385@imp.free.fr>
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Hi everyone :) Recently, we changed our internet connection to a ppp based (2Mbps). So naturaly, I thought about changing the MTU of my interfaces on the FreeBSD NAT router. So I set it to 576 instead of the default, 1500 on the two interfaces, LAN and WAN. In what I have seen, 576 is the natural mtu for a ppp connection. Right away after this change, the internet connection blocked. I only got it back setting the mtu back at 1500. Why did this block ? Between the modem and the NAT router, we have a cisco router, I didn't change it's mtu yet, would it be the cause ? Any idea ? Thank you. Pierre Ancelot.help
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