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Date: Thu, 09 Dec 2004 13:53:27 +0900
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From: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?=
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To: "Konstantin KABASSANOV" <Konstantin.Kabassanov@lip6.fr>
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References: <003101c4dd20$8ab9f070$8748e384@ipv6.lip6.fr>
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cc: net@freebsd.org
Subject: 
	Re: the correct ipv6 behavior for interfaces with gif tunnel on them
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>>>>> On Wed, 8 Dec 2004 13:22:10 +0100, 
>>>>> "Konstantin KABASSANOV" <Konstantin.Kabassanov@lip6.fr> said:

> I have a freebsd box with a gif tunnel configured. I observed that even if
> ifconfig displays MTU 1500 for both gif and physical interface, 1300 bytes
> ipv6 packets transiting on the gif interface are systematically fragmented
> while transiting on the lower physical interface to 1280 bytes. Is it the
> normal behavior?

Please provide more detailed network configuration.  Are you talking
about a router box forwarding packets onto gif and physical
interfaces?  Please also specify the OS name (which I guess is
FreeBSD) and its version.

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei@isl.rdc.toshiba.co.jp