tech-net: Re: ath0: IPv6 packet does not reach the other end

Subject: Re: ath0: IPv6 packet does not reach the other end
To: None <tech-net@netbsd.org>
From: Jun-ichiro itojun Hagino <itojun@iijlab.net>
List: tech-net
Date: 10/16/2003 07:52:34

>	it seems that there's some issue in ath0 interface.
>
>	laptop
>	  |ath0
>	  |
>	  |11a/b/g
>	  |
>	melco basestation (a/b/g)
>	  |
>	==+== 100bt ethernet
>	  |sip2
>	IPv6 router (*)
>	  |
>	  |IPv6 tunnel (MTU=1280)
>	  |
>	IPv6 router
>	  |
>	(((IPv6 cloud)))
>	  |
>	cvs.kame.net
>
>	if I try to copy large file from laptop to cvs.kame.net (or
>	cvs.netbsd.org) over IPv6, file transfer will stuck after PMTUD.
>	packet sized 1280 byte will not reach laptop from the 1st hop router
>	(*).  i have never experienced such symptom when i was using wi0 on
>	laptop.  i will test again with wi0 (since switching to net80211
>	layer change might be the cause).

	the symptom does not happen with wi0 (using net80211).
	this is with very latest kernel.

	somehow the symptom does not happen with IPv4.  are there anything
	special in ath* code for IPv4 (or IPv6)?

itojun


NetBSD starfruit.itojun.org 1.6ZD NetBSD 1.6ZD (STARFRUIT) #504: Thu Oct 16 07:11:20 JST 2003  itojun@starfruit.itojun.org:/home/itojun/NetBSD/src/sys/arch/i386/compile/STARFRUIT i386