Subject: 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 07:49:12 
	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).

itojun