Subject: Re: problem with ftp.netbsd.org over IPv6?
To: NetBSD current-users <current-users@netbsd.org>
From: Ronald van der Pol <Ronald.vanderPol@rvdp.org>
List: current-users
Date: 06/13/2002 15:32:21 
On Wed, Jun 12, 2002 at 10:44:43 +0200, Feico Dillema wrote:

> On Wed, Jun 12, 2002 at 01:36:51AM +0200, BOUWSMA Beery wrote:
> > > Does 'ftp ftp.netbsd.org' work for you if you are using IPv6
> > 
> > Works here...
> And from norway, and about at the same responsiveness and bandwidth as
> IPv4.

(oops, I thought I had send this too netbsd-users)

Hmm, strange. I still have problems. The tcpdump below is from another
site. Looks like the TCP handshake is working, but after that I don't
get any packets from www.netbsd.org anymore.

I have tried this on a couple of nodes (various versions of FreeBSD and
NetBSD). None works. But as it works for others, I suppose it is some
kind of networking problem. But I don't understand what kind of problem,
because I do get a SYN packet from www.netbsd.org. Any ideas?

einstein# tcpdump -s 1500 -v -v -v -n host 3ffe:8050:201:1860:290:27ff:feab:19a7 
tcpdump: listening on rtk0
15:02:22.791234 2001:6e0:206:1:220:edff:fe19:4862.49216 > 3ffe:8050:201:1860:290:27ff:feab:19a7.80: S [tcp sum ok] 1430890039:1430890039(0) win 16384 <mss 1440,nop,wscale 0,nop,nop,timestamp 12031 0> [flowlabel 0x67713] (len 40, hlim 64)
15:02:22.952022 3ffe:8050:201:1860:290:27ff:feab:19a7.80 > 2001:6e0:206:1:220:edff:fe19:4862.49216: S [tcp sum ok] 2835324625:2835324625(0) ack 1430890040 win 32768 <mss 1440,nop,wscale 0,nop,nop,timestamp 2942913 12031> (len 40, hlim 58)
15:02:22.952057 2001:6e0:206:1:220:edff:fe19:4862.49216 > 3ffe:8050:201:1860:290:27ff:feab:19a7.80: . [tcp sum ok] ack 1 win 17280 <nop,nop,timestamp 12031 2942913> [flowlabel 0x67713] (len 32, hlim 64)
15:02:59.411672 2001:6e0:206:1:220:edff:fe19:4862.49216 > 3ffe:8050:201:1860:290:27ff:feab:19a7.80: P [tcp sum ok] 1:8(7) ack 1 win 17280 <nop,nop,timestamp 12104 2942913> [flowlabel 0x67713] (len 39, hlim 64)
15:03:00.216656 2001:6e0:206:1:220:edff:fe19:4862.49216 > 3ffe:8050:201:1860:290:27ff:feab:19a7.80: P [tcp sum ok] 1:8(7) ack 1 win 17280 <nop,nop,timestamp 12105 2942913> [flowlabel 0x67713] (len 39, hlim 64)
15:03:02.216523 2001:6e0:206:1:220:edff:fe19:4862.49216 > 3ffe:8050:201:1860:290:27ff:feab:19a7.80: P [tcp sum ok] 1:8(7) ack 1 win 17280 <nop,nop,timestamp 12109 2942913> [flowlabel 0x67713] (len 39, hlim 64)

	rvdp