Re: trouble with IPv6-in-ipv4 tunnel configuration

Hi, Thorsten,

I made the configuration according to your suggestion.  But it still failed.  Very strange.  I used  tcpdump to catch the packets in the device and found that:
(1) on fxp0 there were ping icmp echo request and reply packets  (encap), but 
(2) on gif0 there ware only ping icmp request packets, the reply packets all lost!

very strange.  I guess there was something wrong with my protocol stack configuration. or tunnel configuration?  I am using OpenBSD3.4.

Thanks again.

Best regards,
--
Hui, WANG
InfoNet Lab,USTC
http://if.ustc.edu.cn/~hwang
----- Original Message ----- 
From: "Thorsten Glaser" <[email protected]>
To: "Wang Hui" <[email protected]>
Cc: <[email protected]>
Sent: Saturday, March 20, 2004 1:53 AM
Subject: Re: trouble with IPv6-in-ipv4 tunnel configuration 


> Dixitur illum [email protected] scribere...
> 
> >======================================
> >Your IPv6 address block is:  3ffe:3216:2101:21ff::/64
> >The tunnel broker's Ipv4 address is : 202.38.64.185
> >Your registered tunnel end's IPv4 address is: 202.38.75.76
> >The tunnel broker's IPv6 address is : 3ffe:3216:2101:2100::5
> >======================================
> 
> # ifconfig gif0 giftunnel 202.38.75.76 202.38.64.185
> # ifconfig gif0 inet6 3ffe:3216:2101:2100::6 3ffe:3216:2101:2100::5 prefixlen 128 alias
> # route -n add -inet6 default fe80::%gif0 -mtu 1280
> # ifconfig fxp0 inet6 3ffe:3216:2101:21ff::1 prefixlen 64 alias
> 
> If you did *not* get a hint saying your tunnel address
> is 3ffe:3216:2101:2100::6, just leave the second line out.
> Then you'll get an unnumbered tunnel, but that doesn't matter
> as long as fxp0 (in this example) stays up.
> (fxp0 is what I think the LAN interface would be)
> 
> //Thorsten
> -- 
> Solange man keine schmutzigen Tricks macht, und ich meine *wirklich*
> schmutzige Tricks, wie bei einer doppelt verketteten Liste beide
> Pointer XORen und in nur einem Word speichern, funktioniert Boehm ganz
> hervorragend. -- Andreas Bogk über boehm-gc in d.a.s.r