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Date: Thu, 30 Dec 2010 17:50:52 +0300
From: Sergey Matveychuk <sem@FreeBSD.org>
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To: "Achilov, Rashid" <achilov-rn@askd.ru>
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Cc: freebsd-net@freebsd.org
Subject: Re: Tunnel works on 10.10.1.0-10.10.2.0,
	and not works on 172.16.1.0-172.16.2.0
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29.12.2010 13:00, Rashid N. Achilov пишет:
> FreeBSD 8.1-RELEASE. Occured a strange thing.
>
> Take two boxes with 8.1. Do these:
> On #1
> ifconfig gif create
> ifconfig gif0 tunnel AAA.AAA.AAA.AAA BBB.BBB.BBB.BBB
> ifconfig gif0 inet 10.10.1.254 10.10.2.254 netmask 255.255.255.255
>
> On #2
> ifconfig gif create
> ifconfig gif0 tunnel BBB.BBB.BBB.BBB AAA.AAA.AAA.AAA
> ifconfig gif0 inet 10.10.2.254 10.10.1.254 netmask 255.255.255.255
>
> Next, do ping 10.10.2.254 from box #1. Worked!
>
> Now do these:
> On #1
> ifconfig gif create
> ifconfig gif0 tunnel AAA.AAA.AAA.AAA BBB.BBB.BBB.BBB
> ifconfig gif0 inet 172.16.1.254 172.16.2.254 netmask 255.255.255.255
>
> On #2
> ifconfig gif create
> ifconfig gif0 tunnel BBB.BBB.BBB.BBB AAA.AAA.AAA.AAA
> ifconfig gif0 inet 172.16.2.254 172.16.1.254 netmask 255.255.255.255
>
> Next, do ping 172.16.2.254 from box #1. Not worked :-O
>
> Replace boxes onto 7.3-STABLE and re-do last sample (with 172.16). Worked!
>
> Why? Is there any problems in 8.1?

Have you a firewall?
I can't reproduce it with 8.2-PRERELEASE from Dec, 13. Both 10/8 and 
172.16/12 work well.

-- 
Sem.