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From: parminder.mudhar@bt.com
To: freebsd-net@FreeBSD.org
Subject: RE: Routes and tunnels
Date: Thu, 1 Feb 2001 11:15:51 -0000 
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Hi

Thanks for the replies.

Sorry, I forgot to say that I was using to the tunnel to connect to the
remote site with interface address of 132.146.113.1 and I am not using the
tunnels to send the packets to the local address, 132.146.115.164. I am
trying to use tunnels as point to point links for running routing over them.

But the end result is that I do not see a packet destined for the end point
of the tunnel, 132.146.113.1 on the wire.

Parminder Mudhar
__________________________
parminder.mudhar@bt.com

> -----Original Message-----
> From:	Mudhar,PS,Parminder,CEG2 R 
> Sent:	Wednesday, January 31, 2001 5:02 PM
> To:	'freebsd-net@FreeBSD.org'
> Subject:	Routes and tunnels
> 
> Hi
> 
> I don't know if this is intentional or a bug, but if ifconfig is used to
> configure a point to point device, such as 'tun' or the newer 'gif'
> devices, then the kernel insists on installing a route where the
> destination is the end point of the tunnel, the gateway is the source of
> the tunnel and the interface is the device itself. I have checked this in
> version 3.2+KAME, what I a using, and also on version 4.1. The effect of
> the above is that the packet that uses the tunnel will never appear on the
> wire.
> 
> Here is an output
> 
> the_swamp# ifconfig gif0 132.146.115.164 132.145.113.1
> the_swamp# netstat -rnf inet
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags      Netif Expire
> default            132.146.115.1      UGSc        1        0     fxp1
> 127.0.0.1          127.0.0.1          UH          0        4      lo0
> 132.145.113.1      132.146.115.164    UH          0        0     gif0
> 132.146.115/24     link#2             UC          0        0     fxp1 =>
> 132.146.115.1      0:30:19:9a:e4:71   UHLW        2        0     fxp1
> 460
> 
> I am also interested in using gated with point to point tunnels, but gated
> also insists on doing the above for point to point links.
> 
> I thank you in advance for any advice you may have.
> 
> Parminder Mudhar
> __________________________
> parminder.mudhar@bt.com
> 


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