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To: Jake Bullet <jbullet,AT,cats,DOT,meow,DOT,at>
Subject: Re: Win2k and CIPE
From: Phil Scarratt <fil,AT,draxsen,DOT,com>
Date: Wed, 03 Sep 2003 10:53:29 +1000
Cc: cipe-l,AT,inka,DOT,de
In-reply-to: <Pine.LNX.4.21.0309022128100.25514-100000@cats.meow.at>
Organization: Draxsen Technologies
References: <Pine.LNX.4.21.0309022128100.25514-100000@cats.meow.at>

Jake Bullet wrote:

On Tue, 2 Sep 2003, Phil Scarratt wrote:


Jake Bullet wrote:

Okay, what I should have said was "I've not added anything to the routing
table" rather than saying it was empty.

With alice(cipcb0) and chris's(cipcb1) interface enabled it looks like
this:

Kernel IP routing table
Destination   Gateway        Genmask         Flags Metric Ref  Use  Iface
172.16.0.2    *              255.255.255.255 UH    0      0      0  cipcb0
172.16.1.2    *              255.255.255.255 UH    0      0      0  cipcb1
192.168.200.0 *              255.255.255.192 U     0      0      0  eth0
default       192.168.200.62 0.0.0.0         UG    0      0      0  eth0


OK...that makes more sense now..... Let's recap a few things: 1. Can Alice ping Bob and vice-versa?

Yes.


2. Can Chris ping Bob and vice-versa?

Yes.


3. Adding a route to 172.16.1.0 on Alice and pinging Chris doesn't work

Correct.


4. What is the default route on Chris? Chris needs to know how to get to 172.16.0.0 specifically if it's default route is NOT Bob.

The default route is to 0.0.0.0 through his local gateway 192.168.250.190


I've tried adding routes for 172.16.0.0/255.255.0.0 and the win2k client
seems to fail to route packets for 172.16.0.0 down it.

Stephen


From what I can tell, what needs to happen on Chris is:
route add 172.168.0.0 mask 255.255.255.0 172.16.1.1
For testing purposes it may be worth trying the specific route to Alice:
route add 172.168.0.2 mask 255.255.255.255 172.16.1.1
and then ping Alice from Chris. When pinging, run windump/ethereal and see which interface the packets are going out CIPE or interface that is connected to it's local gateway.


Also, I have a vague recollection that Win2k routing has trouble with networks whose third ip address component was 0 (even though it is valid). I could be wrong but I have a de-ja-vu about using networks such as 192.168.0.x (or in your case 172.16.0.x) and trying add routes. Like I said, only a vague recollection.....not sure of the exact circumstances so could've been something else causing it.....

Failing this, what's the route table on Chris look like?

Fil


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