keeping uml and host on separate nets

[morteoh]

Hi,

I'm trying to test out UML on my laptop, and I want to have uml on a different net than my host. I currently am using 192.168.1.25 on my host and i want to be using 192.168.0.xxx on my uml guests.

I have been playing around with bridges, and was doing this :

Code: Select all

ifconfig eth0 0.0.0.0 promisc up
brctl addbr br0
brctl addif br0 eth0
brctl setfd br0 0
brctl sethello br0 0
brctl stp br0 off

brctl addbr umlbr0
brctl setfd umlbr0 0
brctl sethello umlbr0 0
brctl stp umlbr0 0
tunctl -u root -t umlc0
ifconfig umlc0 0.0.0.0 promisc up
brctl addif umlbr0 umlc0

ifconfig umlbr0 192.168.0.1 netmask 255.255.255.0

And i'm booting with :

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./uml ubda=rootfs ubdb=swapfs umid=$NAME mem=128M eth0=tuntap,umlc0,00:00:00:00:00:01 con=null con0=null,fd:1 con1=fd:0,fd:1

and my eth0 (on the guest) if confiured with :

Code: Select all

 
ifconfig eth0 192.168.0.2 netmask 255.255.255.0
route add default gw 192.168.0.1

With this setup, I can now ping 192.168.0.1 (umlbr0) and 192.168.1.25 (br0/eth0). But I can't ping 192.168.1.1 (router) or anything else from UML (but it works from the host).

I have tried to enable ip_forward but no luck..

So I'm probably missing something obvious.. Just can't see it

Any suggestions?

Thanks!
Morten

[GordSki]

I think the problem is that nothing else, other than the host machine, knows how to get to your 192.168.0.x net. Try adding a static route to your router that points traffic for 192.168.0.x to 192.168.1.25. If you do that you might not need the bridge, I'm not sure about that tho.....

G.