[lug] Network interconnection question....

[Dave Pitts]

>
> If the goal is to make the emulator reachable on 205.250.10.5, I think you
> can achieve that by bridging eth0 and tun0, then assigning the
> 205.250.10.5IP to the IBM s390 emulator.  You probably won't need the
> 10.x addresses to accomplish this.  You might also need to move your
> 205.250.10.4 IP to the new br0 interface, rather than assigning it to eth0,
> but I'm not sure about that.
>
> brctl addif br0 eth0
> brctl addif br0 tun0
> ifconfig br0 up
>   
I've tried this and you can't assign the tunnel device to the bridge.
You get:

can't add tun0 to bridge br0: Invalid argument

> On 6/27/07, Dave Pitts <dpitts at cozx.com> wrote:
>   
>> >
>> > Hello:
>> >
>> > I've a got an internal (to the Linux box) network question. First the
>> > scenario:
>> >
>> > 1. I've got a tunnel interface running that connects to an emulator
>> > (Hercules)
>> >    that is running the IBM s390 Linux.
>> >
>> > 2. A Linux host with a single ethernet connection.
>> >
>> > All is well so far. Now I want to configure the network (I don't have
>> > sufficient network addresses to subnet) such that the ethernet interface
>> > has
>> > two IP addresses and bridge (or whatever) to the tunnel interface.
>> >
>> > To look like this:
>> >
>> >
>> >         +----------------------------------+
>> >         |
>> >         |               +---- local services
>> >         |               |
>> >         |               |
>> > --------+---- eth0 -----+
>> >         |               |
>> >         |               tun0
>> >         |               |
>> >         |               +---- Hercules (s390 Linux)
>> >         |
>> >         +-----------------------------------+
>> >
>> > The tun0 interface addresses are configured with non-routable IP address:
>> >
>> > 10.90.1.1 <-> 10.90.1.2
>> >
>> > And the Ethernet (for example) to have the addresses:
>> >
>> > 205.250.10.4 and 205.250.10.5
>> >
>> > Where the second eth0 address connects to the 10.90.1.0 network.
>> > And the first ethernet address works normally.
>> >
>> > I've tried several things without success. Any Ideas???
>> >

-- 
Dave Pitts             PULLMAN: Travel and sleep in safety and comfort.
dpitts at cozx.com        My other RV IS a Pullman (Colorado Pine).
http://www.cozx.com/~dpitts