[Bridge] Bridge works, but how host is limited

[Bridge] Bridge works, but how host is limited

[Tom Miller]

I've got a bridge up on my Suse 10 box, let's call it the bridge host.
The 2 NICs are connected, and my main box (Suse 10.1) can print to the
printer on the other side of the bridge host. Everything pings
everywhere, i.e. the LAN extends across the bridge as expected. Cool!

I used the basic configuration:

   1. ifconfig eth0 0.0.0.0
   2. ifconfig eth1 0.0.0.0
   3. brctl addbr mybridge
   4. brctl addif mybridge eth0
   5. brctl addif mybridge eth1

plus:

    ifconfig mybridge 192.168.100.5 netmask 255.255.255.0

On the bridge host, I can browse to an Apache-served web page on my main
box, but cannot browse to the Internet or print on the printer. Wonder
what is wrong? Any suggestions?

Is there some way to configure the bridge itself as a network device?

Thanks
Tom

-- 

Miller Associates, Inc.
www.meddevsqa.com
VOX IA 641.469.3535
VOX MN 612.284.2833
FAX 413.581.6326

Re: [Bridge] Bridge works, but how host is limited

[Stephen Hemminger]

On Wed, 15 Nov 2006 19:16:02 -0600
Tom Miller <tmiller@lisco.com> wrote:

> I've got a bridge up on my Suse 10 box, let's call it the bridge host.
> The 2 NICs are connected, and my main box (Suse 10.1) can print to the
> printer on the other side of the bridge host. Everything pings
> everywhere, i.e. the LAN extends across the bridge as expected. Cool!
> 
> I used the basic configuration:
> 
>    1. ifconfig eth0 0.0.0.0
>    2. ifconfig eth1 0.0.0.0
>    3. brctl addbr mybridge
>    4. brctl addif mybridge eth0
>    5. brctl addif mybridge eth1
> 
> plus:
> 
>     ifconfig mybridge 192.168.100.5 netmask 255.255.255.0
> 
> On the bridge host, I can browse to an Apache-served web page on my main
> box, but cannot browse to the Internet or print on the printer. Wonder
> what is wrong? Any suggestions?
> 
> Is there some way to configure the bridge itself as a network device?
> 
> Thanks
> Tom
> 

You have no default route. You created a static IP entry, but there is no
route to your gateway.  If you use DHCP, then it sets up default route
as well.