[Bridge] 4 ports bridge problem

Stephen Hemminger shemminger at vyatta.com
Sun Sep 21 22:51:32 PDT 2008


On Mon, 22 Sep 2008 07:58:21 +0800
czj <linuxdemo at 126.com> wrote:

> Hi all,
> I work on a SOC based on AMCC/glacier based on PPC460GT. (
> http://WWW.AMCC.com <http://micrel.com/page.do?page=product-info/sys_on_chip.jsp>)
> This component has 4 network interfaces. 
> 
> Every one is connected to a PC.
> 
> eth0 =>192.168.1.11
> eth1 => 192.168.1.22
> eth2 => 192.168.1.33
> eth3 => 192.168.1.44

You have layer 2 and 3 confused. Are you sure you don't intend
to route (layer 3) rather than bridging.

> I want to make a bridge with these 4 ports
> 
> #brctl addbr br0
> 
> #ifconfig br0 192.168.1.20 netmask 255.255.255.0
> 
> #ifconfig eth0 0.0.0.0 up
> 
> #ifconfig eth1 0.0.0.0 up
> 
> #ifconfig eth2 0.0.0.0 up
> 
> #ifconfig eth3 0.0.0.0 up
> 
> # brctl addif br0 eth0
> 
> # brctl addif br0 eth1
> 
> # brctl addif br0 eth2
> 
> # brctl addif br0 eth3
> 
> #brctl stp on
> 
> but my problem is that when I used the PC(which IP is 192.168.1.11/24) to ping other PCs,
> 
> the ping reply time from 192.168.1.22 was about 1000ms;
> the ping reply time from 192.168.1.33 was about 0.2ms;
> the ping reply time form 192.168.1.44 was about 300ms;
> 
> Why? and how to configure  the 4 ethernet-ports glacier board to be a bridge or switch correctly? thanks a lot.

Don't assign IP addresses to the ethernet devices, only one common address
to the bridge. 


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