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Date: Sat, 24 Feb 2007 09:59:47 -0800
From: Stephen Hemminger <shemminger@linux-foundation.org>
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Subject: Re: [Bridge] Problem on bridge
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To: Fernando Rodriguez <frod@aitelecom.net>
Cc: bridge@lists.osdl.org

Fernando Rodriguez wrote:
> Hello, 
>
> I have set up a bridge with the following script that starts after the
> network interfaces are started
>
> BRIDGENAME="BRQ"
> GATEWAY="192.168.0.1"
> BRIDGE_IP="192.168.0.122"
> BRIDGE_NETMASK="255.255.255.0"
> STP_ON="yes"
> STP_PRIO="1"
> RETVAL=0
>
> start() {
>         echo "Starting service bridge"
>        ifconfig eth2 promisc up
>         ifconfig eth3 promisc up
>         brctl addbr $BRIDGENAME  ||  return=$rc_failed
>         brctl addif $BRIDGENAME eth2  ||  return=$rc_failed
>         brctl addif $BRIDGENAME eth3  ||  return=$rc_failed
>         ifconfig eth2 0.0.0.0  ||  return=$rc_failed
>         ifconfig eth3 0.0.0.0  ||  return=$rc_failed
>         brctl sethello $BRIDGENAME 1  ||  return=$rc_failed
>         brctl setmaxage $BRIDGENAME 4  ||  return=$rc_failed
>         brctl setfd $BRIDGENAME 4  ||  return=$rc_failed
>         brctl stp $BRIDGENAME $STP_ON
>         brctl setbridgeprio $BRIDGENAME $STP_PRIO
>         ifconfig $BRIDGENAME $BRIDGE_IP netmask $BRIDGE_NETMASK up
>
>         ip route flush cache
>         ip route add default via $GATEWAY
>
> But the problem i have is that i am not able to contact the bridge on its IP
> 192.168.0.122 i am running Centos 4.4 on a 2.6.18 kernel, i have tested this
> setup on 3 different sets of network cards tg3, b44, via-rhine and in all of
> them i have the same results no connection, i know the bridge is working
> otherwise packets couldnt flow on the network, im using bridge utils 1.0.4-4
>
> If any one knows what could be wrong??
>
> Thanks
>   
Check output of brctl showstp $BRIDGENAME
Did you remember to wait until forwarding delay expires (you set it to 4 
seconds).