Linux Ethernet Bridging - Apr 2007 - [Bridge] STP problem

Hi all, 
 I have to use STP function between too bridges. The network topology are:
 /--------------\ / ------ Wireless Link ----\ /--------------------\
|=3D=3DLAN1=3D=3D| ---- | BRIDGE 1| | BRIDGE 2| -----| =3D=3D=3DLAN 2=3D=3D=3D |
\---------------/ \ -----TINC vpn tunnel ------/ \---------------------/
 When one of link failed the ping from one to other site stop to works. 
I use bridge-utils-1.0.6 and tinc-1.0.4 
 I wait any suggestion about this
 Daniel 
  The bridege setup script is: 
  
#! /bin/bash

PATH=3D$PATH:/usr/local/sbin:/sbin
BR=3Dbr0
IP=3D"172.16.3.223 <http://172.16.3.223>"
MASK=3D"255.255.252.0 <http://255.255.252.0>"
BROADCAST=3D"172.16.3.255 <http://172.16.3.255>"

return=3D$rc_done
case "$1" in

start)
echo "Starting service bridge $BR"
tincd -n vpn
brctl addbr $BR
brctl setbridgeprio $BR 0 || return=3D$rc_failed
brctl addif $BR eth0 || return=3D$rc_failed
brctl addif $BR eth1 || return=3D$rc_failed
brctl addif $BR vpn || return=3D$rc_failed
ifconfig eth0 0.0.0.0 <http://0.0.0.0> || return=3D$rc_failed
ifconfig eth1 0.0.0.0 <http://0.0.0.0> || return=3D$rc_failed
ifconfig vpn 0.0.0.0 <http://0.0.0.0> || return=3D$rc_failed
brctl sethello $BR 1 || return=3D$rc_failed
brctl setmaxage $BR 4 || return=3D$rc_failed
brctl setpathcost $BR eth1 100 || return=3D$rc_failed

brctl setpathcost $BR vpn 100 || return=3D$rc_failed
brctl setportprio $BR eth1 20 || return=3D$rc_failed
brctl setportprio $BR vpn 20 || return=3D$rc_failed
# brctl setageing $BR 20 || return=3D$rc_failed
brctl setfd $BR 4 || return=3D$rc_failed
brctl stp $BR on
/sbin/ifconfig $BR inet $IP netmask $MASK broadcast $BROADCAST up
echo -e "$return"
;;

stop)
tincd -k -n vpn
/sbin/ifconfig $BR down
echo "Shutting down service bridge $BR"
brctl delif $BR vpn || return=3D$rc_failed
brctl delif $BR eth0 || return=3D$rc_failed
brctl delif $BR eth1 || return=3D$rc_failed
brctl delbr $BR || return=3D$rc_failed
rmmod bridge || return=3D$rc_failed
echo -e "$return"
;;

status)
ifconfig $BR
brctl showstp $BR
brctl show
;;

restart)
$0 stop && $0 start || return=3D$rc_failed
;;

*)

echo "Usage: $0 {start|stop|status|restart}"
exit 1
esac

test "$return" =3D "$rc_done" || exit 1
exit 0
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Daniel,

I have couple of questions here to help to close on to
the cause of the problem.

Does it happen [ping stops working] in any case (when
ANY of the links fail)?

You might consider [both scenarios] setting only one
link to be tunnel between your LANs, and see what then
will happen with ping, this test scenarios might help:
LAN1 -- BRIDGE1 -- Wireless Link -- BRIDGE2 -- LAN2
or
LAN1 -- BRIDGE1 -- TINC vpn tunnel -- BRIDGE2 -- LAN2

Regards,
Zoran

--- Daniel Gheorghica <gheodan@gmail.com> wrote:
> Hi all, 
>  I have to use STP function between too bridges. The
> network topology are:
>  /--------------\ / ------ Wireless Link ----\
> /--------------------\
> |==LAN1==| ---- | BRIDGE 1| | BRIDGE 2| -----|
> ===LAN 2=== | 
> \---------------/ \ -----TINC vpn tunnel ------/
> \---------------------/
>  When one of link failed the ping from one to other
> site stop to works. 
> I use bridge-utils-1.0.6 and tinc-1.0.4 
>  I wait any suggestion about this
>  Daniel 
>   The bridege setup script is: 
>   
> #! /bin/bash
> 
> PATH=$PATH:/usr/local/sbin:/sbin
> BR=br0
> IP="172.16.3.223 <http://172.16.3.223>"
> MASK="255.255.252.0 <http://255.255.252.0>"
> BROADCAST="172.16.3.255 <http://172.16.3.255>"
> 
> return=$rc_done
> case "$1" in
> 
> start)
> echo "Starting service bridge $BR"
> tincd -n vpn
> brctl addbr $BR
> brctl setbridgeprio $BR 0 || return=$rc_failed
> brctl addif $BR eth0 || return=$rc_failed
> brctl addif $BR eth1 || return=$rc_failed
> brctl addif $BR vpn || return=$rc_failed
> ifconfig eth0 0.0.0.0 <http://0.0.0.0> ||
> return=$rc_failed
> ifconfig eth1 0.0.0.0 <http://0.0.0.0> ||
> return=$rc_failed
> ifconfig vpn 0.0.0.0 <http://0.0.0.0> ||
> return=$rc_failed
> brctl sethello $BR 1 || return=$rc_failed
> brctl setmaxage $BR 4 || return=$rc_failed
> brctl setpathcost $BR eth1 100 || return=$rc_failed
> 
> brctl setpathcost $BR vpn 100 || return=$rc_failed
> brctl setportprio $BR eth1 20 || return=$rc_failed
> brctl setportprio $BR vpn 20 || return=$rc_failed
> # brctl setageing $BR 20 || return=$rc_failed
> brctl setfd $BR 4 || return=$rc_failed
> brctl stp $BR on
> /sbin/ifconfig $BR inet $IP netmask $MASK broadcast
> $BROADCAST up
> echo -e "$return"
> ;;
> 
> stop)
> tincd -k -n vpn
> /sbin/ifconfig $BR down
> echo "Shutting down service bridge $BR"
> brctl delif $BR vpn || return=$rc_failed
> brctl delif $BR eth0 || return=$rc_failed
> brctl delif $BR eth1 || return=$rc_failed
> brctl delbr $BR || return=$rc_failed
> rmmod bridge || return=$rc_failed
> echo -e "$return"
> ;;
> 
> status)
> ifconfig $BR
> brctl showstp $BR
> brctl show
> ;;
> 
> restart)
> $0 stop && $0 start || return=$rc_failed
> ;;
> 
> *)
> 
> echo "Usage: $0 {start|stop|status|restart}"
> exit 1
> esac
> 
> test "$return" = "$rc_done" || exit 1
> exit 0


		
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