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Joachim Schiele

2009-Oct-25 00:38 UTC

[Bridge] using a bridge (setting priority eth0 > ath0)

hello,

what i want to do:
having two computers both equipped with:
lspci
01:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit 
Ethernet (rev 10)
01:0a.0 Ethernet controller: Atheros Communications Inc. AR5212/AR5213 
Multiprotocol MAC/baseband processor (rev 01)

i create two bridges (one on each host)
pc2b ~ # brctl show br0
bridge name     bridge id               STP enabled     interfaces
br0             0000.0040f4a0b037       yes             ath0
                                                        eth0

and then i set all interfaces up using:
ip l set ath0 up
ip l set eth0 up
ip l set br0 up

i put one ath0 interface into master mode and the other ath0 is a normal 
station (client). the connections eth0-eth0 works great, also the ath0-ath0 
link works great (tested with and without bridge).

in general everything works, if i either one of the 4 interfaces down 
(eth0/eth0/ath0/ath0) stp's work creates a working path in no time.

the issue is - the reason i write to this list however:
when all interfaces are up the data always is going over ath0-ath0 instead of 
eth0-eth0. (the wireless lan should be my backup link).

i issues setbridgeprio br0 1 and setbridgeprio br0 10. as well as setpathcost 
with various consistent experiments. say one experiment i set all ath0 
pathcosts to a value 100 all eth0 to 999. 
i don't see any difference when doing the opposite.

any idea? 

dmesg added but i don't see anything special there. there was an error once 
but i think that might have something todo with the routing loop i caused 
(which i resolved with adding setfd with a higher value).

thanks,
joachim schiele





============ pc2 =============dmesg
br0: port 2(ath0) entering forwarding state
br0: topology change detected, propagating
br0: port 1(eth0) entering forwarding state
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
br0: no IPv6 routers present
br0: received tcn bpdu on port 1(eth0)
br0: topology change detected, propagating
br0: port 2(ath0) entering disabled state
br0: port 2(ath0) entering listening state
br0: port 2(ath0) entering learning state
br0: topology change detected, propagating
br0: port 2(ath0) entering forwarding state
ath0: no IPv6 routers present
br0: received tcn bpdu on port 1(eth0)
br0: topology change detected, propagating
br0: port 2(ath0) entering disabled state
br0: port 2(ath0) entering listening state
br0: port 2(ath0) entering learning state
br0: topology change detected, propagating
br0: port 2(ath0) entering forwarding state
ath0: no IPv6 routers present
br0: received tcn bpdu on port 1(eth0)
br0: topology change detected, propagating

ip l
14: ath0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UNKNOWN
    link/ether 00:40:f4:a0:b0:37 brd ff:ff:ff:ff:ff:ff
3: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast
state UP qlen 1000
    link/ether 00:40:f4:eb:16:45 brd ff:ff:ff:ff:ff:ff

pc2b ~ # brctl show
bridge name     bridge id               STP enabled     interfaces
br0             0000.0040f4a0b037       yes             ath0
                                                        eth0
pc2b ~ # brctl showstp br0
br0
 bridge id              0000.0040f4a0b037
 designated root        0000.0040f4a0b037
 root port                 0                    path cost                  0
 max age                   9.99                 bridge max age             
9.99
 hello time                1.99                 bridge hello time          
1.99
 forward delay             2.99                 bridge forward delay       
2.99
 ageing time               3.99
 hello timer               1.49                 tcn timer                  
0.00
 topology change timer     0.00                 gc timer                   
1.49
 flags


ath0 (2)
 port id                0402                    state                
forwarding
 designated root        0000.0040f4a0b037       path cost                999
 designated bridge      0000.0040f4a0b037       message age timer          
0.00
 designated port        0402                    forward delay timer        
0.00
 designated cost           0                    hold timer                 
0.48
 flags

eth0 (1)
 port id                2801                    state                
forwarding
 designated root        0000.0040f4a0b037       path cost                111
 designated bridge      0000.0040f4a0b037       message age timer          
0.00
 designated port        2801                    forward delay timer        
0.00
 designated cost           0                    hold timer                 
0.48
 flags

arp -e
10.0.0.1                 ether   00:40:f4:a0:b0:00   C                     br0









============ pc6 =============ip l
17: ath0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP
    link/ether 00:40:f4:a0:b0:00 brd ff:ff:ff:ff:ff:ff
3: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast
state UP qlen 1000
    link/ether 00:40:f4:ec:59:06 brd ff:ff:ff:ff:ff:ff

dmesg
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
__ratelimit: 9560 callbacks suppressed
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
eth0: received packet with  own address as source address
br0: port 2(ath0) entering disabled state
__ratelimit: 7851 callbacks suppressed
eth0: received packet with  own address as source address
br0: port 2(ath0) entering listening state
br0: port 2(ath0) entering learning state
br0: topology change detected, sending tcn bpdu
br0: port 2(ath0) entering forwarding state
br0: port 2(ath0) entering disabled state
eth0: received packet with  own address as source address
br0: port 2(ath0) entering listening state
br0: port 2(ath0) entering learning state
br0: topology change detected, sending tcn bpdu
br0: port 2(ath0) entering forwarding state
br0: port 2(ath0) entering disabled state
eth0: received packet with  own address as source address
br0: port 2(ath0) entering listening state
br0: port 2(ath0) entering learning state
br0: topology change detected, sending tcn bpdu
br0: port 2(ath0) entering forwarding state

arp -e
PC2                      ether   00:40:f4:a0:b0:37   C                     br0

pc2b ~ # brctl  show
bridge name     bridge id               STP enabled     interfaces
br0             0000.0040f4a0b037       yes             ath0
                                                        eth0
pc2b ~ # brctl showstp br0
br0
 bridge id              0000.0040f4a0b037
 designated root        0000.0040f4a0b037
 root port                 0                    path cost                  0
 max age                   9.99                 bridge max age             
9.99
 hello time                1.99                 bridge hello time          
1.99
 forward delay             2.99                 bridge forward delay       
2.99
 ageing time               3.99
 hello timer               1.20                 tcn timer                  
0.00
 topology change timer     0.00                 gc timer                   
0.20
 flags


ath0 (2)
 port id                0402                    state                
forwarding
 designated root        0000.0040f4a0b037       path cost                999
 designated bridge      0000.0040f4a0b037       message age timer          
0.00
 designated port        0402                    forward delay timer        
0.00
 designated cost           0                    hold timer                 
0.20
 flags

eth0 (1)
 port id                2801                    state                
forwarding
 designated root        0000.0040f4a0b037       path cost                111
 designated bridge      0000.0040f4a0b037       message age timer          
0.00
 designated port        2801                    forward delay timer        
0.00
 designated cost           0                    hold timer                 
0.20
 flags

Nicolas de Pesloüan

2009-Oct-27 22:55 UTC

head link

[Bridge] using a bridge (setting priority eth0 > ath0)

Joachim Schiele wrote:> hello,
> 
> what i want to do:
> having two computers both equipped with:
> lspci
> 01:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169
Gigabit
> Ethernet (rev 10)
> 01:0a.0 Ethernet controller: Atheros Communications Inc. AR5212/AR5213 
> Multiprotocol MAC/baseband processor (rev 01)
For this kind of setup, if might be easier to setup a bonding interface, instead
of a bridge interface.

With a bonding setup, you can define a primary adapter that will be used when
available.

	Nicolas.
> 
> i create two bridges (one on each host)
> pc2b ~ # brctl show br0
> bridge name     bridge id               STP enabled     interfaces
> br0             0000.0040f4a0b037       yes             ath0
>                                                         eth0
> 
> and then i set all interfaces up using:
> ip l set ath0 up
> ip l set eth0 up
> ip l set br0 up
> 
> i put one ath0 interface into master mode and the other ath0 is a normal 
> station (client). the connections eth0-eth0 works great, also the ath0-ath0
> link works great (tested with and without bridge).
> 
> in general everything works, if i either one of the 4 interfaces down 
> (eth0/eth0/ath0/ath0) stp's work creates a working path in no time.
> 
> the issue is - the reason i write to this list however:
> when all interfaces are up the data always is going over ath0-ath0 instead
of
> eth0-eth0. (the wireless lan should be my backup link).
> 
> i issues setbridgeprio br0 1 and setbridgeprio br0 10. as well as
setpathcost
> with various consistent experiments. say one experiment i set all ath0 
> pathcosts to a value 100 all eth0 to 999. 
> i don't see any difference when doing the opposite.
> 
> any idea? 
> 
> dmesg added but i don't see anything special there. there was an error
once
> but i think that might have something todo with the routing loop i caused 
> (which i resolved with adding setfd with a higher value).
> 
> thanks,
> joachim schiele
> 
> 
> 
> 
> 
> ============ pc2 =============> dmesg
> br0: port 2(ath0) entering forwarding state
> br0: topology change detected, propagating
> br0: port 1(eth0) entering forwarding state
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> br0: no IPv6 routers present
> br0: received tcn bpdu on port 1(eth0)
> br0: topology change detected, propagating
> br0: port 2(ath0) entering disabled state
> br0: port 2(ath0) entering listening state
> br0: port 2(ath0) entering learning state
> br0: topology change detected, propagating
> br0: port 2(ath0) entering forwarding state
> ath0: no IPv6 routers present
> br0: received tcn bpdu on port 1(eth0)
> br0: topology change detected, propagating
> br0: port 2(ath0) entering disabled state
> br0: port 2(ath0) entering listening state
> br0: port 2(ath0) entering learning state
> br0: topology change detected, propagating
> br0: port 2(ath0) entering forwarding state
> ath0: no IPv6 routers present
> br0: received tcn bpdu on port 1(eth0)
> br0: topology change detected, propagating
> 
> ip l
> 14: ath0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
noqueue
> state UNKNOWN
>     link/ether 00:40:f4:a0:b0:37 brd ff:ff:ff:ff:ff:ff
> 3: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast
> state UP qlen 1000
>     link/ether 00:40:f4:eb:16:45 brd ff:ff:ff:ff:ff:ff
> 
> pc2b ~ # brctl show
> bridge name     bridge id               STP enabled     interfaces
> br0             0000.0040f4a0b037       yes             ath0
>                                                         eth0
> pc2b ~ # brctl showstp br0
> br0
>  bridge id              0000.0040f4a0b037
>  designated root        0000.0040f4a0b037
>  root port                 0                    path cost                 
0
>  max age                   9.99                 bridge max age             
> 9.99
>  hello time                1.99                 bridge hello time          
> 1.99
>  forward delay             2.99                 bridge forward delay       
> 2.99
>  ageing time               3.99
>  hello timer               1.49                 tcn timer                  
> 0.00
>  topology change timer     0.00                 gc timer                   
> 1.49
>  flags
> 
> 
> ath0 (2)
>  port id                0402                    state                
> forwarding
>  designated root        0000.0040f4a0b037       path cost               
999
>  designated bridge      0000.0040f4a0b037       message age timer          
> 0.00
>  designated port        0402                    forward delay timer        
> 0.00
>  designated cost           0                    hold timer                 
> 0.48
>  flags
> 
> eth0 (1)
>  port id                2801                    state                
> forwarding
>  designated root        0000.0040f4a0b037       path cost               
111
>  designated bridge      0000.0040f4a0b037       message age timer          
> 0.00
>  designated port        2801                    forward delay timer        
> 0.00
>  designated cost           0                    hold timer                 
> 0.48
>  flags
> 
> arp -e
> 10.0.0.1                 ether   00:40:f4:a0:b0:00   C                    
br0
> 
> 
> 
> 
> 
> 
> 
> 
> 
> ============ pc6 =============> ip l
> 17: ath0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
noqueue
> state UP
>     link/ether 00:40:f4:a0:b0:00 brd ff:ff:ff:ff:ff:ff
> 3: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast
> state UP qlen 1000
>     link/ether 00:40:f4:ec:59:06 brd ff:ff:ff:ff:ff:ff
> 
> dmesg
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> __ratelimit: 9560 callbacks suppressed
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> eth0: received packet with  own address as source address
> br0: port 2(ath0) entering disabled state
> __ratelimit: 7851 callbacks suppressed
> eth0: received packet with  own address as source address
> br0: port 2(ath0) entering listening state
> br0: port 2(ath0) entering learning state
> br0: topology change detected, sending tcn bpdu
> br0: port 2(ath0) entering forwarding state
> br0: port 2(ath0) entering disabled state
> eth0: received packet with  own address as source address
> br0: port 2(ath0) entering listening state
> br0: port 2(ath0) entering learning state
> br0: topology change detected, sending tcn bpdu
> br0: port 2(ath0) entering forwarding state
> br0: port 2(ath0) entering disabled state
> eth0: received packet with  own address as source address
> br0: port 2(ath0) entering listening state
> br0: port 2(ath0) entering learning state
> br0: topology change detected, sending tcn bpdu
> br0: port 2(ath0) entering forwarding state
> 
> arp -e
> PC2                      ether   00:40:f4:a0:b0:37   C                    
br0
> 
> pc2b ~ # brctl  show
> bridge name     bridge id               STP enabled     interfaces
> br0             0000.0040f4a0b037       yes             ath0
>                                                         eth0
> pc2b ~ # brctl showstp br0
> br0
>  bridge id              0000.0040f4a0b037
>  designated root        0000.0040f4a0b037
>  root port                 0                    path cost                 
0
>  max age                   9.99                 bridge max age             
> 9.99
>  hello time                1.99                 bridge hello time          
> 1.99
>  forward delay             2.99                 bridge forward delay       
> 2.99
>  ageing time               3.99
>  hello timer               1.20                 tcn timer                  
> 0.00
>  topology change timer     0.00                 gc timer                   
> 0.20
>  flags
> 
> 
> ath0 (2)
>  port id                0402                    state                
> forwarding
>  designated root        0000.0040f4a0b037       path cost               
999
>  designated bridge      0000.0040f4a0b037       message age timer          
> 0.00
>  designated port        0402                    forward delay timer        
> 0.00
>  designated cost           0                    hold timer                 
> 0.20
>  flags
> 
> eth0 (1)
>  port id                2801                    state                
> forwarding
>  designated root        0000.0040f4a0b037       path cost               
111
>  designated bridge      0000.0040f4a0b037       message age timer          
> 0.00
>  designated port        2801                    forward delay timer        
> 0.00
>  designated cost           0                    hold timer                 
> 0.20
>  flags
> _______________________________________________
> Bridge mailing list
> Bridge at lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/bridge
>

Linux Ethernet Bridging - Oct 2009 - [Bridge] using a bridge (setting priority eth0 > ath0)

[Bridge] using a bridge (setting priority eth0 > ath0)

[Bridge] using a bridge (setting priority eth0 > ath0)