Stephen Hemminger schrieb: 

Did the bridge get set up right? Did the interfaces come up (look at 'brctl showstp br0')
$ ifconfig eth0 0.0.0.0 down
$ ifconfig eth1 0.0.0.0 down
$ brctl addbr br0
$ brctl stp br0 on
$ brctl addif br0 eth0
$ brctl addif br0 eth1
$ ifconfig eth0 0.0.0.0 up
$ ifconfig eth1 0.0.0.0 up
$ ifconfig br0 0.0.0.0 up

$ brctl showmacs br0
port no mac addr                is local?       ageing timer
  1     00:11:22:33:44:50       yes                0.00
  2     00:11:22:33:44:51       yes                0.00
  2     00:11:95:34:af:01       no                 2.91
  2     00:c0:02:39:53:52       no                 2.76
$ brctl showstp br0
br0
 bridge id              8000.001122334450
 designated root        8000.001122334450
 root port                 0                    path cost                  0
 max age                  20.00                 bridge max age            20.00
 hello time                2.00                 bridge hello time          2.00
 forward delay            15.00                 bridge forward delay      15.00
 ageing time             300.00
 hello timer               1.45                 tcn timer                  0.00
 topology change timer     0.00                 gc timer                 273.04
 flags


eth0 (1)
 port id                8001                    state                  learning
 designated root        8000.001122334450       path cost                100
 designated bridge      8000.001122334450       message age timer          0.00
 designated port        8001                    forward delay timer        3.48
 designated cost           0                    hold timer                 0.44
 flags

eth1 (2)
 port id                8002                    state                  learning
 designated root        8000.001122334450       path cost                100
 designated bridge      8000.001122334450       message age timer          0.00
 designated port        8002                    forward delay timer        3.45
 designated cost           0                    hold timer                 0.43
 flags



The bridge is sensitive to the network devices reporting carrier properly,
so a bad network driver or card will make it not work.



--
Jürgen Pfeiffer

* mailto:j.pfeiffer@seskion.de
SesKion Softwareentwicklung und System Konzeption GmbH

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