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Re: [Xen-users] intermittent network hangs



> I've seen this pattern on hosts with errors in the bridge config.
> Especially when more than one bridge was used.

Ah, good to hear.

> The default spanning tree ageing time is set to 300 secs. That's more
> than your ~10 minutes, though.

And the problem may happen more frequently than 10 minutes, I've just only 
noticed
it while in coding roughly that often.  I've done nothing at all to configure or
change the configuration of the bridges, as I remember it, it all just worked 
out
of the box.  All of my domains have "vif = [ 'bridge=xen-br0' ]" -- is that a
problem?

> 'brctl showstp xen-br0' and
> 'brctl showmacs xen-br0'

# brctl showmacs xen-br0
port no mac addr                is local?       ageing timer
  1     00:00:0c:07:ac:01       no                 4.78
  1     00:02:b3:1e:36:15       no               296.86
  1     00:02:b3:4b:cf:1f       no                 0.15
  1     00:02:b3:4b:cf:8d       no               299.25
  1     00:03:ba:65:fe:db       no                36.73
  1     00:03:ba:d0:2a:f7       no               106.00
  1     00:03:ff:1f:36:15       no                63.28
  1     00:04:00:12:b0:4c       no                51.13
  1     00:06:5b:39:c8:20       no                 8.43
  1     00:06:5b:3e:c6:25       no               163.45
  1     00:06:5b:ec:3a:a1       no                 2.76
  1     00:06:5b:f3:42:48       no                12.03
  1     00:06:5b:f4:a9:61       no                17.32
  1     00:06:5b:f4:a9:69       no                 2.39
  1     00:0b:db:a8:a8:e9       no                34.92
  1     00:0d:56:fd:9a:bb       no                74.03
  1     00:0d:bc:8d:38:da       no                 1.57
  1     00:0f:1f:03:f9:0f       no               163.29
  1     00:0f:1f:04:7c:e3       no                36.59
  1     00:0f:1f:04:7c:e9       no                39.61
  1     00:0f:1f:64:a0:9a       yes                0.00
  1     00:0f:1f:65:b8:53       no               211.43
  1     00:0f:1f:6b:b2:89       no                39.68
  1     00:0f:1f:9d:18:30       no                77.91
  1     00:10:18:06:5d:4b       no                26.58
  1     00:11:43:de:20:58       no                 6.83
  1     00:30:48:20:ab:17       no                 0.56
  1     00:30:48:20:ae:3a       no               295.75
  1     00:30:48:20:ae:6e       no                98.88
  1     00:80:72:09:8a:f4       no                13.11
  1     00:90:27:86:f7:b9       no                25.31
  1     00:90:27:e5:3a:af       no                 2.11
  1     00:90:27:e5:3f:66       no                32.59
  1     00:b0:d0:20:5e:1a       no                95.73
  1     00:b0:d0:20:5e:79       no                22.35
  1     00:b0:d0:20:f0:43       no                30.34
  1     00:b0:d0:49:2d:2b       no                97.35
  1     00:b0:d0:49:c5:b1       no                13.12
  1     00:b0:d0:68:1c:97       no                20.86
  1     00:b0:d0:fc:01:a2       no                10.18
  1     00:d0:01:88:ec:0a       no                 0.00
  1     00:d0:b7:74:b6:1e       no                82.95
  1     00:d0:b7:74:b7:a3       no                36.52
  1     00:d0:b7:84:a8:fc       no                28.91
  1     00:d0:b7:91:5b:f6       no                39.66
  1     08:00:20:cd:84:c0       no                 0.12
  1     08:00:20:cd:b5:53       no               259.89
  1     08:00:20:d2:2e:17       no               170.59
  1     08:00:20:fe:61:16       no               127.50
  1     08:00:20:fe:a2:5c       no                 8.44
  3     aa:00:00:07:82:1e       no                 3.49
  5     aa:00:00:0b:16:e3       no                 0.01
  2     aa:00:00:0c:fc:84       no                34.63
  4     aa:00:00:50:55:f8       no                 8.44
  2     fe:ff:ff:ff:ff:ff       yes                0.00



# brctl showstp xen-br0
xen-br0
 bridge id              8000.000f1f64a09a
 designated root        8000.000f1f64a09a
 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             0.00                 bridge forward delay       0.00
 ageing time             300.00
 hello timer               0.06                 tcn timer                  0.00
 topology change timer     0.00                 gc timer                   5.27
 flags


eth0 (1)
 port id                8001                    state                forwarding
 designated root        8000.000f1f64a09a       path cost                  4
 designated bridge      8000.000f1f64a09a       message age timer          0.00
 designated port        8001                    forward delay timer        0.00
 designated cost           0                    hold timer                 0.00
 flags

vif25.0 (2)
 port id                8002                    state                forwarding
 designated root        8000.000f1f64a09a       path cost                100
 designated bridge      8000.000f1f64a09a       message age timer          0.00
 designated port        8002                    forward delay timer        0.00
 designated cost           0                    hold timer                 0.00
 flags

vif26.0 (3)
 port id                8003                    state                forwarding
 designated root        8000.000f1f64a09a       path cost                100
 designated bridge      8000.000f1f64a09a       message age timer          0.00
 designated port        8003                    forward delay timer        0.00
 designated cost           0                    hold timer                 0.00
 flags

vif27.0 (4)
 port id                8004                    state                forwarding
 designated root        8000.000f1f64a09a       path cost                100
 designated bridge      8000.000f1f64a09a       message age timer          0.00
 designated port        8004                    forward delay timer        0.00
 designated cost           0                    hold timer                 0.00
 flags

vif28.0 (5)
 port id                8005                    state                forwarding
 designated root        8000.000f1f64a09a       path cost                100
 designated bridge      8000.000f1f64a09a       message age timer          0.00
 designated port        8005                    forward delay timer        0.00
 designated cost           0                    hold timer                 0.00
 flags


Thanks...





-- 
John Madden
UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmadden@xxxxxxxxxxx


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