[Bridge] Bug? Some interfaces not forwarding

Rus Foster twattycake at gmail.com
Mon Feb 21 07:18:15 PST 2011


We've got an issue with some Xen guests and not forwarding packets on
the bridge for some interfaces but not all others

The main server is 109.169.72.130.

The bridge is eth0 (with peth0)

The IP 109.169.72.249 assigned to vifvm6039.0 works

The IP 109.169.72.251 assigned to vifvm5927.0 doesn't


[root at 8 tmp]# brctl show
bridge name	bridge id		STP enabled	interfaces
eth0		8000.0025901d7134	yes		vifvm5955.0
							tap46.0
							vifvm5911.0
							tap45.0
							vifvm5927.0
							vifvm5912.0
							tap43.0
							vifvm5967.0
							tap40.0
							vifvm5913.0
							vifvm6043.0
							vifvm6032.0
							vifvm6021.0
							vifvm5953.0
							vifvm5907.0
							vifvm5954.0
							tap11.0
							vifvm6039.0
							vifvm6038.0
							tap4.0
							vifvm5919.0
							tap3.0
							vifvm5915.0
							peth0


[root at 8 tmp]# brctl showmacs eth0
port no	mac addr		is local?	ageing timer
  1	00:0d:29:43:df:ae	no		   0.18
 14	00:16:3e:0f:9b:6c	no		   0.53
 16	00:16:3e:14:26:36	no		  24.73
  7	00:16:3e:1d:7e:40	no		 104.61
  5	00:16:3e:37:62:9f	no		  55.77
 18	00:16:3e:47:27:f9	no		 102.34
 12	00:16:3e:70:56:f2	no		 103.13
 17	00:16:3e:75:4a:a5	no		 101.74
 19	00:16:3e:75:f4:b1	no		  40.01
 23	00:16:3e:76:f7:4d	no		  33.89
 13	00:16:3e:79:84:cb	no		 105.13
 15	00:16:3e:7a:59:ac	no		  26.46
  2	00:16:3e:8d:1e:4d	no		   0.20
  8	00:16:3e:96:47:c6	no		 105.13
 10	00:16:3e:9f:3a:69	no		  14.17
 21	00:16:3e:bc:c6:46	no		 102.14
  9	00:16:3e:f2:03:05	no		  11.45
  1	00:23:9c:12:a1:80	no		   0.00
  1	00:25:90:1d:71:34	yes		   0.00
 23	3a:48:46:fa:0f:f3	yes		   0.00
  2	62:7b:18:61:a1:f7	yes		   0.00
 21	66:c2:21:04:72:26	yes		   0.00
 19	7a:8b:f3:51:81:f4	yes		   0.00
 10	a6:7f:67:8e:e5:45	yes		   0.00
  5	c2:2d:30:b5:8e:44	yes		   0.00
  7	ca:a1:4b:0f:7d:c9	yes		   0.00
 13	fe:ff:ff:ff:ff:ff	yes		   0.00

root at 8 tmp]# uname -a
Linux 8.xn.nj.damnvps.com 2.6.18-243.el5xen #1 SMP Mon Feb 7 19:07:01
EST 2011 x86_64 x86_64 x86_64 GNU/Linux
[root at 8 tmp]# cat /etc/redhat-release
CentOS release 5.5 (Final)




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