Michael Leun
2012-Jul-23 07:42 UTC
[Bridge] [3.5 regression / bridge] constantly toggeling between disabled and forwarding
Hi, when I use my usb ethernet adapter # > lsusb [...] Bus 002 Device 009: ID 9710:7830 MosChip Semiconductor MCS7830 10/100 Mbps Ethernet adapter [...] as port of an bridge> # brctl addbr br0 > # brctl addif br0 eth0 > # brctl addif br0 ue5 > # ifconfig ue5 up > # ifconfig br0 up(Also does happen when eth0 is not part of the bridge, but the logs I had available were from that situation...) I constantly get messages showing the interface toggeling between disabled and forwarding state: Jul 23 07:40:50 elektra kernel: [ 1539.497337] br0: port 2(ue5) entered disabled state Jul 23 07:40:50 elektra kernel: [ 1539.554992] br0: port 2(ue5) entered forwarding state Jul 23 07:40:50 elektra kernel: [ 1539.555005] br0: port 2(ue5) entered forwarding state Jul 23 07:40:51 elektra kernel: [ 1540.496242] br0: port 2(ue5) entered disabled state Jul 23 07:40:51 elektra kernel: [ 1540.552534] br0: port 2(ue5) entered forwarding state Jul 23 07:40:51 elektra kernel: [ 1540.552548] br0: port 2(ue5) entered forwarding state Jul 23 07:40:52 elektra kernel: [ 1541.550413] br0: port 2(ue5) entered forwarding state Jul 23 07:40:53 elektra kernel: [ 1542.529672] br0: port 2(ue5) entered disabled state Jul 23 07:40:53 elektra kernel: [ 1542.587162] br0: port 2(ue5) entered forwarding state Jul 23 07:40:53 elektra kernel: [ 1542.587175] br0: port 2(ue5) entered forwarding state Jul 23 07:40:54 elektra kernel: [ 1543.585309] br0: port 2(ue5) entered forwarding state Jul 23 07:41:00 elektra kernel: [ 1549.360600] br0: port 2(ue5) entered disabled state Jul 23 07:41:00 elektra kernel: [ 1549.442998] br0: port 2(ue5) entered forwarding state Jul 23 07:41:00 elektra kernel: [ 1549.443011] br0: port 2(ue5) entered forwarding state Jul 23 07:41:01 elektra kernel: [ 1550.357686] br0: port 2(ue5) entered disabled state Jul 23 07:41:01 elektra kernel: [ 1550.408208] br0: port 2(ue5) entered forwarding state Jul 23 07:41:01 elektra kernel: [ 1550.408222] br0: port 2(ue5) entered forwarding state Jul 23 07:41:02 elektra kernel: [ 1551.407656] br0: port 2(ue5) entered forwarding state Jul 23 07:41:03 elektra kernel: [ 1552.401578] br0: port 2(ue5) entered disabled state Jul 23 07:41:03 elektra kernel: [ 1552.474773] br0: port 2(ue5) entered forwarding state Jul 23 07:41:03 elektra kernel: [ 1552.474786] br0: port 2(ue5) entered forwarding state Jul 23 07:41:04 elektra kernel: [ 1553.472487] br0: port 2(ue5) entered forwarding state Jul 23 07:41:05 elektra kernel: [ 1554.356138] br0: port 2(ue5) entered disabled state [...] This does (in the same situation, nothing else than the kernel changed) not happen with 3.4.5. Does anybody have an idea what the issue might be or do I need to bisect? -- MfG, Michael Leun
Stephen Hemminger
2012-Jul-23 15:02 UTC
[Bridge] [3.5 regression / bridge] constantly toggeling between disabled and forwarding
On Mon, 23 Jul 2012 09:15:04 +0200 Michael Leun <lkml20120218 at newton.leun.net> wrote:> Hi, > > when I use my usb ethernet adapter > > # > lsusb > [...] > Bus 002 Device 009: ID 9710:7830 MosChip Semiconductor MCS7830 10/100 Mbps Ethernet adapter > [...] > > as port of an bridge > > > # brctl addbr br0 > > # brctl addif br0 eth0 > > # brctl addif br0 ue5 > > # ifconfig ue5 up > > # ifconfig br0 up > > (Also does happen when eth0 is not part of the bridge, but the logs I > had available were from that situation...) > > I constantly get messages showing the interface toggeling between > disabled and forwarding state: > > Jul 23 07:40:50 elektra kernel: [ 1539.497337] br0: port 2(ue5) entered disabled state > Jul 23 07:40:50 elektra kernel: [ 1539.554992] br0: port 2(ue5) entered forwarding state > Jul 23 07:40:50 elektra kernel: [ 1539.555005] br0: port 2(ue5) entered forwarding state > Jul 23 07:40:51 elektra kernel: [ 1540.496242] br0: port 2(ue5) entered disabled state > Jul 23 07:40:51 elektra kernel: [ 1540.552534] br0: port 2(ue5) entered forwarding state > Jul 23 07:40:51 elektra kernel: [ 1540.552548] br0: port 2(ue5) entered forwarding state > Jul 23 07:40:52 elektra kernel: [ 1541.550413] br0: port 2(ue5) entered forwarding state > Jul 23 07:40:53 elektra kernel: [ 1542.529672] br0: port 2(ue5) entered disabled state > Jul 23 07:40:53 elektra kernel: [ 1542.587162] br0: port 2(ue5) entered forwarding state > Jul 23 07:40:53 elektra kernel: [ 1542.587175] br0: port 2(ue5) entered forwarding state > Jul 23 07:40:54 elektra kernel: [ 1543.585309] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:00 elektra kernel: [ 1549.360600] br0: port 2(ue5) entered disabled state > Jul 23 07:41:00 elektra kernel: [ 1549.442998] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:00 elektra kernel: [ 1549.443011] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:01 elektra kernel: [ 1550.357686] br0: port 2(ue5) entered disabled state > Jul 23 07:41:01 elektra kernel: [ 1550.408208] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:01 elektra kernel: [ 1550.408222] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:02 elektra kernel: [ 1551.407656] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:03 elektra kernel: [ 1552.401578] br0: port 2(ue5) entered disabled state > Jul 23 07:41:03 elektra kernel: [ 1552.474773] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:03 elektra kernel: [ 1552.474786] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:04 elektra kernel: [ 1553.472487] br0: port 2(ue5) entered forwarding state > Jul 23 07:41:05 elektra kernel: [ 1554.356138] br0: port 2(ue5) entered disabled state > [...] > > This does (in the same situation, nothing else than the kernel changed) > not happen with 3.4.5. > > Does anybody have an idea what the issue might be or do I need to bisect?Probably not a bridge issue, but rather an issue with link status reporting on the device. The bridge changes state when the attached ethernet device raises/lowers carrier. An independent way to observe link changes is to use a tool like: ip monitor which will show carrier up/down events.