[CentOS] Networking just stopped working
Chan Chung Hang Christopher
christopher.chan at bradbury.edu.hk
Thu Jul 8 14:21:59 UTC 2010
Les Mikesell wrote:
> Chan Chung Hang Christopher wrote:
>> Christopher Chan wrote:
>>> On Thursday, July 08, 2010 05:09 PM, Kahlil Hodgson wrote:
>>>> On 07/08/2010 05:08 PM, Christopher Chan wrote:
>>>>>> Hmmm ... which bond mode are you using?
>>>>> Why mode 4 of course.
>>>> Ouch. Never used that mode.
>>> Huh? Like why? It's the recommended mode unless the switch does not
>>> suppoprt it or the boards don't.
>>>
>> Oh sorry, got a bit grouchy there. I don't like overtime and was getting
>> tired too. Did not read your mail properly.
>>
>
> I think some bridge or vlan scenarios require promiscuous mode (and the
> corresponding disabling of hardware acceleration). Maybe the real issue is that
> something accidentally disabled it and you now only work when tcpdump
> re-enables it. I'm not sure how this is supposed to be managed atomically when
> multiple programs may manipulate it and it needs to be propagated across
> multiple bonded nics, but maybe something went wrong there. At least some
> things log the change so maybe you can get a hint about when it was turned on
> and off.
>
/me wonders if the loading of the bridge and another related module has
anything to do with this.
I'll prepare a list of targets for rmmod.
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