[CentOS] Networking just stopped working

Thu Jul 8 12:51:26 UTC 2010
Les Mikesell <lesmikesell at gmail.com>

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.

   Les Mikesell
    lesmikesell at gmail.com