[CentOS] Networking just stopped working

[Kahlil Hodgson]

On 06/07/10 22:48, Les Mikesell wrote:
> Chan Chung Hang Christopher wrote:
>> Christopher Chan wrote:
>>> And now the thing is working again...
>>
>> It's not working again.
>>
>> Running tcpdump -i vlan seems to trigger something to get the network 
>> working again but as soon as I stop tcpdump...nada, zip, zilch.
>>

If you have two machines on the same network with the same IP address
you get behaviour like this.  Had this happen once when an engineer
reset a UPSs and it took on the IP address of a main switch.
arpwatch is your friend.

K