Well I think my problem is solved. Someone else pointed out that sometimes a guest system's clock stops advancing and causes a problem with the kernel's network stack:

http://www.linuxquestions.org/questions/linux-server-73/centos52-vmware-host-stops-responding-on-network-661399/

I have always noticed my guest systems' clocks always ran significantly slower than the host's clock. I did some searching and found that one workaround for this was to add the flags "nosmp noapic nolapic" to the boot kernel's entry in grub:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1420

My guests have been up for almost a week now so far with no ill effects. *crossfingers*

- Joe


--------------------------------------------------
From: "Mark Haney" <[EMAIL PROTECTED]>
Sent: Friday, August 08, 2008 9:30 AM
To: "For users of Fedora" <fedora-list@redhat.com>
Subject: Re: [OT] Problem with Centos52 and VMware?

Joe Tseng wrote:
Nothing unusual appears IIRC when I run ifconfig. I am unable to ping anything on the network and I also ran "network restart" but to no avail. So far only a full restart would make the problem go away.

I just realized I haven't looked at my logs; I'll check that out later.


Please don't top post.  It makes it hard to keep track of the thread.

Sounds like the NIC driver is bombing. What NIC is it and what does lsmod show before and after the failure? Seems to me the problem is the NIC module is hanging up and on a restart gets unloaded and loaded up again fixing the hang.


--
Libenter homines id quod volunt credunt -- Caius Julius Caesar


Mark Haney
Sr. Systems Administrator
ERC Broadband
(828) 350-2415

Call (866) ERC-7110 for after hours support

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