Hello all. I've gone in circles on search engines and here trying to find an answer. It's shocking how common this problem is, that it affects servers so should have a very high priority for somebody at MS to look into, and yet notbody has ever found an answer that I can see. Most posts I see are older though so I am hoping July 2013 has some answers :)
In short, I believe the problem may have begun 2 days ago when we replaced the building's only network switch with a new Cisco 2960-S switch. These are simple GbE switches that work out of the box so nothing new has been configured. I do intend to further configure at some point but this was an emergency replacement.
Yet the Hyper-V host (2008 R2) is now showing VMSMP Event ID 28 messages in the System Log at a rate of about 30,000,000 entries per day. Any time I look, there are about 46,000 entries, if I Clear Log and count to 10, refresh and I have between 3000-5000 more entries. I guess 46,000 is the limit before older ones start ot disappear.
The VM's appear to be unaffected, but because I exclusively RDP to just the host machine and use Hyper-V manager to access the VM's, I can't be sure. No users have complained yet.
However my RDP session freuqntly needs a refresh due to disconnect so clearly this problem affects the host.
NIC setup is:
4 physical NIC.
4 VMs
VM1 is the primary AD DC, and shares the NIC with the host. The other 3 NIC's are dedicated to the other 3 VMs.
The 4th VM though is not in use yet, so in theory the 4th physical NIC is free, however I'm afraid to try to use it for VM1 (thus breaking the "share with host" relationship) because being a little fresh on these subjects I"m not sure what that'll do to the IP address of the AD DC, which if I mess that up brings down the network for the users.
Of course I'd rather solve the VMSMP problem but as a workaround, can I just assign the 4th NIC to the VM1? I'm doing this remotely too, so don't want to uncheck "share with mgmt OS" and cut myself off...
Btw, I did try to set static MAC addresses for each VM - no change. This has never worked for anybody in any post/thread I've seen either if that says anything.
Totally lost, please help!