exchange 2007 transfer rate 1mips on LAN inside hyperVM

[[OUPA]MrNutz]

Hi peeps.

So we have obtained some HP DL380G6 servers to upgrade from our 150 G2 servers..

We are running win2k3 as DC with exchange2000....

We have already migrated the exchange to 2007 but this is inside the hyperVM ...

The transfer rate of the win2k8r2 server is about 40-50MB/sec and the hyperVM session aswell 35-45MB/sec...

My question....

Our clients on the lan can maximum pull 1Mbps (as indicated by resource meter) - customers are complaining...nics are set to 10Gbps.....

But like i said - the o/s itself is fine and the transfer rate inside and outside the hyperVM is also fine..

Its just a question of the exchange only pumping at 1Mbps. (1mips).

Exchange2000 is online still - 1 more mailbox to be moved but i can see alot of daily traffic being used by that machine's NIC..99.9% of the other mailboxes have been moved over to exchange2007.

Any ideas on the speed on exchange07?

 

[ramar]

Wild guess but could it have something to do with TCP offloading?

Might be an option to try disabling TCP offloading at the driver NIC level. Search technet forums for HyperV TCP offloading. I remember reading some stuff about it a while ago.

Also, assume you have run windows updates on the VMs.

 

[Pada]

We had sort of the same issue with our server, where the network card ran at 10Mbps half-duplex instead of 100Mbps full duplex, causing collisions and what not, resulting in 180kB/s transfer rates!
I think we simply changed to the 2nd Ethernet port on the same machine, so we didn't really solve the problem.

 

[Juggy]

If it's running in HyperV are you sure you don't have a disk IO issue?

 

[[OUPA]MrNutz]

lets say i copy something like win.xp.sp3 which is about 300MB from our patch_update/server....if i pull it from there onto the hyperV session (which contains exchange) or even to the outside environment (the win2k8r2) , it goes fast....no IO issues...

i don't think its the nic since both the o/s and the vm inside performs well..its just exchange that crawls...

exchange taking ALOT of memory - 18GIG! - have 24 gig avail