Windows Server 2008 network speed slow, Xen 3.4.3 HVM ISO
- by Elliot.Bradshaw
I've setup a VM running Windows Server 2008 on a host node running Xen 3.4.3-5 and the following kernel: 2.6.18-308.1.1.el5xen #1 SMP Wed Mar 7 05:38:01 EST 2012 i686 i686 i386 GNU/Linux
The network speed on the VM is very slow--using the online speed tests I can only get it up to 8-9mbps. The line is 100mbps burstable and the host node has no problem achieving those speeds. If it setup a VM running CentOS, it too has no problems achieving those speeds.
I've done some pretty exhaustive troubleshooting, but nothing has helped:
New VM installations of Win2k8 do have the same network problem.
Upgrading to most recent kernel-xen did not help (2.6.18-308.1.1.el5xen).
Upgrading from xen 3.4.0 to xen 3.4.3-5 did not help.
Disabling Windows firewall, etc did not help.
Changing network card device config from auto negotiation to manually be 100mbps full duplex did not help.
Changing the network receive buffer packet size did not help (tried all combos from 64k to 8k).
At this point I'm pretty much out of ideas--any help would be appreciated!
