[Xen-users] Slow Windows Server 2008 network speed.

[John McMonagle <johnm@xxxxxxxxxxx>]

Setup a new Windows 2008  server under xen.
Networking seems fine in all cases other than out going to an external host.
The following were all run as "iperf -c host  -l1m -w32k"  on the problem 
server 2008 domu.

To dom0 4.02 Gbits/sec
To linux domu on same box  4.10 Gbits/sec
To external host  246 Kbits/sec! 
Yes that is Kbits/sec! 
Incoming is OK.
linux pv domu OK

Have another very similar setup and it is OK.
I copied everything I can think of from the other system.

debian 2.6.32 64bit xen kernel
xen 4.1.2 from source
driver is Univention signed 0.11.0.308 PV driver
Using trend micro for anti virus.

config:
import os, re
arch_libdir = 'lib'
arch = os.uname()[4]
if os.uname()[0] == 'Linux' and re.search('64', arch):
    arch_libdir = 'lib64'

#----------------------------------------------------------------------------

kernel = "/usr/lib/xen/boot/hvmloader"
builder='hvm'
memory = 3000
vcpus = 2
shadow_memory = 16
name = "neets"
vif = [ 'type=ioemu, bridge=xenbr0, mac=00:16:3e:64:6a:56' ]
acpi = 1
apic = 1
disk = [ 'phy:/dev/xvg0/neets-c,hda,w', 
'file:/extra/iso/wserver2008.iso,hdc:cdrom,r', 'phy:/dev/cdrom,hdd:cdrom,r' ]
device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'

#-----------------------------------------------------------------------------
# boot on floppy (a), hard disk (c) or CD-ROM (d)
# default: hard disk, cd-rom, floppy
boot="dc"
sdl=0
vnc=1
vncconsole=1
vncpasswd=''
vnclisten='0.0.0.0'
serial='pty'
usbdevice='tablet'
localtime=1
on_xend_stop = 'shutdown'
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'

Any suggestions?

Thanks

John
 

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