Hyper-V Network Performance

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hyper-v server (windows server 2008 r2) 2 guests - 1. windows server 2008 r2 , 2. windows 7 professional (both default settings installation). testing network performance ubuntu server 11.10 iperf 2.0.2:

1. windows server 2008 r2

c:\program files (x86)>iperf -c 172.16.200.12

------------------------------------------------------------

client connecting 172.16.200.12, tcp port 5001

tcp window size: 8.00 kbyte (default)

------------------------------------------------------------

[156] local 172.16.100.19 port 49376 connected 172.16.200.12 port 5001

[ id] interval       transfer     bandwidth

[156]  0.0-10.0 sec   358 mbytes   300 mbits/sec

2. windows 7

c:\program files (x86)\iperf>iperf -c 172.16.200.12

------------------------------------------------------------

client connecting 172.16.200.12, tcp port 5001

tcp window size: 64.0 kbyte (default)

------------------------------------------------------------

[  3] local 172.16.200.11 port 59005 connected 172.16.200.12 port 5001

[ id] interval       transfer     bandwidth

[  3]  0.0-10.0 sec   720 mbytes   603 mbits/sec

 

why have got different results 2 guest os residing on same hyper-v host? can achieve on guest windows server 2008 r2 @ least same results on windows 7? default tcp windows size values come from?

first thing check - hyper-v server patched , have integration components in vm been updated?

(open vm console hyper-v manager , run through insert integration services disk action , install / upgrade wizard in console of vm).

second - tcp task offloading - disable settings.

http://social.technet.microsoft.com/forums/en-us/winserverhyperv/thread/d90e5265-de70-4ea0-9396-401a0eacdde7

brian ehlert (hopefully have found useful) http://itproctology.blogspot.com
learn. apply. repeat.


Windows Server  >  Hyper-V



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