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Beginner

Nexus 5548 - Server Group Complaining of Slow Windows 2012 Copie

Darren... We are using the Qlogic 8242 NIC

Steve... These are state of the art 1000gig RAM and multiple Quad cores Servers... I will certianly pass along the link you sent me. I will try to post the NETSH asap

Enthusiast

Re: Nexus 5548 - Server Group Complaining of Slow Windows 2012 C

I would bet on bad firmware and drivers. We saw an issue where we could only push 3Gb on the 8242 running ESX 4.1 VMs and required QL to make changes in the firmware and driver. Then once they believed it was fixed, we found we could only push 6Gb if we used port1, but 9Gb on port2. QL fixed that with a firmware change but then we upgraded from ESX 4.1 to ESX 5 and could only push 8G. Was not an issue on 4.1 or 5.1 only ESX 5. They have since fixed that for us too. We have never seen any performance issues on Windows 2008 bare metal, but the issues on ESX indicated there could also be issues on Win2012 bare metal with new drivers, and IMO QL seems to be very sloppy with their QA process.

It took several months back in Dec 2011 to convince them of our 3Gb issue, but now I have contacts inside QL and they take us seriously instead of the stupid and time wasting suggestions you typically get from Tier1 support.

Here is a Win2008 8242 Tolly test that is pretty much what we saw in our perf testing....

http://www.qlogic.com/Resources/Documents/MediaCoverage/Tolly211109QLogicCNAPerformanceAndFailover.pdf

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Enthusiast

Re: Nexus 5548 - Server Group Complaining of Slow Windows 2012 C

One note to add, we did have a file copy speed issue around 2 years ago with QL 8152/W2008 and it ended up being the storage driver. Did not see the issue with performance testing but resulted in very slow file copy. Also, below are some Cisco docs on 10G windows setup and VM perf testing.

http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/C07-572828-00_10Gb_Conn_Win_DG.pdf

http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/c07-601040-00_vm_10gbn_dn_v2a.pdf

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Hall of Fame Community Legend

Nexus 5548 - Server Group Complaining of Slow Windows 2012 Copie

Steve & Darren,

Nice read. 

Engager

Re:Nexus 5548 - Server Group Complaining of Slow Windows 2012 Co

H Tom,

Did you make any progress with this? I'm intrigued as to what the problem is/was.

Regards

Sent from Cisco Technical Support Android App

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Enthusiast

Nexus 5548 - Server Group Complaining of Slow Windows 2012 Copie

Why not run LACP?

Engager

Nexus 5548 - Server Group Complaining of Slow Windows 2012 Copie

Hi Steven,

From what Tom has told us the throughput that was being achieved was only around 500mbps so not enough to fill a single GE link, let alone the 10GE link that was being used. In this case aggregating links would have made no difference.

Also note that link aggregation doesn't actually increase the throughout for a single conversation as all traffic for a conversation can only be carried across a single link of the aggregate. This is to ensure ordered delivery of packets.

The concept of a conversation can vary though, with traffic balanced across the links in the aggregate based on a combination of source and/or destination MAC, IP and TCP/UDP port number, depending what is available and configured on the platform.

Regards

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