topic Re: Flexpod and degraded speeds on LACP configuration in FlexPod Discussions

Flexpod and degraded speeds on LACP configuration

ThePoster — Thu, 05 Jun 2025 04:39:08 GMT

Hello everyone,

I am experiencing some odd transfer speeds on my SAN.

Quick background, I am running a single core nexus 3064 10gb, which connects to 2x cisco UCS hosts running vmware, which connect to 2 isolated 3064 10gb which then connect to a FAS2552 (see attached image)

When i test speeds between devices i get the following results:

vm on ucs1 local disk --> lun ::: this starts around 1.2GBps transfer speeds and drops after seconds and fluctuates between 80 & 250MBps

vm on ucs2 local disk --> lun ::: this starts around 1.2GBps and lasts ~twice as long as ucs1 then fluctuates betweeen 50 & 60MBps

vm on ucs2 lun --> lun attached to ucs1 ::: starts around 300MBps and fluctuates between 50 & 60MBps

vm on ucs2 lun --> lun attached to the same server, but presented as a different drive, starts at 300 and drops to 50-60mbps

simple copy and pasting file into the excat same location eg e:\test.txt to e:\test_copy.txt starts at 200, drops to 100-160mbps.

There is definitely something wrong here i just cant put my finger on it will all the device involved in a flexpod solution.

Guidance would be greatly appreciated.

James

Re: Flexpod and degraded speeds on LACP configuration

mharding — Wed, 06 May 2015 17:17:45 GMT

James, have you solved your problem yet? Obvioulsy if you have a serious problem impacting your production enviroment you should contact our support team. Otherwise, I have sent a note around the product team here to see how we can help with related config info.

Re: Flexpod and degraded speeds on LACP configuration

mharding — Thu, 07 May 2015 18:53:02 GMT

Here's some advice from the team: take a look at this design guide: http://www.netapp.com/us/media/tr-4331.pdf

It's a recent FlexPod implementation guide with what they think are relevant details on configuration, which may help with your issue.

Re: Flexpod and degraded speeds on LACP configuration

ThePoster — Mon, 11 May 2015 01:17:08 GMT

Thanks mharding, just the documenation i was looking for.

Will read and let you know how i go

James