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April 9th, 2015 03:00
Flow control and Jumbo Mtu
Hi,
I have document from Dell "Win-Hyperv-2012OS-Config". It state that before installing EQL HIT kit we need to configure network (Broadcom Advanced Configuration Suite (BACS) tool) like:
| Option |
Value |
| Flow control |
Rx & Tx Enabled |
| Jumbo Mtu |
9014 |
Does this applies to native Windows 2012 teaming configuration?
Now I see MTU is configured 1500 on all nics, should it be changed and why?
Thanks
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Origin3k
4 Operator
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2.3K Posts
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April 9th, 2015 13:00
You dont use NIC Teaming on a Windows Host when having a EQL Storage. You will see weird behaviour like errors when trying to write to a volume and having only a single connection (because HIT things that there is only one NIC).
Under special workloads and environments a MTU of 9000 (Jumbo) *can* give you a better performance. For sure you will see a higher latency.
You have to setup your pSwitch first and than the Driver/NIC within the Host OS. The EQL use JumboFrames automaticly if the initiator logs in succesfully with a MTU of 9000. Check the "reporting" tab within the EQL GroupManager. Hold the mouse on one of the initiator login messages and look at the end of the line.
Regards,
Joerg