VMQ configuration

[New Account]

Can someone point me into some definitive VMQ configuration documentation that is specific to UCS?

I'm trying to set VMQs on 4 vNics but every time I reboot the profile, some of the VIF paths come up and some don't depending on the configuration of the VMQ + interrupts. 

I've read a lot about the number of VMQs etc but nothing definitive.

For example, how many interrupts vs VMQs?

If there is a maximum of 128VMQs per adapter, can that say be spread across 4 vNics? How many interrupt per vNic then?

[Qiese Dides]

Hi,

Hopefully this will answer your question below is an example with a configuration failure due to VMQ;

 When attempting to associate, we would receive the following error:

'not enough vNIC avalable; connection-placement; There are not enough resources overall'

The reason in this instance that we were receiving the above error was because of VMQ configuration.

The total customer had two VMQ connection policies: VMQ-1 and VMQ-2

VMQ-1 VMQ connection policy had it's number of VMQ set to 12, while VMQ-2 VMQ connection policy was configured for 50 VMQ.  The Service profile had the following vNICs:

vNICs - VMQ:
vnic1 - 0
vnic2 - 50 - VMQ-2
vnic3 - 50 - VMQ-2
vnic4 - 50 - VMQ-2
vnic5 - 12 - VMQ-1
vnic6 - 50 - VMQ-2
vnic7 - 50 - VMQ-2

Total number of VMQ from above configuration is 262 VMQs

The maximum allowed VMQ on any supporting adapter is 128 VMQ.  If it exceeds 128 VMQ on any adapter, the profile association will fail with the errors mentioned above.

To fix this, we modified the VMQ-2 connection policy (LAN > Policies > root/sub-org > VMQ Connection Policies) to only include 10 VMQ instead of 50.  This made the total VMQ for the Service Profile only 62 VMQ.  Once this config change had been made, we were able to successfully associate the profile to the blade.

Additional info for VMQ creation and application:

http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/sw/gui/config/guide/2-2/b_UCSM_GUI_Configuration_Guide_2_2/b_UCSM_GUI_Configuration_Guide_2_2_chapter_010101.html#d71329e5581a1635

Articles with extensive information regarding VMQ application:

http://blogs.technet.com/b/networking/archive/2013/09/10/vmq-deep-dive-1-of-3.aspx

http://blogs.technet.com/b/networking/archive/2013/09/10/vmq-deep-dive-2-of-3.aspx

http://blogs.technet.com/b/networking/archive/2013/09/10/vmq-deep-dive-3-of-3.aspx

Please let me know if you have any other questions.

Regards,

Qiese Dides

[New Account]

Thanks for the reply.

I have seen that reply in a different post but have another question.

I'm trying to set VMQ acorss 4 vnics and no matter what I set, when I run get-netadaptervmq in windows, its shows as disabled.

I definitely have VMQ connection policy applied and the latest drivers installed but it just doesn't want to 'enable'