VMQ and RSS

[goapps.us]

We are setting up a HV cluster on 4 b200M4 blades with 1340 VIC's. Each hosts has 9 NIC for various workloads. 

I was able to tune and edit the VMQ settings, but I'm not finding a lot of information about editing RSS queues for the vNIC's. The only option I can find is how to enable it in my adapter policy. 

Outside of "enabling" does UCS allow you to edit your RSS queues/settings? 

Thanks 

[Walter Dey · Accepted solution]

Configuring an Ethernet Adapter Policy

Procedure

	Command or Action	Purpose
Step 1	UCS-A# scope org org-name	Enters organization mode for the specified organization. To enter the root organization mode, type / as the org-name .
Step 2	UCS-A /org # create eth-policy policy-name	Creates the specified Ethernet adapter policy and enters organization Ethernet policy mode.
Step 3	UCS-A /org/eth-policy # set comp-queue count count	(Optional) Configures the Ethernet completion queue.
Step 4	UCS-A /org/eth-policy # set descr description	(Optional) Provides a description for the policy. Note    If your description includes spaces, special characters, or punctuation, you must begin and end your description with quotation marks. The quotation marks will not appear in the description field of any show command output.
Step 5	UCS-A /org/eth-policy # set failover timeout timeout-sec	(Optional) Configures the Ethernet failover.
Step 6	UCS-A /org/eth-policy # set interrupt {coalescing-time sec | coalescing-type {idle | min} | count count | mode {intx | msi | msi-x}}	(Optional) Configures the Ethernet interrupt.
Step 7	UCS-A /org/eth-policy # set offload {large-receive | tcp-rx-checksum | tcp-segment | tcp-tx-checksum} {disabled | enabled}	(Optional) Configures the Ethernet offload.
Step 8	UCS-A /org/eth-policy # set recv-queue {count count | ring-size size-num}	(Optional) Configures the Ethernet receive queue.
Step 9	UCS-A /org/eth-policy # set rss receivesidescaling {disabled | enabled}	(Optional) Configures the RSS.
Step 10	UCS-A /org/eth-policy # set trans-queue {count count | ring-size size-num}	(Optional) Configures the Ethernet transmit queue.
Step 11	UCS-A /org/eth-policy # commit-buffer	Commits the transaction to the system configuration.

[goapps.us]

Thank you Walter

At this moment, here is the output of the "get-netadapterrss | ft" on my 2012r2 host https://www.evernote.com/l/ADlvvvG911lAb4QHy2HlCdIbcA6Yb66BWMk. Notice the right most column.  

I know that the 3 following resources values must comply with specific ratios (https://www.evernote.com/l/ADlnRITIgNBCdo_p4VIxYlAizG77VlQ6f04).  With this in mind, which of the Queues will affect the number of available rss queues available to a HV host. 

Thanks 

[Aaron Sampliner]

Hello,

Have you taken a look at this thread on the support forums?

https://supportforums.cisco.com/discussion/12285321/vmq-connection-policy-windows-2012r2-hyper-v-cluster

There's also a very in depth article from microsoft on VMQ: http://blogs.technet.com/b/networking/archive/2013/09/10/vmq-deep-dive-1-of-3.aspx

[goapps.us]

Hello Aaron, 

Thank you for your update, yes I'm very familiar with the technet blogs. In fact I've been in contact with the authors. 

But my specific UCS question is still unanswered. How can you affect the number of RSS queues available to a vNic. At this point, because RSS and VMQ are so tightly integrated, I suspect the VMq adapter policy is actually controlling the RSS values. I'm going to test today and update this post. 

Thanks