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setting priority for SIP calls or a vswitch - vSphere - ESXi

I have two nics on my ESXi v4.1 server.  I have two vswitches.  One has my twp SIP servers that have public IP's associated to the VM's.  The other vswitch has a series of private IP's associated to the VM's.  I want to set priority on the vswitch and/or all traffic from the vswitch that has my two SIP servers.  What's the easiest way to accomplish this?
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Larry LarmeuPrincipal ConsultantCommented:
The only QoS function available on a vSwitch is outbound policing.  You could upgrade to the Cisco Nexus virtual switch for more QoS capability.  Check this article for more info:

gopher_49Author Commented:
What about setting up VLANS and setting priority to VLANS?
Larry LarmeuPrincipal ConsultantCommented:
You can create Port Groups and assign VLAN tags to them but the VLANs and priority cannot be created at the vSwitch level, it has to be done outside of the vSwitch, and the priority will not apply at the vSwitch level.

What you could do is dedicate specific NICs to a vSwitch that is dedicated only for SIP.
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