vMotion VLAN or just any IP address will do ?

I had this question after viewing VM networking best practice and design consideration ?.

Rack server deployment

Hi All,

I ned to know if I required to have dedicated VLAN in my Cisco 3850 switch configured or do I just use any IP address that is not in used outside the VM Network VLAN for the vMotion network ?
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Senior IT System EngineerIT ProfessionalAsked:
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justadadConnect With a Mentor Commented:
For a dedicated network, just install another switch that is not connected to the rest of your Cisco switches or only connected to the rest of your network through a management VLAN and port.

We use a dedicated VLAN for VMotion on a fabric extender connected to a Cisco Nexus 7K switch. You could create a VLAN on your 3850 that never leaves that device on any trunk port.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You can use either, best practice is to use a dedicated network, if you have access to VLANS use and configure them!

otherwise just use a different IP Address Range e.g. 10.10.x.x or 172.16.x.x, better than nothing and using the extisting network.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Hi Andrew, how to create Dedicated network ?
If the servers are traditional rack server and normal CISCO switches.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
how many network interfaces do you have ?

dedicated network using VLANS or network interfaces ?
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Senior IT System EngineerIT ProfessionalAuthor Commented:
As per the diagram above,
I've dedicated 2X NIC ports for Vmotion per server.
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
OKay, so on your dedicated private network,, just use a different IP Address 10.10.x.x or 172.16.x.x
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Thanks !
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
no problems
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