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hostasaurus
Enthusiast
Enthusiast

Can a pNIC be in more than one VDS/distributed port group?

Hi all, I'm investigating a switch from Cisco UCS hardware to traditional servers.  In UCS land, we present a bunch of what appear to be physical NICs to vSphere, since behind the scenes that traffic gets routed out of UCS redundantly and we don't need vSphere/vCenter to know how that works.  We have VDS's for vm networks, vmotion, and fault tolerance, each with their own 'physical' NIC.  Every network within each of these VDS's is a tagged VLAN and UCS just allows that to pass through.

I have my new traditional server joined to the cluster, deployed each of the three VDS's to vSphere, and as part of that process, created dvuplink interfaces with the physical NICs bound to them.  Unfortunately I realized after the third that this sequence of steps would take the physical NIC away from the previous dvuplink interface, leaving the first two unusable.

Is it possible to have the same physical NIC joined to more than one VDS?  They're all VLAN tagged, so from the NIC's perspective, it woudln't really care, and vSphere would also know which network / VDS traffic was for.

Thanks

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2 Replies
daphnissov
Immortal
Immortal

No, a vmnic (a physical NIC to ESXi) can only be a member of one vSS or one vDS at a time.

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IRIX201110141
Champion
Champion

Does the Server/pNIC supports nPAR? If so you can divide the pNIC into 4 slices/parts and the ESXi see 4 vmnics. These vmnics can assign to different Uplinks == vSwitches(vSS,vDS).

Regards,

Joerg

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