Toconfigure a vCon and the associated vNICs and vHBAs for explicit assignment, do the following:
• Set the vCon configuration to any of the available options. Youcan configure the vCons through a
vNIC/vHBAplacement policy or in the service profile associated with the server. If a vCon is configured
forAll, you can still explicitly assign a vNIC or vHBA to that vCon.
•Assignthe vNICs and vHBAs to a vCon. You can make this assignment through the VirtualHost Interface
Placementproperties of the vNIC or vHBA or in the service profile associated with the server.
Ifyou attemptto assign a vNIC or vHBA to a vCon that is not configured for that type of vNIC or vHBA,
CiscoUCS Manager displays a messagebox to advise you ofthe configurationerror.
Duringservice profile association, Cisco UCS Manager validates the configured placement of the vNICs and
vHBAsagainst the number and capabilities of the physical adapters in the server before assigning the vNICs
andvHBAs according to the configuration in the policy. Load distribution is based upon the explicit assignments
tothe vCons and adapters configured in this policy.
Ifthe adapters do not support the assignment of one or more vNICs or vHBAs, Cisco UCS Manager raises a
faultagainst the service profile.
vConto adapter assignment occurs in a round-robin order. This order means that vNICs are placed on the
adaptersin the following order: vcon-1, vcon-3, vcon-2, vcon-4. As a result, under the following
circumstances,the PCIE order of vNICs can be different than the explicit assignment configured in Cisco
UCSManager:
Note
• In a server with two adapters when vNICs are explicitly assigned to all four vCons.
• When a service profile that includes explicit assignmentis migrated from a server with a higher
numberof adapters to one with a lowernumber of adapters.
Implicit Assignment of vNICs and vHBAs
Withimplicit assignment, Cisco UCS Manager determines the vCon and, therefore, the adapter to which a
vNICor vHBA is assigned according to the capability of the adapter. Use this assignment option if the adaptor
towhich a vNIC or vHBA is assigned is not important to your system configuration.
Toconfigure a vCon for implicit assignment, do the following:
• Set the vCon configuration to All,Exclude Dynamic, or Exclude Unassigned. Youcan configure the
vConsthrough a vNIC/vHBAplacement policy or in the service profile associated with the server.
• Do not set the vCon configuration to Exclude Assigned. Implicit assignment cannot be performed with
thissetting.
• Do not assign any vNICs or vHBAs to a vCon.
Duringservice profile association, Cisco UCS Manager verifies the number and capabilities of the physical
adaptersin the server and assigns the vNICs and vHBAs accordingly. Load distribution is based upon the
capabilitiesof the adapters, and placement of the vNICs and vHBAs is performed according to the actual
orderdetermined by the system. For example, if one adapter can accommodate more vNICs than another, that
adapteris assigned more vNICs.
Ifthe adapters cannot support the number of vNICs and vHBAs configured for that server, Cisco UCS Manager
raisesa fault againstthe service profile.
Cisco UCS Manager GUI Configuration Guide, Release 2.0
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Configuring vNIC/vHBA Placement Policies