Mapping the Router Network Interfaces to vNICs
Cisco Catalyst 8000V maps the GigabitEthernet network interfaces to the logical virtual network interface card (vNIC) name assigned by the VM. The VM in turn maps the logical vNIC name to a physical MAC address.
When you boot the Cisco Catalyst 8000V instance for the first time, the router interfaces are mapped to the logical vNIC interfaces that were added when the VM was created. The following image shows the relationship between the vNICs and the Cisco Catalyst 8000V router interfaces.
After you boot the Cisco Catalyst 8000V instance, you need to display the mapping between the logical interface on the router with the vNIC and the vNIC MAC address using the show platform software vnic-if interface-mapping command. The output for this command depends on your Cisco IOS XE release version.
Note |
GigabitEthernet0 interface is no longer supported. |
Router# show platform software vnic-if interface-mapping
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Interface Name Short Name vNIC Name Mac Addr
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GigabitEthernet2 Gi2 eth2 (vmxnet3) 0050.5689.0034
GigabitEthernet1 Gi1 eth1 (vmxnet3) 0050.5689.000b
--------------------------------------------------------------------------
The vNIC name shown in the display is a logical interface that the Cisco Catalyst 8000V instance uses to map to the interface on the hypervisor. It does not always map to the corresponding NIC name added during the VM installation. For example, the logical “eth1” vNIC name in the display may not necessarily map to “NIC1” that was added in the VM installation process.
Caution |
It is important that you verify the interface mapping before you begin configuring the Gigabit Ethernet network interfaces onCisco Catalyst 8000V. This ensures that the network interface configuration applies to the correct physical MAC address interface on the VM host. |
If you reboot the router and do not add or delete any vNICs, the interface mapping remains the same as before. If you reboot the router and delete vNICs, ensure that the configuration for the remaining interfaces remains intact. For more information, see Adding and Deleting Network Interfaces on Cisco Catalyst 8000V.