Router Interfaces
The Cisco CSR 1000v router interfaces perform the same functionality as those on hardware-based Cisco
routers. The Cisco CSR 1000v interfaces function as follows:
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Interfaces are logically named as the Gigabit Ethernet (GE) interfaces.
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The available interface numbering depends on the Cisco CSR 1000v version.
(Cisco IOS XE Release 3.11S and later, and Denali 16.2 and later) The interface numbering is as follows:
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Interface port numbering is from 1 and up to the number of interfaces supported.
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GigabitEthernet interface 0 is no longer supported beginning with this release.
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You can designate any interface as the management interface. You can change the management
interface when deploying the OVA template on first-time installation.
(Cisco IOS XE Release 3.10S and earlier) The interface numbering is as follows:
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Interface port numbering is from 0 and up to the number of interfaces supported.
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Gigabit Ethernet interface 0 is reserved for the management interface used for obtaining the licenses
and upgrading software.
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At first boot, the Cisco CSR 1000v router interfaces are mapped to the vNIC interfaces on the VM based
on the vNIC enumeration to the Cisco CSR 1000v; on subsequent boot, the Cisco CSR 1000v router
interfaces are mapped to the vNIC MAC address
If upgrading to Cisco IOS XE Release 3.11S from an earlier release, we recommend you update your
configuration to remove the GigabitEthernet 0 management interface before upgrading. Because the
GigabitEthernet 0 interface is no longer supported beginning with Cisco IOS XE Release 3.11S, you will
receive system errors if the upgraded configuration includes this interface.
Caution
For more information, see the
Mapping Cisco CSR 1000v Network Interfaces to VM Network Interfaces
Virtual Machine Requirements
The Cisco CSR 1000v runs only on a virtual machine. This section describes the virtual machine requirements
for the router.
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Virtual Machines, on page 8
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Hypervisor Support, on page 8
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Server Requirements, on page 26
Cisco CSR 1000v Series Cloud Services Router Software Configuration Guide
7
Cisco CSR 1000v Series Cloud Services Router Overview
Router Interfaces
