This chapter contains the following sections:
Cisco Nexus 1000V Multi-Hypervisor
Cisco Nexus 1000V
uses a multi-hypervisor licensing approach, which allows you to migrate a license from
one Cisco Nexus 1000V switch platform type to another. For example, you can
migrate the license from a Cisco Nexus 1000V for VMware switch to a Cisco Nexus 1000V for
The Cisco Nexus 1000V multi-hypervisor
licenses have the following editions:
licenses are required. All basic features are available and all
Virtual Ethernet Modules (VEMs) are automatically licensed to use these basic
features. The necessary default licenses are automatically checked out from the
Cisco license pool.
license is required for each CPU socket on each VEM in order to use the
advanced features. When the switch is configured with the Advanced edition
license, the switch checks out the appropriate licenses from the license pool.
edition license includes the following features:
You can switch
between the editions at any time as long as you have the appropriate licenses
available for the Advanced edition. All modules must use either the Essential
edition or the Advanced edition. You cannot mix the two and have some modules
use the Essential edition while others use the Advanced edition.
You can use the
edition command to display the current switch edition and other
Changing from the Essential to the Advanced Edition
When you reconfigure the switch to use the Advanced edition by using the svs switch edition advanced command, the software immediately checks out the required licenses for all the modules present in the system.
If the number of licenses required is more than the number of licenses available, an error message appears and the reconfiguration fails. You must obtain additional licenses to operate the switch in the Advanced edition and activate the advanced features. The number of licenses available and the number of licenses required is shown in the error message.
Changing from the Advanced to the Essential Edition
When you reconfigure the switch to use the Essential edition by using the svs switch edition essential command, the software immediately returns any checked out licenses to the Cisco license pool.
If the license check-in process fails and a module still has licenses checked out, you must use the license transfer command to manually transfer these licenses back to the license pool.
Before configuring the switch edition to use the Essential edition, you must disable all the advanced features by using the no feature command. The change to the Essential edition fails if any advanced feature is enabled.
Licensing and High Availability
- License installation is a nondisruptive process.
- The license file is shared by both Virtual Supervisor Modules (VSMs) in an HA pair.
- If your system has dual supervisors, the licensed software runs on both supervisor modules and provides failover protection.
- Uninstalling a license file may result in a service disruption.
Types of Licenses
1024 default licenses
preinstalled with the
Cisco Nexus 1000V software
that are valid for
days from the date of VSM installation. These default licenses allow you to use
Cisco Nexus 1000V Advanced
Edition for a
trial period before you must purchase permanent licenses.
Default licenses are
invalidated when one of the following occurs:
You install a
permanent license file.
You install an
evaluation license file.
trial period expires.
Disruption—Even though virtual Ethernet (vEthernet) interfaces are not dropped
on unlicensed VEMs, the following events might affect the vEthernet interfaces:
interfaces are not brought up.
If you need
additional licenses to cover all VEM CPU sockets, you must obtain either
permanent licenses or evaluation licenses from Cisco.com. For additional
licensing information, contact your Cisco representative or visit
Cisco Nexus 1000V
permanent licenses do not expire. You can purchase permanent licenses for a
fixed number of VEM CPU sockets. You need one license for each CPU socket on
each VEM. The license file specifies the number of licenses that you have
When you upgrade to
a new software release, all previously installed permanent licenses remain in
When you purchase
permanent licenses, make sure to request enough licenses to cover all of the
CPU sockets in the CPUs in all of your VEMs. If you do not have enough licenses
available to cover all of the CPU sockets on a particular VEM, no licenses are
applied to that VEM. The entire VEM remains unlicensed until sufficient
licenses become available to cover all of its CPU sockets.
Any extra licenses
are placed into a pool of available licenses on the VSM to be used as needed.
To license VEM
hosts, you must purchase a license package, you then install the package on
your VSM. The license package name is NEXUS1000V_LAN_SERVICES_PKG.
permanent licenses, you can remove the evaluation license file from the pool if
Evaluation licenses allow you to try the Cisco Nexus 1000V switch before you purchase permanent licenses.
The evaluation period starts when you install the evaluation license file. Unlike default licenses, an evaluation license is not invalidated when you install a permanent license. Instead, evaluation licenses expire only when the license file reaches its expiration date. The validity period might vary and the expiration date is mentioned in the license file.
Service Disruption—Even though vEthernet interfaces are not dropped on unlicensed VEMs, the following events might affect the vEthernet interfaces:
- Any new vEthernet interfaces are not brought up.
- vEthernet interfaces remain down with a “VEM Unlicensed” reason if there is a reattach due to a configuration change, module flap, or a port flap.
After installing permanent licenses, you can remove the evaluation license file from the pool if desired.
Evaluation license packs are available from Cisco.com.
Overdraft licenses are
used when the installed licenses are used up. Overdraft licenses can prevent a
service disruption if you exceed the number of permanent or evaluation licenses
specified in your license file.
The number of
overdraft licenses provided is based on the number of licenses that you
installed. If you installed 64 or more licenses, the number of overdraft
licenses provided is 30 percent of the installed licenses. If you installed
less than 64 licenses, the number of overdraft licenses is 16.
The expiration of an
overdraft license is tied to the expiration date of the installed license.
Monitoring Licensing Usage
A system message similar to the following is generated when more licenses are being used than are installed. This message indicates that you should add more permanent licenses:
%LICMGR-2-LOG_LIC_USAGE: Feature NEXUS1000V_LAN_SERVICES_PKG is using 17 licenses, only 16 licenses are installed. Please contact your Cisco account team or partner to purchase Licenses or downgrade to Essential Edition. To activate your purchased licenses, click on www.cisco.com/go/license.
A system message similar to the following is generated if there are not enough licenses available for a particular VEM:
%VEM_MGR_UNLICENSED: License for VEM 7 could not be obtained. Please contact your Cisco account team or partner to purchase Licenses or downgrade to Essential Edition. To activate your purchased licenses, click on www.cisco.com/go/license.
A system message similar to the following is generated every hour with a list of modules that are unlicensed:
%VEM_MGR_UNLICENSED_MODS: Modules are not licensed. This will result in network connectivity issues. Please contact your Cisco account team or partner to purchase Licenses or downgrade to Essential Edition. To activate your purchased licenses, click on www.cisco.com/go/license.
Pool of Available
If you have licenses
that are unused, the VSM stores these unused licenses in a pool of available
licenses. Before you can uninstall a license file, you must first return all
licenses from its VEMs to the pool.
Once a license has
been assigned to the VEM, you can configure how the system treats that license
if the VEM goes out of service for any reason.
The Cisco Nexus 1000V switch uses nonvolatile licensing is the default licensing method. With nonvolatile
licensing, once a license has been assigned to a VEM, it remains checked out to
that VEM even if the VEM is offline. If you want to decommission a VEM, you
must manually return its licenses to the pool using the
license transfer and
no vem commands or the licenses remain
unavailable to any other VEMs in the system. For more information about these
commands, see the
Cisco Nexus 1000V Command Reference for your platform.
Keeping the license
checked out allows the VEM to return to service immediately after it comes back
online. The VEM does not have to wait while acquiring new licenses.
licensing, when any VEM goes offline its licenses are immediately returned to
the VSM license pool. Once the VEM comes back online, it must acquire new
licenses from the license pool.
The following events
trigger a renegotiation and synchronization of licenses between the VSM and its
Clock change in
the VSM system clock
Installing a new
existing license file
Evaluation license expiration
During the license
renegotiation process, system messages alert you if licenses are returned to
the VSM pool for a VEM that is offline. This process requires no action on your
part because the licenses are returned to the VEM when it comes back online.
Disruption—Volatile licenses are removed from a VEM during a loss in
connectivity and must be reassigned when connectivity resumes. We recommend
that you use nonvolatile licensing and you transfer unused licenses as
Transferring Licenses to the License Pool.
This table includes the updates for those releases that have resulted in changes or addition to the feature.
Multi Hypervisor Licensing
|This feature was introduced.