Cisco Nexus 1000V - Recovering a Secondary VSM with Active Primary

High Availability
Port channels provide high availability by load balancing traffic across multiple ports. If a physical port fails,
the port channel is still operational if there is an active member in the port channel.
Port channels support stateful and stateless restarts. A stateful restart occurs on a supervisor switchover. After
the switchover, the Cisco Nexus 1000V applies the runtime configuration after the switchover.
Prerequisites for Port Channels
Port channeling has the following prerequisites:
•
You are logged into the Cisco Nexus 1000V in EXEC mode.
•
All ports for a single port channel must meet the compatibility requirements. See Compatibility Checks,
on page 46 for more information about the compatibility requirements.
•
You can use virtual vPC-HM to configure a port channel even when the physical ports are connected
to two different switches.
Guidelines and Limitations
Port channeling has the following guidelines and restrictions:
•
All ports in the port channel must be in the same Cisco Nexus 1000V module; you cannot configure
port channels across Cisco Nexus 1000V modules.
•
Port channels can be formed with multiple upstream links only when they satisfy the compatibility
requirements and under the following conditions:
◦
The uplinks from the host are going to the same upstream switch.
◦
The uplinks from the host going to multiple upstream switches are configured with vPC-HM.
•
You can configure multiple port channels on a device.
•
After you configure a port channel, the configuration that you apply to the port channel interface affects
the port channel member ports. The configuration that you apply to the member ports affects only the
member port where you apply the configuration.
•
You must remove the port security information from a port before you can add that port to a port channel.
You cannot apply the port security configuration to a port that is a member of a channel group.
•
You can configure ports that belong to a port channel group as PVLAN ports.
•
Any configuration changes that you apply to the port channel is applied to every member interface of
that port channel.
•
Channel member ports cannot be source or destination SPAN ports.
•
To support LACP when inband/AIPC are also carried over the link, you must configure the following
commands on the ports connected to the ESX host:
Cisco Nexus 1000V for VMware vSphere Interface Configuration Guide, Release 5.x
57
Configuring Port Channels
High Availability