Vem Management Of Lacp; Port Channel Modes - Cisco Nexus 1000V Configuration Manual

VEM Management of LACP

• When you delete the port channel, the associated channel group is automatically deleted. All member
Note
• LACP port channels on Cisco virtual interface cards do not support more than two vNICs.
Figure 4: Individual Links Combined into a Port Channel
VEM Management of LACP
You can offload operation of the LACP from the Virtual Supervisor Module (VSM) to the Virtual Ethernet
Ports (VEMs) to prevent a situation where the VSM cannot negotiate LACP with the upstream switch when
the VEM is disconnected from the VSM (referred to as headless mode). VEM management of LACP allows
it to reestablish port channels after the reboot of a headless VEM.

Port Channel Modes

Individual interfaces in port channels are configured with channel modes. When you run static port channels
with no aggregation protocol, the channel mode is always set to on.
You enable LACP for each channel by setting the channel mode for each interface to active or passive. You
can configure either channel mode for individual links in the LACP channel group when you are adding the
links to the channel group.
The following table describes the channel modes.
Cisco Nexus 1000V for VMware vSphere Interface Configuration Guide, Release 5.x
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interfaces revert to their original configuration.
Configuring Port Channels