About Interface Deletion From A Portchannel; Deleting An Interface From A Portchannel; Portchannel Protocols - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

PortChannel Protocols

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About Interface Deletion from a PortChannel

When a physical interface is deleted from the PortChannel, the channel membership is automatically
updated. If the deleted interface is the last operational interface, then the PortChannel status is changed
to a down state. Deleting an interface from a PortChannel decreases the channel size and bandwidth of
the PortChannel.
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After the members are deleted, regardless of the mode (ACTIVE and ON) used, the ports at either end
are gracefully brought down, indicating that no frames are lost when the interface is going down (see the
"Generation 1 PortChannel Restrictions" section on page 23-7
page

Deleting an Interface from a PortChannel

To delete a physical interface (or a range of physical interfaces) from a PortChannel using Fabric
Manager, follow these steps:
Expand ISLs and then select Port Channels in the Physical Attributes pane.
Step 1
You see the PortChannels configured in the Information pane.
Click the Channels tab and find the switch and PortChannel that you want to edit.
Step 2
Remove the interface or list of interfaces you want deleted in the Members the Admin column.
Step 3
Click the Apply Changes icon to save any modifications.
Step 4
PortChannel Protocols
In earlier Cisco SAN-OS releases, PortChannels required additional administrative tasks to support
synchronization. The Cisco NX-OS software provides robust error detection and synchronization
capabilities. You can manually configure channel groups or they can be automatically created. In both
cases, the channel groups have the same capability and configurational parameters. Any change in
configuration applied to the associated PortChannel interface is propagated to all members of the
channel group.
A protocol to exchange PortChannel configurations is available in all Cisco MDS switches. This addition
simplifies PortChannel management with incompatible ISLs. An additional autocreation mode enables
ISLs with compatible parameters to automatically form channel groups without manual intervention.
The PortChannel protocol is enabled by default.
The PortChannel protocol expands the PortChannel functional model in Cisco MDS switches. It uses the
exchange peer parameters (EPP) services to communicate across peer ports in an ISL. Each switch uses
the information received from the peer ports along with its local configuration and operational values to
decide if it should be part of a PortChannel. The protocol ensures that a set of ports are eligible to be
part of the same PortChannel. They are only eligible to be part of the same port channel if all the ports
have a compatible partner.
Cisco MDS 9000 Family Fabric Manager Configuration Guide
23-20
If you use the default ON mode to avoid inconsistent states across switches and to maintain
consistency across switches, then the ports shut down. You must explicitly enable those ports again.
If you use the ACTIVE mode, then the PortChannel ports automatically recover from the deletion.
20-11).
Chapter 23 Configuring PortChannels
and "Graceful Shutdown" section on
OL-17256-03, Cisco MDS NX-OS Release 4.x