HP Cisco Nexus 5000 Cisco MDS 9000 Family CLI Configuration Guide - Release 4. - Page 469

Chapter 17 Configuring PortChannels PortChannel Protocols Send documentation comments to [email protected] To force the addition of a port to a PortChannel, follow these steps: Step 1 Step 2 Step 3 Command switch# config t switch(config)# switch(config)# interface fc1/1 switch(config-if)# switch(config-if)# channel-group 1 force Purpose Enters configuration mode. Specifies the interface fc1/1. Forces the addition of the physical port for interface fc1/1 to channel group 1. The port is shut down. 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. • 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. 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 17-7 and "Graceful Shutdown" section on page 13-12). Deleting an Interface from a PortChannel To delete a physical interface (or a range of physical interfaces) from a PortChannel, follow these steps: Step 1 Step 2 Command switch(config)# interface fc1/1 switch(config-if)# switch(config)# interface fc1/1 - 5 switch(config-if)# switch(config-if)# no channel-group 2 switch(config-if)# Purpose Enters the selected physical interface level. Enters the selected range of physical interfaces. Deletes the physical Fibre Channel interfaces in channel group 2. 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. OL-18084-01, Cisco MDS NX-OS Release 4.x Cisco MDS 9000 Family CLI Configuration Guide 17-15