HP Cisco MDS 9140 Cisco Nexus 5000 Series Command Reference Release 4.0(1a)N2( - Page 156

channel-group (Ethernet) Chapter 2 Ethernet Commands Send comments to [email protected] Usage Guidelines Use this command to create a channel group that includes the interface that you are working on and to add or remove specific interfaces from the channel group. Use this command to move a port from one channel group to another. You enter the channel group that you want the port to move to; the switch automatically removes the specified port from its present channel group and adds it to the specified channel group. After you enable LACP globally, by using the feature lacp command, you enable LACP on each channel by configuring the channel mode as either active or passive. A EtherChannel in the on channel mode is a pure EtherChannel and can aggregate a maximum of eight ports. The EtherChannel does not run LACP. You cannot change the mode for an existing EtherChannel or any of its interfaces if that EtherChannel is not running LACP; the channel mode remains as on. The system returns an error message if you attempt to change the mode. Use the no form of this command to remove the physical interface from the EtherChannel. When you delete the last physical interface from a EtherChannel, the EtherChannel remains. To delete the EtherChannel completely, use the no form of the interface port-channel command. The compatibility check includes the following operational attributes: • Port mode • Access VLAN • Trunk native VLAN • Tagged or untagged • Allowed VLAN list • SPAN (cannot be SPAN source or destination port) • Storm control Use the show port-channel compatibility-parameters command to see the full list of compatibility checks that Cisco NX-OS uses. You can only add interfaces configured with the channel mode set to on for static EtherChannels, that is, without a configured aggregation protocol. You can only add interfaces configured with the channel mode as active or passive to EtherChannels that are running LACP. You can configure these attributes on an individual member port. If you configure a member port with an incompatible attribute, Cisco NX-OS suspends that port in the EtherChannel. When the interface joins a EtherChannel, some of its individual parameters are overridden with the values on the EtherChannel, as follows: • MAC address • Spanning Tree Protocol (STP) • Service policy • Quality of service (QoS) • Access control lists (ACLs) Interface parameters, such as the following, remain unaffected when the interface joins or leaves a EtherChannel: • Description • Cisco Discovery Protocol (CDP) • LACP port priority • Debounce Cisco Nexus 5000 Series Command Reference 2-8 OL-16599-01