HP Cisco Nexus 5000 Cisco Nexus 5000 Series Switch CLI Software Configuration - Page 572

Autocreation Guidelines Configuring SAN Port Channels Table 71: Channel Group Configuration Differences User-Configured Channel Group Manually configured by the user. Autocreated Channel Group Created automatically when compatible links come up between two compatible switches, if channel group autocreation is enabled in all ports at both ends. Member ports cannot participate in autocreation of None of these ports are members of a user-configured channel groups. The autocreation feature cannot be channel group. configured. You can form the SAN port channel with a subset of All ports included in the channel group participate in the ports in the channel group. Incompatible ports the SAN port channel. No member port becomes remain in a suspended or isolated state depending on isolated or suspended; instead, the member port is the On or Active mode configuration. removed from the channel group when the link is found to be incompatible. Any administrative configuration made to the SAN Any administrative configuration made to the SAN port channel is applied to all ports in the channel port channel is applied to all ports in the channel group, and you can save the configuration for the port group, but the configurations are saved for the channel interface. member ports; no configuration is saved for the port channel interface. You can explicitly convert this channel group, if required. You can remove any channel group and add members You cannot remove a channel group. You cannot add to a channel group. members to the channel group or remove members. The channel group is removed when no member ports exist. Autocreation Guidelines When using the autocreation protocol, follow these guidelines: • A port is not allowed to be configured as part of a SAN port channel when the autocreation feature is enabled. These two configurations are mutually exclusive. • Autocreation must be enabled in both the local and peer ports to negotiate a SAN port channel. • Aggregation occurs in one of two ways: ◦ A port is aggregated into a compatible autocreated SAN port channel. ◦ A port is aggregated with another compatible port to form a new SAN port channel. • Newly created SAN port channels are allocated from the maximum possible port channel number in a decreasing order based on availability. If all port channel numbers are used up, aggregation is not allowed. • You cannot change the membership or delete an autocreated SAN port channel. • When you disable autocreation, all member ports are removed from the autocreated SAN port channel. • Once the last member is removed from an autocreated SAN port channel, the channel is automatically deleted and the number is released for reuse. Cisco Nexus 5000 Series Switch CLI Software Configuration Guide 526 OL-16597-01