Autocreation - Cisco MDS 9000 Series Configuration Manual

Autocreation

User-Configured Channel Group
You can form the PortChannel with a subset of
the ports in the channel group. Incompatible ports
remain in a suspended or isolated state depending
on the ON or ACTIVE mode configuration.
Any administrative configuration made to the
PortChannel is applied to all ports in the channel
group, and you can save the configuration for the
PortChannel interface.
You can remove any channel group and add
members to a channel group.
Note Autocreation is not supported as of MDS NX-OS Release 4.1(1b) and later.
Autocreation
The autocreation protocol has the following functionality:
• A port is not allowed to be configured as part of a PortChannel when the autocreation feature is enabled.
• Autocreation must be enabled in both the local and peer ports to negotiate a PortChannel.
• Aggregation occurs in one of two ways:
• Newly created PortChannels are allocated from the maximum possible PortChannel (128 for Generation
• You cannot change the membership or delete an autocreated PortChannel.
• When you disable autocreation, all member ports are removed from the autocreated PortChannel.
• Once the last member is removed from an autocreated PortChannel, the channel is automatically deleted
• An autocreated PortChannel is not persistent through a reboot. An autocreated PortChannel can be
• You can enable or disable the autocreation feature on a per-port basis or for all ports in the switch. When
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These two configurations are mutually exclusive.
• A port is aggregated into a compatible autocreated PortChannel.
• A port is aggregated with another compatible port to form a new PortChannel.
1 or a combination of Generation 1 and Generation 2 switches, or 256 for Generation 2 switches) in a
decreasing order based on availability. If all 128 (or 256) numbers are used up, aggregation is not allowed.
and the number is released for reuse.
manually configured to appear the same as a persistent PortChannel. Once the PortChannel is made
persistent, the autocreation feature is disabled in all member ports.
this configuration is enabled, the channel group mode is assumed to be active. The default for this task
is disabled.
Autocreated Channel Group
All ports included in the channel group participate in the
PortChannel—no member port becomes isolated or
suspended; instead, the member port is removed from the
channel group when the link is found to be incompatible.
Any administrative configuration made to the PortChannel
is applied to all ports in the channel group, but the
configurations are saved for the member ports; no
configuration is saved for the PortChannel interface. You
can explicitly convert this channel group, if required.
You cannot remove a channel group, or add/remove any
of its members. The channel group is removed when no
member ports exist.
Configuring PortChannels