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| Sun Ethernet Fabric Operating System ### LA Administration Guide

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## Configure Port-Channel Interfaces

1. Enable port channeling, and create the port channel (1 in this example).

       SEFOS# configure terminal
       SEFOS(config)# set port-channel enable
       SEFOS(config)# interface port-channel 1
       SEFOS(config-if)# no shutdown

2. Configure the port.

       SEFOS(config)# interface extreme-ethernet 0/3
       SEFOS(config-if)# no shutdown

3. Configure the physical port in the port channel, and specify the mode by which the port becomes part of the port channel.

       SEFOS(config-if)# channel-group channel_group_number mode mode_value
       SEFOS(config-if)# end

   where:

   - `channel_group_number` can be 1 to 64. Each port channel can have up to eight compatibly configured Ethernet interfaces.

   - `mode_value` can be:

     - `active` - LACP negotiation is started unconditionally.

     - `passive` - LACP negotiation is started only when an LACP packet is received from the peer.

     - `on` - Forces the interface to be a part of the port channel without communicating through the LACP protocol. This value is equivalent to manual aggregation.

4. Review the `etherchannel` information to ensure that the values for the channel group and the mode have changed in both switches.

   The following output has been truncated for readability. The output in both switches should be the same.

       SEFOS# show etherchannel 1 detail

       ...
       -------------
       Port State = Up in Bundle
       Channel Group : 1
       Mode : Active
       Port-channel = Po1
       ...

5. If the port channel interface is not present, you must create it by typing these commands.

       SEFOS# configure terminal
       SEFOS(config)# interface port-channel port_number
       SEFOS(config-if)# no shutdown
       SEFOS(config-if)# end

   Note - Verify the LACP feature by enabling LACP (Active or Passive) on both actor and partner sides. If LACP is enabled on the actor side and manual on the partner side (or vice versa), LACP results in inconsistent behavior. Thus, you must avoid this misconfiguration.

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