Cisco 4506-E Software Guide - Page 81
Creating an EtherChannel, Defining an EtherChannel Administrative Group
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Chapter 6 Configuring Fast EtherChannel and Gigabit EtherChannel Configuring EtherChannel Using PAgP Creating an EtherChannel You create an EtherChannel port bundle by specifying the ports in the channel and the channeling mode. When you create an EtherChannel, an administrative group number is assigned automatically if one is not already assigned to the specified ports. In addition, a channel ID is assigned. The silent and non-silent keywords function only with the auto and desirable modes. To create an EtherChannel port bundle, perform this task in privileged mode: Step 1 Step 2 Step 3 Task If you are unsure which ports you can configure as an EtherChannel, verify the EtherChannel capabilities for the module or switch you are configuring. Create an EtherChannel with the desired ports. Verify the EtherChannel configuration. Command show port capabilities [mod_num[/port_num]] set port channel port_list [admin_group] mode {on | off | desirable | auto} [silent | non-silent] show port channel [port_list] This example shows how to create an EtherChannel bundle and verify the configuration: Console> (enable) set port channel 3/5-6 on Port(s) 3/5-6 are assigned to admin group 57. Port(s) 3/5-6 channel mode set to on. Console> (enable) show port channel Port Status Channel Admin Ch Mode Group Id 3/5 connected on 57 835 3/6 connected on 57 835 Port Device-ID Port-ID Platform 3/5 069003103(5500) 3/5 WS-C4000 3/6 069003103(5500) 3/6 WS-C4000 Console> (enable) Defining an EtherChannel Administrative Group You can define EtherChannel administrative groups manually to identify groups of ports that are allowed to form an EtherChannel bundle. When you create an EtherChannel port bundle, an administrative group is defined automatically. Administrative group membership is limited by hardware restrictions. The admin_group can be any value between 1 and 1024, inclusive. Caution Modifying the EtherChannel administrative group on connected ports causes the specified ports to be removed from and then added to spanning tree (that is, a spanning tree topology change occurs and the ports must enter listening and learning mode before returning to forwarding mode). 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-7
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