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Chapter 6
Configuring Fast EtherChannel and Gigabit EtherChannel
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Configuring EtherChannel
These sections describe how to configure an EtherChannel bundle:
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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:
Task
Step 1
If you are unsure which ports you can configure as
an EtherChannel, verify the EtherChannel
capabilities for the module or switch you are
configuring.
Step 2
Create an EtherChannel with the desired ports.
Step 3
Verify the EtherChannel configuration.
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
----- ---------- -------------------- ----- -----
3/5
3/6
----- ---------- -------------------- ----- -----
78-12647-02
If you disable a port in a channel, the system considers the port as a link failure and the port's traffic
is transferred to one or more of the remaining ports in the channel.
Ensure that all ports in a channel have the same configuration on both ends of the channel.
Creating an EtherChannel, page 6-5
Defining an EtherChannel Administrative Group, page 6-6
Setting the EtherChannel Spanning Tree Port Cost, page 6-7
Setting the EtherChannel Spanning Tree Port VLAN Cost, page 6-7
Removing an EtherChannel Bundle, page 6-8
Displaying EtherChannel Configuration Information, page 6-9
Displaying EtherChannel Traffic Statistics, page 6-10
Displaying EtherChannel PAgP Statistics, page 6-11
Status
Channel
Mode
connected
on
connected
on
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
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]
Admin Ch
Group Id
57
835
57
835
Configuring EtherChannel
6-5
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