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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 6 Configuring EtherChannel
Configuring an EtherChannel Using PAgP
Setting the EtherChannel Port Path Cost
Note
You accomplish this task using a global command that configures both LACP and PAgP.
The channel path cost is achieved by adjusting the port costs of each port belonging to the channel. If
you do not specify the cost, it is updated based on the current port costs of the channeling ports. You may
address one channel or all channels.
To set the EtherChannel port path cost, perform this task in privileged mode:
Note
When you enter the
set spantree channelcost
command, it does not appear in the configuration file. The
command causes a “set spantree portcost” entry to be created for each port in the channel. See the
“Configuring the PVST+ Port Cost”
section in
Chapter 7, “Configuring Spanning Tree,”
for information
on using the
set spantree portcost
command.
This example shows how to set the EtherChannel port path cost for channel ID 768:
Console> (enable)
show channel group 20
Admin Port Status Channel Channel
group Mode id
----- ----- ---------- --------- --------
20
1/1 notconnect on 768
20
1/2 connected on 768
Admin Port Device-ID Port-ID Platform
group
----- ----- ------------------------------- ------------------------- ----------
20
1/1
20
1/2 066510644(cat26-lnf(NET25)) 2/1 WS-C6009
Console> (enable)
Console> (enable)
set spantree channelcost 768 12
Port(s) 1/1,1/2 port path cost are updated to 31.
Channel 768 cost is set to 12.
Warning:channel cost may not be applicable if channel is broken.
Console> (enable)
Setting the EtherChannel VLAN Cost
Note
You accomplish this task by using a global command that configures both LACP and PAgP.
Task
Command
Step 1
Use the administrative group number to display
the EtherChannel ID.
show channel group
admin_group
or
show lacp-channel group
admin_key
Step 2
Use the EtherChannel ID to set the EtherChannel
port path cost.
set spantree channelcost
{
channel_id
|
all
}
cost
