Cisco WS-C2960-24PC-L Software Guide - Page 83
Setting the EtherChannel Spanning Tree Port VLAN Cost, Removing an EtherChannel Bundle
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Chapter 6 Configuring Fast EtherChannel and Gigabit EtherChannel Configuring EtherChannel Using PAgP Console> (enable) set channel cost 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 Spanning Tree Port VLAN Cost The spanning tree port VLAN cost provides an alternate cost for some of the VLANs in a trunk channel. Setting the spanning tree port VLAN cost provides load balancing of VLAN traffic across multiple channels configured with trunking because some VLANs in the channel can have port VLAN cost, while the remaining VLANS in the channel have port cost. To set the spanning tree port VLAN cost for an EtherChannel, perform this task in privileged mode: Step 1 Step 2 Task Command Determine the EtherChannel ID of the EtherChannel for show channel group admin_group which you want to set the port VLAN cost. Set the spanning tree port VLAN cost for an EtherChannel set channel vlancost {channel_id | all} using the EtherChannel ID obtained in Step 1. cost This example shows how to set the EtherChannel VLAN 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 channel vlancost 768 12 Channel 768 vlancost set to 12. Console> (enable) Removing an EtherChannel Bundle To return a Fast EtherChannel or Gigabit EtherChannel bundle to its default configuration, perform this task in privileged mode: Step 1 Step 2 Task Command Return a channel to its default configuration (you set port channel port_list mode auto must perform this task on both sides of the channel). Verify the configuration. show port channel [mod_num[/port_num]] 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 6-9
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