Cisco WS-C4003 Software Guide - Page 85

Chapter 6 Configuring Fast EtherChannel and Gigabit EtherChannel Configuring EtherChannel Setting the EtherChannel Spanning Tree Port Cost To set the spanning tree port cost for an EtherChannel, perform this task in privileged mode: Step 1 Step 2 Task Determine the EtherChannel ID of the EtherChannel for which you want to set the port cost. Set the spanning tree port cost for an EtherChannel using the EtherChannel ID obtained in Step 1. Command show channel group admin_group set channel cost {channel_id | all} cost 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 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. This provides load balancing of VLAN traffic accross multiple channels configured with trunking, as some VLANs in the channel can have port VLAN cost, and 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 Determine the EtherChannel ID of the EtherChannel for which you want to set the port VLAN cost. Set the spanning tree port VLAN cost for an EtherChannel using the EtherChannel ID obtained in Step 1. Command show channel group admin_group set channel vlancost {channel_id | all} cost 78-12647-02 Software Configuration Guide-Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4 6-7