Cisco 2950 Software Configuration Guide - Page 613
Configuring EtherChannel Load Balancing
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Chapter 31 Configuring EtherChannels Configuring EtherChannels To remove an interface from the EtherChannel group, use the no channel-group interface configuration command. If you delete the EtherChannel by using the no interface port-channel global configuration command without removing the physical interfaces, the physical interfaces are shutdown. If you do not want the member physical interfaces to shut down, remove the physical interfaces before deleting the EtherChannel. This example shows how to assign interfaces 1 and 2 with the PAgP mode desirable: Switch# configure terminal Switch(config)# interface range fasttethernet0/1 -2 Switch(config-if)# channel-group 5 mode desirable Switch(config-if)# end Configuring EtherChannel Load Balancing This section describes how to configure EtherChannel load balancing by using source-based or destination-based forwarding methods. For more information, see the "Understanding Load Balancing and Forwarding Methods" section on page 31-6. Beginning in privileged EXEC mode, follow these steps to configure EtherChannel load balancing: Step 1 Step 2 Step 3 Step 4 Step 5 Command Purpose configure terminal Enter global configuration mode. port-channel load-balance {dst-mac | src-mac} Configure an EtherChannel load-balancing method. The default is src-mac. Select one of these keywords to determine the load-distribution method: • dst-mac-Load distribution is based on the destination-host MAC address of the incoming packet. Packets to the same destination are sent on the same port, but packets to different destinations are sent on different ports in the channel. • src-mac-Load distribution is based on the source-MAC address of the incoming packet. Packets from different hosts use different ports in the channel, but packets from the same host use the same port in the channel. If the link partner to the switch is a physical learner, set the load-distribution method to one of these ways: • If the channel-group interface configuration command is set to auto or desirable, the switch automatically uses the load distribution method based on the source-MAC address, regardless of the configured load-distribution method. • If the channel-group interface configuration command is set to on, set the load-distribution method based on the source-MAC address by using the port-channel load-balance src-mac global configuration command. end Return to privileged EXEC mode. show etherchannel load-balance Verify your entries. copy running-config startup-config (Optional) Save your entries in the configuration file. 78-11380-10 Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide 31-11
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