Cisco Catalyst 4500 Series Configuration Manual page 615

Configuring EtherChannel and Link State
Tracking
This chapter describes how to use the command-line interface (CLI) to configure EtherChannel on the
Catalyst 4500 series switch Layer 2 or Layer 3 interfaces. It also provides guidelines, procedures, and
configuration examples.
EtherChannel provides automatic recovery for the loss of a link by redistributing the load across the
remaining links. If a link fails, EtherChannel redirects traffic from the failed link to the remaining links
in the channel without intervention. This chapter also describes how to configure link-state tracking.
This chapter includes the following major sections:
• About EtherChannel, page 24-2
• EtherChannel Configuration Guidelines and Restrictions, page 24-5
• Configuring EtherChannel, page 24-6
• Displaying EtherChannel to a Virtual Switch System, page 24-16
• Understanding Link-State Tracking, page 24-18
• Configuring Link-State Tracking, page 24-21
The commands in the following sections can be used on all Ethernet interfaces on a Catalyst 4500 series
Note
switch, including the uplink ports on the supervisor engine.
Note For complete syntax and usage information for the switch commands used in this chapter, first look at
the Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:
http://www.cisco.com/en/US/products//hw/switches/ps4324/index.html
If the command is not found in the Catalyst 4500 Series Switch Command Reference, it will be found in
the larger Cisco IOS library. Refer to the Cisco IOS Command Reference and related publications at this
location:
http://www.cisco.com/en/US/products/ps6350/index.html
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C H A P T E R
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
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