CHAPTER
29-1
Catalyst 3560 Switch Software Configuration Guide
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29
Configuring EtherChannels
This chapter describes how to configure EtherChannels on Layer 2 and Layer 3 ports on the
Catalyst 3560 switch. EtherChannel provides fault-tolerant high-speed links between switches, routers,
and servers. You can use it to increase the bandwidth between the wiring closets and the data center, and
you can deploy it anywhere in the network where bottlenecks are likely to occur. 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.
Note For complete syntax and usage information for the commands used in this chapter, refer to the command
reference for this release.
This chapter consists of these sections:
• Understanding EtherChannels, page 29-1
• Configuring EtherChannels, page 29-8
• Displaying EtherChannel, PAgP, and LACP Status, page 29-20
Understanding EtherChannels
These sections describe how EtherChannels work:
• EtherChannel Overview, page 29-2
• Port-Channel Interfaces, page 29-3
• Port Aggregation Protocol, page 29-4
• Link Aggregation Control Protocol, page 29-5
• Load Balancing and Forwarding Methods, page 29-6
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