CHAPTER
31-1
Catalyst 2960 Switch Software Configuration Guide
OL-8603-04
31
Configuring EtherChannels and Link-State
Tracking
This chapter describes how to configure EtherChannels on Layer 2 ports on the Catalyst 2960 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. This chapter also describes how to configure link-state tracking.
Note For complete syntax and usage information for the commands used in this chapter, see the command
reference for this release.
This chapter consists of these sections:
• Understanding EtherChannels, page 31-1
• Configuring EtherChannels, page 31-8
• Displaying EtherChannel, PAgP, and LACP Status, page 31-16
• Understanding Link-State Tracking, page 31-17
• Configuring Link-State Tracking, page 31-19
Understanding EtherChannels
These sections describe how EtherChannels work:
• EtherChannel Overview, page 31-2
• Port-Channel Interfaces, page 31-3
• Port Aggregation Protocol, page 31-4
• Link Aggregation Control Protocol, page 31-5
• EtherChannel On Mode, page 31-6
• Load Balancing and Forwarding Methods, page 31-6
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