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CHAPTER
27-1
Catalyst 2950 Desktop Switch Software Configuration Guide
78-14982-01
27
Configuring EtherChannels
This chapter describes how to configure EtherChannel on Layer 2 interfaces. 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 27-1
• Configuring EtherChannels, page 27-7
• Displaying EtherChannel and PAgP Status, page 27-11
Understanding EtherChannels
An EtherChannel consists of individual Fast Ethernet or Gigabit Ethernet links bundled into a single
logical link as shown in Figure 27-1. The EtherChannel provides full-duplex bandwidth up to 800 Mbps
(Fast EtherChannel) or 2 Gbps (Gigabit EtherChannel) between your switch and another switch or host.