Cisco 3750G - Catalyst Integrated Wireless LAN Controller, Руководство по настройке

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C H A P T E R
34-1
Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
34
Configuring EtherChannels and Link-State
Tracking
This chapter describes how to configure EtherChannels on Layer 2 and Layer 3 ports on the
Catalyst 3750 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. Unless otherwise noted,
the term
switch refers to a standalone switch and to a switch stack.
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 34-1
•
Configuring EtherChannels, page 34-11
•
Displaying EtherChannel, PAgP, and LACP Status, page 34-23
•
Understanding Link-State Tracking, page 34-23
•
Configuring Link-State Tracking, page 34-25
Understanding EtherChannels
These sections describe how EtherChannels work:
•
EtherChannel Overview, page 34-2
•
Port-Channel Interfaces, page 34-4
•
Port Aggregation Protocol, page 34-5
•
Link Aggregation Control Protocol, page 34-7
•
EtherChannel On Mode, page 34-8
•
Load Balancing and Forwarding Methods, page 34-8
•
EtherChannel and Switch Stacks, page 34-10