Cisco Catalyst 4500 Series - Configuring Etherchannel and Link State Tracking

CHAPTER
27-1
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
27
Configuring EtherChannel and Link State
Tracking
This chapter describes how to use the command-line interface (CLI) to configure EtherChannel on the
Layer 2 or Layer 3 interfaces of the switch. 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 27-1
• EtherChannel Configuration Guidelines and Restrictions, page 27-6
• Configuring EtherChannel, page 27-7
• Displaying EtherChannel to a Virtual Switch System, page 27-20
• Understanding Link-State Tracking, page 27-23
• Configuring Link-State Tracking, page 27-26
Note The commands in the following sections can be used on all Ethernet interfaces of the switch, including
the uplink ports on the supervisor engine.
Note For complete syntax and usage information for the switch commands used in this chapter, see the
Cisco IOS Command Reference Guides for the Catalyst 4500 Series Switch.
If a command is not in the Cisco Catalyst 4500 Series Switch Command Reference , you can locate it in
the Cisco IOS Master Command List, All Releases.
About EtherChannel
EtherChannel bundles up to eight individual Ethernet links into a single logical ink that provides an
aggregate bandwidth of up to 800 Mbps (Fast EtherChannel), 8 Gbps (Gigabit EtherChannel), or 80
Gbps (10 Gigabit EtherChannel) between a Catalyst 4500 or 4500X Series Switch and another switch or
host.