40-2
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 40 Configuring EtherChannels and Link-State Tracking
Understanding EtherChannels
• Load-Balancing and Forwarding Methods, page 40-8
• EtherChannel and Switch Stacks, page 40-10
EtherChannel Overview
An EtherChannel consists of individual Gigabit Ethernet links bundled into a single logical link as shown
in Figure 40-1.
Figure 40-1 Typical EtherChannel Configuration
The EtherChannel provides full-duplex bandwidth up to 8 Gb/s (Gigabit EtherChannel) or 80 Gb/s
(10-Gigabit EtherChannel) between your switch and another switch or host.
Each EtherChannel can consist of up to eight compatibly configured Ethernet ports. All ports in each
Ethe
rChannel must be configured as either Layer 2 or Layer 3 ports. The number of EtherChannels is
l
imited to 48. For more information, see the “EtherChannel Configuration Guidelines” section on
page 40-12. The EtherChannel Layer 3 ports are made up of routed ports. Routed ports are physical ports
configured to be in Layer 3 mode by using the no switchport inte
rface configuration command. For
more information, see the Chapter 13, “Configuring Interface Characteristics.”
Note Layer 3 EtherChannels are not supported on switches running the LAN base feature set.
101237
Catalyst 8500
series switch
Gigabit EtherChannel
Workstations
10/100
Switched
links
Workstations
10/100
Switched
links
1000BASE-X 1000BASE-X
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