Chapter 7 Configuring the Switch Ports
Creating EtherChannel Port Groups
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Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
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Creating EtherChannel Port Groups
Fast EtherChannel (FEC) and Gigabit EtherChannel port groups act as single,
logical ports for high-bandwidth connections between switches or between
switches and servers.
Note You can create port groups of either Gigabit Ethernet ports or 100BASE-TX
ports, but you cannot create a port group that has both port speeds.
For the restrictions that apply to port groups, see the “Avoiding Configuration
Conflicts” section on page 9-2.
Understanding EtherChannel Port Grouping
This software release supports two different types of port groups: source-based
forwarding port groups and destination-based forwarding port groups.
Source-based forwarding port groups distribute packets forwarded to the group
based on the source address of incoming packets. You can configure up to eight
ports in a source-based forwarding port group. Source-based forwarding is
enabled by default.
Destination-based port groups distribute packets forwarded to the group based on
the destination address of incoming packets. You can configure an unlimited
number of ports in a destination-based port group.
You can create up to 12 port groups. All ports in each group must be of the same
type; for example, they must be all source-based or all destination-based. You can
have source-based port groups and destination-based source groups. You can
independently configure port groups that link switches, but you must consistently
configure both ends of a port group.
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