7
AGGREGATING PORTS
This section contains information for configuring Link Aggregation,
which optimizes port usage by linking a group of ports together to form a
single Link Aggregation Group (LAG). An LAG aggregates ports into a
single virtual port
. Aggregating ports multiplies the bandwidth between
the devices, increases port flexibility, and provides link redundancy. Note
the following:
■ The device supports up to four LAGs, and eight ports in each LAG.
■ The ports at both ends of a connection must be configured as trunk
ports.
■ Fast Ethernet ports and Gigabit Ethernet ports cannot be combined as
members in a single trunk.
■ All ports in a trunk assume the configuration settings of the first
member port (that is, the first port assigned or the lowest numbered
port if more than one port is assigned to a trunk in the same
command), including communication mode (i.e., speed, duplex mode
and flow control), VLAN assignments, and CoS settings.
■ STP, VLAN, and IGMP settings can only be made for the entire trunk
via the specified LAG.
■ Ports added to a LAG lose their individual port configuration. When
ports are removed from the LAG, the LAG’s configuration settings are
applied to the ports.
This section contains the following topics:
■ Viewing Link Aggregation
■ Configuring Link Aggregation
■ Modifying Link Aggregation
■ Removing Link Aggregation
■ Viewing LACP
■ Modifying LACP
