46 CHAPTER 2: PORT CONFIGURATION
A load sharing aggregation group may contain several selected ports, but a
non-load sharing aggregation group can only have one selected port, while others
as standby ports. Selection criteria of selected ports vary for different types of
aggregation groups.
Configuring Link
Aggregation
The Switch 7750 only supports LACP for ports on the same I/O module. A
maximum number of 16 ports can be active in a link aggregation. For modules
that have fewer than 16 ports, such as the 8-port 1000BASE-X-GE module, only
eight ports can be active members of a link aggregation.
Link aggregation configuration includes tasks described in the following sections:
■Enabling or Disabling LACP at a Port
■Creating or Deleting an Aggregation Group
■Adding or Deleting Ethernet Ports to or from an Aggregation Group
■Setting or Deleting an Aggregation Group Descriptor
■Configuring System Priority
■Configuring Port Priority
■Displaying and Debugging Link Aggregation
Enabling or Disabling LACP at a Port
You should first enable LACP at the ports before performing dynamic aggregation,
so that both parties can agree on adding/deleting the ports into/from a dynamic
LACP aggregation group.
Perform the following configuration in Ethernet port view.
LACP is disabled at the port by default.
Note that:
■You cannot enable LACP at a
■Mirrored port
■Port with a static MAC address configured
■Port with static ARP configured
■Port with 802.1x enabled.
■You cannot enable LACP on a port in a manual aggregation group.
■You can add a port with LACP enabled to a manual aggregation group, but the
LACP will be disabled on it automatically. However, you can add a port with
LACP disabled into a static LACP aggregation group, and the LACP will be
enabled automatically.
Tabl e 39 Enabling/Disabling LACP at a Port
Operation Command
Enable LACP at the port lacp enable
Disable LACP at the port undo lacp enable