Setting Port Lacp Parameter Settings - Cisco 200 Series Administration Manual

Port Management
Configuring Link Aggregation
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Cisco Small Business 200 Series Smart Switch Administration Guide
The LACP priority is taken either from the local or the remote device according to
the following rule: The local LACP System Priority is compared to the remote
LACP System Priority device. The lowest priority is used. If both priorities are the
same, the local and remote MAC addresses are compared. The priority of the
device with the lowest MAC address is used.
The additional rules in selecting the active or standby ports in a dynamic LACP are
as follows:
• Any link operating at a different speed from the highest-speed active
member or operating at half-duplex is made standby. All the active ports in
a dynamic LAG operate at the same baud rate.
• If the port LACP priority of the link is lower than that of the currently-active
link members, and the number of active members is already at the maximum
number, the link is made inactive, and placed in standby mode.

Setting Port LACP Parameter Settings

The LACP Page displays and enables configuration of the LACP System Priority,
LACP timeout, and LACP port priority. LACP timeout is a per port parameter, and is
the time interval between the sending and receiving of consecutive LACP PDUs.
With all factors equal, when the LAG is configured with more candidate ports than
the maximum number of active ports allowed, the switch selects ports as active
from the dynamic LAG that has the highest priority
The LACP setting is irrelevant on ports that are not members of a dynamic LAG.
To define the LACP settings:
Click Port Management > Link Aggregation > LACP. The
Enter the global LACP System Priority value that determines which candidate
ports will become members of the LAG.
The page displays the LACP settings of every port. You can select and edit the
desired port by using the Edit LACP Page
Select a port, and click Edit. The
Enter the values for the following fields:
• Port—Select the port number to which timeout and priority values are
assigned.
• LACP Port Priority—Enter the LACP priority value for the port.
Edit LACP Page
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LACP Page
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