Port Management
Configuring Link Aggregation
Cisco 500 Series Stackable Managed Switch Administration Guide
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The following are additional rules used to select the active or standby ports in a
dynamic LACP:
•
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
NOTE
The LACP setting is irrelevant on ports that are not members of a dynamic LAG.
To define the LACP settings:
STEP 1
Click
Port Management
>
Link Aggregation
>
LACP
. The
LACP
page opens.
STEP 2
Enter the LACP System Priority. See
Configuring LACP
.
STEP 3
Select a port, and click
Edit.
The
Edit LACP
page opens.
STEP 4
Enter the values for the following fields:
•
Interface
—Select the port number to which timeout and priority values are
assigned.
•
LACP Port Priority
—Enter the LACP priority value for the port. See
Setting
Port LACP Parameter Settings
.
•
LACP Timeout
—Select the periodic transmissions of LACP PDUs, which
occur at either a long or short transmission speed, depending upon the
expressed LACP timeout preference.
STEP 5
Click
Apply
. The Running Configuration file is updated.
