Edge-Core ECS4120-28F, Reference Manual, Page: 432 / 938

Chapter 12
| Link Aggregation Commands
Dynamic Configuration Commands
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Command Mode
Interface Configuration (Ethernet)
Command Usage
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Setting a lower value indicates a higher effective priority.
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If an active port link goes down, the backup port with the highest priority is
selected to replace the downed link. However, if two or more ports have the
same LACP port priority, the port with the lowest physical port number will be
selected as the backup port.
◆
If an LAG already exists with the maximum number of allowed port members,
and LACP is subsequently enabled on another port using a higher priority than
an existing member, the newly configured port will replace an existing port
member that has a lower priority.
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Once the remote side of a link has been established, LACP operational settings
are already in use on that side. Configuring LACP settings for the partner only
applies to its administrative state, not its operational state, and will only take
effect the next time an aggregate link is established with the partner.
Example
Console(config)#interface ethernet 1/5
Console(config-if)#lacp actor port-priority 128
lacp system-priority
This command configures a port's LACP system priority. Use the no form to restore
the default setting.
Syntax
lacp { actor | partner } system-priority priority
no lacp { actor | partner } system-priority
actor - The local side an aggregate link.
partner - The remote side of an aggregate link.
priority - This priority is used to determine link aggregation group (LAG)
membership, and to identify this device to other switches during LAG
negotiations. (Range: 0-65535)
Default Setting
32768
Command Mode
Interface Configuration (Ethernet)
Command Usage
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Port must be configured with the same system priority to join the same LAG.