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Configuring LACP Parameters
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Configuring LACP Parameters
Dynamically Creating a Port Channel –
Ports assigned to a common port channel must meet the following criteria:
• Ports must have the same LACP System Priority.
• Ports must have the same LACP port Admin Key.
• However, if the “port channel” Admin Key is set (page 4-142), then the port Admin
Key must be set to the same value for a port to be allowed to join a channel group.
Note – If the port channel admin key (lacp admin key, page 46-7) is not set (through the
CLI) when a channel group is formed (i.e., it has a null value of 0), this key is set to the
same value as the port admin key used by the interfaces that joined the group (lacp
admin key, as described in this section and on page 46-6).
Command Attributes
Set Port Actor – This menu sets the local side of an aggregate link; i.e., the ports on
this switch.
•
Port – Port number. (Range: 1-24/48)
• System Priority – LACP system 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: 32768)
- Ports must be configured with the same system priority to join the same LAG.
- System priority is combined with the switch’s MAC address to form the LAG
identifier. This identifier is used to indicate a specific LAG during LACP
negotiations with other systems.
• Admin Key – The LACP administration key must be set to the same value for ports
that belong to the same LAG. (Range: 0-65535; Default: 1)
• Port Priority – If a link goes down, LACP port priority is used to select a backup
link. (Range: 0-65535; Default: 32768)
Set Port Partner – This menu sets the remote side of an aggregate link; i.e., the
ports on the attached device. The command attributes have the same meaning as
those used for the port actor. However, 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.