C
HAPTER
5
| Interface Configuration
Trunk Configuration
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transmit LACPDU interval to 1 second. When it receives an LACPDU set
with a long timeout from the actor, it adjusts the transmit LACPDU
interval to 30 seconds.
If the actor does not receive an LACPDU from its partner before the
configured timeout expires, the partner port information will be deleted
from the LACP group.
When a dynamic port-channel member leaves a port-channel, the
default timeout value will be restored on that port.
When a dynamic port-channel is torn down, the configured timeout
value will be retained. When the dynamic port-channel is constructed
again, that timeout value will be used.
Configure Aggregation Port - General
◆ Port – Port identifier. (Range: 1-28/52)
◆ LACP Status – Enables or disables LACP on a port.
Configure Aggregation Port - Actor/Partner
◆ Port – Port number. (Range: 1-28/52)
◆ 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 – Actor: 1, Partner: 0)
By default, the Actor Admin Key is determined by port's link speed, and
copied to Oper Key. The Partner Admin Key is assigned to zero, and the
Oper Key is set based upon LACP PDUs received from the Partner.
◆ 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)
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.
◆ Port Priority – If a link goes down, LACP port priority is used to select
a backup link. (Range: 0-65535; Default: 32768)
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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.
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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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