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Figure 9-5. LAGs in the PowerConnect Departmental Switch
Aggregating Ports
Link Aggregation optimizes port usage by linking a group of ports together to form a single LAG
(aggregated group). Aggregating ports multiplies the bandwidth between the devices, increases
port flexibility, and provides link redundancy.
Consider the following when aggregating ports:
•
Link Aggregation is allowed between two devices only.
•
All ports within a LAG must be the same media type.
•
A VLAN is not configured on the port.
•
The port is not assigned to a different LAG.
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An available MAC address exists which can be assigned to a port.
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Auto-negotiation mode is not configured on the port.
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The port is in full-duplex mode.
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All ports in the LAG have the same ingress filtering and tagged modes.
•
All ports in the LAG have the same back pressure and flow control modes.
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All ports in the LAG have the same priority.
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All ports in the LAG have the same transceiver type.
•
The device supports up to six LAGs, and up to four ports in each LAG.
Ports added to a LAG do not their individual port configuration. When ports are removed from the
LAG, the original port configuration is applied to the ports. The device considers an Aggregated
Link a single logical port.
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