Chapter 4. Web Configuration & Operation
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CHAPTER 4
WEB OPERATION & CONFIGURATION
4.3.5.2 LACP
The Switch supports dynamic Link Aggregation Control Protocol (LACP) which is specified in IEEE 802.3ad. Static
trunks have to be manually configured at both ends of the link. In other words, LACP configured ports can
automatically negotiate a trunked link with LACP configured ports on another devices. You can configure any number
of ports on the Switch as LACP, as long as they are not already configured as part of a static trunk. If ports on other
devices are also configured as LACP, the Switch and the other devices will negotiate a trunk link between them.
Port:
The port number.
LACP Enabled:
Enable LACP on a switch port.
Key:
The “Auto” setting sets the key as appropriate by the physical link speed. Select “Specific” if you want a user-
defined key value. The allowed key value range is 1~65535. Ports in an aggregated link group must have the same
LACP port Key. In order to allow a port to join an aggregated group, the port Key must be set to the same value.
Role:
The user can select either “Active” or “Passive” role depending on the device’s capability of negotiating and
sending LACP control packets.
Ports that are designated as “Active” are able to process and send LACP control frames. Hence, this allows LACP
compliant devices to negotiate the aggregated like so that the group may be changed dynamically as required. In
order to add or remove ports from the group, at least one of the participating devices must set to “Active” LACP ports.
On the other hand, LACP ports that are set to “Passive” cannot send LACP control frames. In order to allow LACP-
enabled devices to form a LACP group, one end of the connection must designate as “Passive” LACP ports.
Timeout:
The Timeout controls the period between BPDU transmissions. Fast will transmit LACP packets each second,
while Slow will wait for 30 seconds before sending a LACP packet.
Prio:
The priority of the port. The lower number means greater priority. This priority value controls which ports will be
active and which ones will be in a backup role.
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