Manufacture Technology GEFXL2-CSW28KX User Manual page 124

The switch periodically transmits LLDP frames to its neighbours for having the network
discovery information up-to-date. The interval between each LLDP frame is determined by
the Tx Interval value. Valid values are restricted to 5 - 32768 seconds.
Tx Hold :

Each LLDP frame contains information about how long the information in the LLDP frame
shall be considered valid. The LLDP information valid period is set to Tx Hold multiplied by
Tx Interval seconds. Valid values are restricted to 2 - 10 times.
Tx Delay :

If some configuration is changed (e.g. the IP address) a new LLDP frame is transmitted,
but the time between the LLDP frames will always be at least the value of Tx Delay
seconds. Tx Delay cannot be larger than 1/4 of the Tx Interval value. Valid values are
restricted to 1 - 8192 seconds.
Tx Reinit :

When a port is disabled, LLDP is disabled or the switch is rebooted, an LLDP shutdown
frame is transmitted to the neighboring units, signaling that the LLDP information isn't valid
anymore. Tx Reinit controls the amount of seconds between the shutdown frame and a
new LLDP initialization. Valid values are restricted to 1 - 10 seconds.
LLDP Port Configuration
The LLDP port settings relate to the currently selected stack unit, as reflected by the page
header.
Port :

The switch port number of the logical LLDP port.
Mode :

Select LLDP mode.
Rx only The switch will not send out LLDP information, but LLDP information from neighbor
units is analyzed.
Tx only The switch will drop LLDP information received from neighbors, but will send out
LLDP information.
Disabled The switch will not send out LLDP information, and will drop LLDP information
received from neighbors.
Enabled The switch will send out LLDP information, and will analyze LLDP information
received from neighbors.
CDP Aware :

Select CDP awareness.
The CDP operation is restricted to decoding incoming CDP frames (The switch doesn't
transmit CDP frames). CDP frames are only decoded if LLDP on the port is enabled.
Only CDP TLVs that can be mapped to a corresponding field in the LLDP neighbors' table
are decoded. All other TLVs are discarded ( Unrecognized CDP TLVs and discarded CDP
frames are not shown in the LLDP statistics.). CDP TLVs are mapped onto LLDP
neighbors' table as shown below.
CDP TLV "Device ID" is mapped to the LLDP "Chassis ID" field.
CDP TLV "Address" is mapped to the LLDP "Management Address" field. The CDP
address TLV can contain multiple addresses, but only the first address is shown in the
LLDP neighbors' table.
CDP TLV "Port ID" is mapped to the LLDP "Port ID" field.
CDP TLV "Version and Platform" is mapped to the LLDP "System Description" field.
Both the CDP and LLDP support "system capabilities", but the CDP capabilities cover
capabilities that are not part of the LLDP. These capabilities are shown as "others" in the
114 Publication date: March, 2012
Revision A1