116
Parameter
Description
LLDP Parameters
Tx Interval:
The switch periodically transmits LLDP frames to its neighbors to have
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. 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), a
LLDP shutdown frame is transmitted to the neighboring units to signal 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, 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.