Filter
Top Products
LGB5128A User Manual
88
Tx Hold :
Each LLDP frame contains information about how long the information in the LLDP frame
will 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
LLDP neighbors’ table.
If all ports have CDP awareness disabled, the switch forwards CDP frames received from
neighbor devices. If at least one port has CDP awareness enabled, all CDP frames are
terminated by the switch.