TRENDnet TL2-FG142, User Manual

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TRENDnet User’s Guide
TL2-FG142
61
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, signalling
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
Items Description
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 neighbour units is analyzed.
Tx only The switch will drop LLDP information received from neighbours,
but will send out LLDP information.
Disabled The switch will not send out LLDP information, and will drop
LLDP information received from neighbours.
Enabled The switch will send out LLDP information, and will analyze LLDP
information received from neighbours.
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
neighbours' 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 neighbours' 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 neighbours 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 neighbours' table.
If all ports have CDP awareness disabled the switch forwards CDP frames
received from neighbour devices. If at least one port has CDP awareness
enabled all CDP frames are terminated by the switch.
Note: When CDP awareness on a port is disabled the CDP information
isn't removed immediately, but gets removed when the hold time is
exceeded.
Port Descr Optional TLV: When checked the "port description" is included in LLDP
information transmitted.
Sys Name Optional TLV: When checked the "system name" is included in LLDP
information transmitted.
Sys Descr Optional TLV: When checked the "system description" is included in
LLDP information transmitted.
Sys Capa Optional TLV: When checked the "system capability" is included in LLDP
information transmitted.
Mgmt Addr Optional TLV: When checked the "management address" is included in
LLDP information transmitted.
Button
Click to save changes.