Planet Networking & Communication SGS-5220 User Manual page 296

LLDP Parameters
Object
•
Tx Interval
•
Tx Hold
•
Tx Delay
•
Tx Reinit
LLDP Port Configuration
The LLDP port settings relate to the currently selected stack unit, as reflected by the page header.
Object
•
Port
•
Mode
Description
The switch is periodically transmitting LLDP frames to its neighbors 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.
Default: 30 seconds
This attribute must comply with the following rule:
(Transmission Interval * Hold Time Multiplier) ≤65536, and Transmission Interval
>= (4 * Delay Interval)
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.
TTL in seconds is based on the following rule:
(Transmission Interval * Holdtime Multiplier) ≤ 65536.
Therefore, the default TTL is 4*30 = 120 seconds.
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.
This attribute must comply with the rule:
(4 * Delay Interval) ≤Transmission Interval
When a port is disabled, LLDP is disabled or the switch is rebooted a 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.
Description
The switch port number of the logical LLDP port.
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
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User's Manual of SGS-5220 Series