Setting lldp timing attributes – LevelOne GTL-2691 User Manual

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| Basic Administration Protocols

Link Layer Discovery Protocol

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ETTING

LLDP T

IMING

TTRIBUTES

Use the Administration > LLDP (Configure Global) page to set attributes for

general functions such as globally enabling LLDP on the switch, setting the

message ageout time, and setting the frequency for broadcasting general

advertisements or reports about changes in the LLDP MIB.

CLI R

EFERENCES

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"LLDP Commands" on page 1285

ARAMETERS

These parameters are displayed:

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LLDP – Enables LLDP globally on the switch. (Default: Enabled)

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Transmission Interval – Configures the periodic transmit interval for

LLDP advertisements. (Range: 5-32768 seconds; Default: 30 seconds)

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Hold Time Multiplier – Configures the time-to-live (TTL) value sent in

LLDP advertisements as shown in the formula below. (Range: 2-10;

Default: 4)
The time-to-live tells the receiving LLDP agent how long to retain all

information pertaining to the sending LLDP agent if it does not transmit

updates in a timely manner.
TTL in seconds is based on the following rule:
minimum value ((Transmission Interval * Holdtime Multiplier), or

65535)

Therefore, the default TTL is 4*30 = 120 seconds.

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Delay Interval – Configures a delay between the successive

transmission of advertisements initiated by a change in local LLDP MIB

variables. (Range: 1-8192 seconds; Default: 2 seconds)
The transmit delay is used to prevent a series of successive LLDP

transmissions during a short period of rapid changes in local LLDP MIB

objects, and to increase the probability that multiple, rather than single

changes, are reported in each transmission.
This attribute must comply with the rule:
(4 * Delay Interval) ≤

Transmission Interval

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Reinitialization Delay – Configures the delay before attempting to re-

initialize after LLDP ports are disabled or the link goes down.

(Range: 1-10 seconds; Default: 2 seconds)
When LLDP is re-initialized on a port, all information in the remote

systems LLDP MIB associated with this port is deleted.

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Notification Interval – Configures the allowed interval for sending

SNMP notifications about LLDP MIB changes. (Range: 5-3600 seconds;

Default: 5 seconds)
This parameter only applies to SNMP applications which use data stored

in the LLDP MIB for network monitoring or management.
Information about changes in LLDP neighbors that occur between SNMP

notifications is not transmitted. Only state changes that exist at the

time of a notification are included in the transmission. An SNMP agent