Link Layer Discovery Protocol; Configuring Lldp Timing And Tlvs - AMX NXA-ENET8-2POE Operation/Reference Manual

4.
Enter the IP address of the multicast service to be filtered.
5.
Click Save.

Link Layer Discovery Protocol

Link Layer Discovery Protocol (LLDP) is used to discover basic information about neighboring devices on the
local broadcast domain. LLDP is a Layer 2 protocol that uses periodic broadcasts to advertise information
about the sending device. Advertised information is represented in Type Length Value (TLV) format according
to the IEEE 802.1AB standard, and can include details such as device identification, capabilities and
configuration settings. LLDP also defines how to store and maintain information gathered about the
neighboring network nodes it discovers.

Configuring LLDP Timing and TLVs

Use the LLDP Configuration page to set the timing attributes used for the transmission of LLDP
advertisements, and the device information which is advertised.
FIG. 82 LLDP Configuration
LLDP Configuration parameters
LLDP Timing Attributes
• Tx Interval
• Tx Hold
• Tx Delay
• Tx Reinit
NXA-ENET8-2POE Gigabit Ethernet Layer 2 PoE Switch
Configures the periodic transmit interval for LLDP advertisements. (Range: 5-
32768 seconds; Default: 30 seconds)
Configures the time-to-live (TTL) value sent in LLDP advertisements as shown in
the formula below. (Range: 2-10; Default: 3)
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 30*3 = 90 seconds.
Configures a delay between the successive transmission of advertisements initi-
ated 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 * Transmission Delay). Transmission Interval
Configures the delay before attempting to re-initialize after LLDP ports are dis-
abled 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 system's LLDP
MIB associated with this port is deleted.
Configuring the NXA-ENET8-2POE
109