Series AFS8202M
Alba Fiber Systems Inc. Specifications are subject to change without notice.
Page 31 6/20/14
www.albafiber.net
Industrial Redundant Managed Ethernet Media Converter with 2 Ports
1 x 10/100/1000BaseT(X) Port, 1 x 1000M SFP Port
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.
6.3.1 Configuring Link Layer Discovery Protocol
Use the LLDP Configuration page to set the timing attributes used for the transmission of LLDP
advertisements, and the device information which is advertised.
PATH
Switch, LLDP
PARAMETERS
These parameters are displayed:
LLDP Timing Attributes
■
Tx Interval
–
Configures the periodic transmit interval for LLDP advertisements. (Range: 5-
32768 seconds; Default: 30 seconds) This attribute must comply with the following rule:
(Transmission Interval * Transmission Hold Time)
≤
65536, and Transmission Interval
≥
(4 *
Transmission Delay)
■
Tx Hold
–
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: (Transmission Interval *
Transmission Hold Time)
≤
65536. Therefore, the default TTL is 30*3 = 90 seconds.
■
Tx Delay
–
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 * Transmission Delay)
≤
Transmission Interval
■
Tx Reinit
–
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 system’s LLDP MIB associated with this port is
deleted. LLDP Interface Attributes
■
Port
–
Port identifier.
■
Mode
–
Enables LLDP message transmit and receive modes for LLDP Protocol Data Units.
(Options: Disabled, Enabled – Tx Rx, Rx only, Tx only; Default: Disabled)
