4 Web-based Switch Configuration
D-Link Smart Managed Switch User Manual
64
Daylight Saving Time Offset:
Use this drop-down menu to specify the amount of time that will constitute
your local DST offset -
30
,
60
,
90
, or
120
minutes.
Time Zone Offset GMT +/- HH:MM:
Use these drop-down menus to specify your local time zone's offset
from Greenwich Mean Time (GMT.)
Daylight Saving Time Settings:
From: Month / Day:
Enter the month DST and date DST will start on, each year.
From: HH:MM:
Enter the time of day that DST will start on, each year.
To: Month / Day:
Enter the month DST and date DST will end on, each year.
To: HH:MM:
Enter the time of day that DST will end on, each year.
Click the
Apply
button to implement changes made.
L2 Functions > LLDP > LLDP Global Settings
LLDP (Link Layer Discovery Protocol)
provides IEEE 802.1AB standards-based method for switches to
advertise themselves to neighbor devices, as well as to learn about neighbor LLDP devices. SNMP utilities
can learn the network topology by obtaining the MIB information in each LLDP device. The LLDP function is
enabled by default.
Figure 4.72 – L2 Functions > LLDP > LLDP Global Settings
LLDP:
When this function is
Enabled
, the switch can start to transmit, receive and process the LLDP packets.
For the advertisement of LLDP packets, the switch announces the information to its neighbor through ports.
For the receiving of LLDP packets, the switch will learn the information from the LLDP packets advertised
from the neighbor in the neighbor table. Click
Apply
to make the change effective.
Message TX Hold Multiplier (2-10):
This parameter is a multiplier that determines the actual TTL value
used in an LLDPDU. The default value is
4
.
Message TX Interval (5-32768):
This parameter indicates the interval at which LLDP frames are transmitted
on behalf of this LLDP agent. The default value is
30
seconds.
LLDP ReInit Delay (1-10):
This parameter indicates the amount of delay from the time adminStatus
becomes "disabled" until re-initialization is attempted. The default value is
2
seconds.
LLDP TX Delay (1-8192):
This parameter indicates the delay between successive LLDP frame
transmissions initiated by value or status changes in the LLDP local systems MIB. The value for txDelay is
set by the following range formula: 1 < txDelay < (0.25 °— msgTxInterval). The default value is
2
seconds.
L2 Functions > LLDP > LLDP-MED Settings
LLDP-MED (Link Layer Discovery Protocol-Media Endpoint Discovery) is an enhancement of LLDP. It
improves the LLDP operation between endpoint devices such as IP phones and APs. LLDP-MED supports
features such as Auto-discovery of LAN policies and device location discovery.
This page allows user to configure the
Power PSE TLV
(Type-length-value) state of 802.3at ports. Select
From Port/ To Port
and
Enable / Disable
and then click
Apply
to turn on/off the
Power PSE TLV
transmission.
