Instruction Manual
133
LLDP
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.
Link Layer Discovery Protocol - Media Endpoint Discovery (LLDP-MED) is an
extension of LLDP intended for managing endpoint devices such as Voice over
IP phones and network switches. The LLDP-MED TLVs advertise information such
as network policy, power, inventory, and device location details. LLDP and LLDP-
MED information can be used by SNMP applications to simplify troubleshooting,
enhance network management, and maintain an accurate network topology.
Applying LLDP Global Settings
1.
On the
Global Settings
page, select the LLDP settings you want to apply:
•
Enabled:
Allows you to Globally Enable or Disable the LLDP settings.
•
LLDP PDU Disable Action:
Allows you to set an LLDP PDU setting:
•
Filtering:
If selected deletes all LLDP PDUs.
•
Bridging:
If selected transmits LLDP PDUs in the same VLAN
•
Flooding:
If selected transmits LLDP PDUs for all ports.
•
Transmission Interval:
Enter a transmission interval. The transmission
interval is the interval between LLDP Frame transmissions. The default
interval is set to 30 seconds. The Interval range is 5 - 32768 seconds. The
transmission interval multiplied by the hold time multiplier value must be
less than or equal to 65536 and/or the transmission internal must be greater
than or equal to the delay interval multiplied by 4.
•
Holdtime Multiplier:
Enter a hold time multiplier value. The hold time
multiplier value is multiplied by the transmission interval and determines
how long information in an LLDP frame is considered valid. Valid values are
2 - 10.
•
Re initialization Delay:
Enter a re initialization delay value. The re
initialization delay value Is the amount of time a shutdown frame and a new
