Building Blocks of LLDP

To enable LLDP on the firewall, click Edit, click Enable, and optionally configure the four settings shown in the following table, if the default settings do not suit your environment. The remaining table entries describe the status and peer statistics.
LLDP Settings
Configured In
Transmit Interval (sec)
LLDP General
Specify the interval, in seconds, at which LLDPDUs are transmitted (range is 1-3,600; default is 30).
Transmit Delay (sec)
Specify the delay time, in seconds, between LLDP transmissions sent after a change is made in a Type-Length-Value (TLV) element. The delay helps to prevent flooding the segment with LLDPDUs if many network changes spike the number of LLDP changes or if the interface flaps. The Transmit Delay must be less than the Transmit Interval (range is 1-600; default is 2).
Hold Time Multiple
Specify a value that is multiplied by the Transmit Interval to determine the total TTL hold time (range is 1-100; default is 4).
The TTL hold time is the length of time the firewall will retain the information from the peer as valid. The maximum TTL hold time is 65,535 seconds, regardless of the multiplier value.
Notification Interval
Specify the interval, in seconds, at which syslog and SNMP Trap notifications are transmitted when MIB changes occur (range is 1-3,600; default is 5).
spyglass filter
Optionally enter a data value in the filter row and click the gray arrow, which causes only the rows that include that data value to be displayed. Click the red X to Clear Filter.
Name of the interfaces that have LLDP profiles assigned to them.
LLDP status: enabled or disabled.
LLDP mode of the interface: Tx/Rx, Tx Only, or Rx Only.
Name of the profile assigned to the interface.
Total Transmitted
Count of LLDPDUs transmitted out the interface.
Dropped Transmit
Count of LLDPDUs that were not transmitted out the interface because of an error. For example, a length error when the system is constructing an LLDPDU for transmission.
Total Received
Count of LLDP frames received on the interface.
Dropped TLV
Count of LLDP frames discarded upon receipt.
Count of Time-Length-Value (TLV) elements that were received on the interface and contained errors. Types of TLV errors include: one or more mandatory TLVs missing, out of order, containing out-of-range information, or length error.
Count of TLVs received on the interface that are not recognized by the LLDP local agent, for example, because the TLV type is in the reserved TLV range.
Aged Out
Count of items deleted from the Receive MIB due to proper TTL expiration.
Clear LLDP Statistics
Select to clear all of the LLDP statistics.
spyglass filter
Optionally enter a data value in the filter row and click the gray arrow, which causes only the rows that include that data value to be displayed. Click the red X to Clear Filter.
Local Interface
Interface on the firewall that detected the neighboring device.
Remote Chassis ID
Chassis ID of the peer; the MAC address is used.
Port ID
LLDPPeers (cont)
Port ID of the peer.
Name of the peer.
More Info
Click More Info to see Remote Peer Details, which are based on the Mandatory and Optional TLVs.
Chassis Type
Chassis Type is MAC address.
MAC Address
MAC address of the peer.
System Name
Name of the peer.
System Description
Description of the peer.
Port Description
Port description of the peer.
Port Type
Interface name.
Port ID
Firewall uses the ifname of the interface.
System Capabilities
Capabilities of the system. O=Other, P=Repeater, B=Bridge, W=Wireless-LAN, R=Router, T=Telephone
Enabled Capabilities
Capabilities enabled on the peer.
Management Address
Management address of the peer.

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