View LLDP Reception Statistics

Use this procedure to view the LLDP reception statistics. You can also view these statistics graphically.

About this task

LLDP operates at the port interface level. Enabling FA on a port automatically enables LLDP transmission and reception on that port. It also enables traffic tagging and disables spanning tree on that port.

Enabling FA on an MLT enables LLDP transmission and reception on all ports in that MLT. 

Note

Note

When a port is removed from an MLT, LLDP transmission on that port stops and spanning tree is enabled. Any I-SID-to-VLAN mappings on that port are removed, if not already learned on any other port in the MLT. This also causes the Switched UNI I-SID to be deleted from the MLT. If however, the mappings are learned on another port on the MLT, then the Switched UNI I-SID continues to exist for that MLT.

For ports in an LACP MLT, when FA is enabled, tagging is enabled on all ports in the LACP MLT. The consistency check for FA is based on key membership. If all ports with the same key do not support FA, FA is not successfully enabled on those ports.

Procedure

  1. In the navigation pane, expand Configuration > Serviceability > Diagnostics > 802_1ab.
  2. Select LLDP.
  3. Select the RX Stats tab.
  4. Optional: To view the reception statistics graphically for a port:
    1. Select a row, and then select Graph.
    2. Select one or more of the parameters, and then select the appropriate icon on the top left of the menu bar to draw a line chart, area chart, bar chart or a pie chart.
    3. Select Refresh Counters to clear the existing counters, and fix a reference point in time to restart the counters.
    4. Select Export to export the statistical data to a file.
    5. To fix a poll interval, select an appropriate value from Poll Interval.

RX Stats Field Descriptions

Use the data in the following table to use the RX Stats tab.

Name

Description

PortNum

Specifies the port number.

FramesDiscardedTotal

Specifies the number of LLDP frames received on the port, but discarded, for any reason.

This counter provides an indication of possible LLDP header formatting problems in the sending system, or LLDP PDU validation problems in the receiving system.

FramesErrors

Specifies the number of invalid LLDP frames received on the port.

FramesTotal

Specifies the total number of LLDP frames received on the port.

TLVsDiscardedTotal

Specifies the number of LLDP TLVs discarded on the port, for any reason.

TLVsUnrecognizedTotal

Specifies the number of LLDP TLVs on the port, that are unrecognized on that port.

An unrecognized TLV is referred to as the TLV whose type value is in the range of reserved TLV types (000 1001–111 1110). An unrecognized TLV could be, for example, a basic management TLV from a later LLDP version.

AgeoutsTotal

Specifies the number of LLDP age-outs that occur on a specific port.

An age-out is the number of times the complete set of information advertised by a particular MSAP is deleted, because the information timeliness interval has expired.
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