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

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.

Note

If a slot is removed from the switch chassis, the statistics are not displayed on the slot ports. When the slot is inserted back again, the statistics counters are reset.

Procedure

In the navigation pane, expand Configuration > Serviceability > Diagnostics > 802_1ab.
Click LLDP.
Click the RX Stats tab.
To view the reception statistics graphically for a port:
1. Select a row and click Graph.
  The RX Stats-Graph,<port-number> tab displays.
  
  You can view a graphical representation of the following data:
  - FramesDiscardedTotal — Total number of LLDP received frames that were discarded.
  - FramesErrors — Total number of erroneous LLDP frames received.
  - FramesTotal — Total number of frames received.
  - TLVsDiscardedTotal — Total number of received TLVs that were discarded.
  - TLVsUnrecognizedTotal — Total number of unrecognized TLVs received.
2. Select one of the above parameters and click the appropriate icon on the top left-hand-side corner of the menu bar to draw a line chart, area chart, bar chart or a pie chart.
3. Click Clear Counters to clear the existing counters, and fix a reference point in time to restart the counters.
4. Click Export, to export the statistical data to a file.
5. To fix a poll interval, select an appropriate value from the Poll Interval drop-down list.

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.