show lldp stats

Syntax

show lldp stats<PORT-LIST>
        

Description

Displays (globally) an overview of neighbor detection activity on the switch, plus data on the number of frames sent, received, and discarded per-port. The per-port LLDP statistics command enhances the list of per-port statistics provided by the global statistics command with some additional per-port LLDP statistics.

Parameters and options

Global LLDP counters

Neighbor Entries List Last Updated

The elapsed time since a neighbor was last added or deleted.

New Neighbor Entries Count

The total of new LLDP neighbors detected since the last switch reboot. Disconnecting, and then reconnecting a neighbor increments this counter.

Neighbor Entries Deleted Count

The number of neighbor deletions from the MIB for AgeOut Count and forced drops for all ports.

For example, if the admin status for port on a neighbor device changes from tx_rx or txonly to disabled or rxonly, the neighbor device sends a "shutdown" packet out the port and ceases transmitting LLDP frames out that port.

The device receiving the shutdown packet deletes all information about the neighbor received on the applicable inbound port and increments the counter.

This can occur, for example, when a new neighbor is detected when the switch is already supporting the maximum number of neighbors. See Neighbor maximum.

Neighbor Entries Dropped Count

The number of valid LLDP neighbors the switch detected, but could not add.

Neighbor Entries AgeOut Count

The number of LLDP neighbors dropped on all ports because of Time-to-Live expiring.

Per-port LLDP counters

NumFramesRecvd

The total number of valid, inbound LLDP advertisements received from any neighbors on <PORT-LIST> .

Where multiple neighbors are connected to a port through a hub, this value is the total number of LLDP advertisements received from all sources.

NumFramesSent

The total number of LLDP advertisements sent from <PORT-LIST> .

NumFramesDiscarded

The total number of inbound LLDP advertisements discarded by <PORT-LIST> .

This can occur, for example, when a new neighbor is detected on the port, but the switch is already supporting the maximum number of neighbors. See Neighbor maximum. This can also be an indication of advertisement formatting problems in the neighbor device.

Frames Invalid

The total number of invalid LLDP advertisements received on the port.

An invalid advertisement can be caused by header formatting problems in the neighbor device.

TLVs Unrecognized

The total number of LLDP TLVs received on a port with a type value in the reserved range.

This can be caused by a basic management TLV from a later LLDP version than the one currently running on the switch.

TLVs Discarded

The total number of LLDP TLVs discarded for any reason. In this case, the advertisement carrying the TLV may be accepted, but the individual TLV is not usable.

Neighbor Ageouts

The number of LLDP neighbors dropped on the port because of Time-to-Live expiring.