# Viewing unknown TLVs received

With the Unknown TLV tab, you can view details about unknown TLVs received on the local system.

To view the Unknown TLV tab:

## Procedure steps

1. From the navigation tree, double-click Edit.

2. From the Edit tree, double-click Diagnostics.

3. From the Diagnostics tree, double-click 802.1AB.

4. From the 802.1AB tree, double-click LLDP.

5. Select the Unknown TLV tab.

The following table outlines the parameters of the LLDP Unknown TLV tab.

Table 1. Variable definitions
Variable | Value
--- | ---
TimeMark | The TimeFilter for this entry.
LocalPortNum | Identifies the local port on which the remote system information is received.
Index | An arbitrary local integer value used by this agent to identify a particular MSAP. An agent is encouraged to assign monotonically increasing index values to new entries, starting with one, after each reboot.
UnknownTLVType | The value extracted from the type field of the unknown TLV.
UnknownTLVInfo | The value extracted from the value field of the unknown TLV.