Per-port (outbound) data options

The following table lists the information the switch can include in the per-port, outbound LLDP packets it generates. In the default configuration, all outbound LLDP packets include this information in the TLVs transmitted to neighbor devices. However, you can configure LLDP advertisements on a per-port basis to omit some of this information (Configuring a remote management address for outbound LLDP advertisements (CLI)).

Data available for basic LLDP advertisements

Data type

Configuration options

Default

Description

Time-to-Live

1

120 Seconds

The length of time an LLDP neighbor retains the advertised data before discarding it.

Chassis Type2,

N/A

Always Enabled

Indicates the type of identifier used for Chassis ID.

Chassis ID33

N/A

Always Enabled

Uses base MAC address of the switch.

Port Type4,33

N/A

Always Enabled

Uses "Local," meaning assigned locally by LLDP.

Port Id33

N/A

Always Enabled

Uses port number of the physical port. This is an internal number reflecting the reserved slot/port position in the chassis. For more information on this numbering scheme, see the appendix "MAC Address Management".

Remote Management Address

Type3,3

N/A

Always Enabled

Shows the network address type.

Address55

Default or Configured

Uses a default address selection method unless an optional address is configured. See Remote management address.

System Name33

Enable/Disable

Enabled

Uses the switch's assigned name.

System Description33

Enable/Disable

Enabled

Includes switch model name and running software version, and ROM version.

Port Description33

Enable/Disable

Enabled

Uses the physical port identifier.

System capabilities supported3,3

Enable/Disable

Enabled

Identifies the switch's primary capabilities (bridge, router).

System capabilities enabled3,66 3

Enable/Disable

Enabled

Identifies the primary switch functions that are enabled, such as routing.

1

The Packet Time-to-Live value is included in LLDP data packets.

2

Subelement of the Chassis ID TLV.

3

Populated with data captured internally by the switch. For more on these data types, refer to the IEEE P802.1AB Standard.

4

Subelement of the Port ID TLV.

5

Subelement of the Remote-Management-Address TLV.

6

Subelement of the System Capability TLV.