Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Link Layer Discovery Protocol (LLDP) Snooping

 

BTI7800 transport interfaces configured for Ethernet (10ge and 100ge) can be provisioned to snoop Link Layer Discovery Protocol (LLDP) frames to gather information about attached equipment. This information can then be accessed via the CLI or NETCONF and used to identify neighbor devices.

Note

LLDP snooping is supported starting with release 4.1.

Figure 1: LLDP Snooping
LLDP Snooping

LLDP data units, which are sent inside Ethernet frames at fixed intervals and identified by their destination Media Access Control (MAC) address and EtherType, carry device information in mandatory and optional type–length values (TLVs). Mandatory TLVs include device information such as chassis and port identification and system capabilities.

Configuring LLDP Snooping on an Ethernet Interface

Use this procedure to enable or disable LLDP snooping on an Ethernet interface (10ge or 100ge).

Note

LLDP snooping is supported in the receive direction only and is disabled by default.

  1. Enter configuration mode.
    bti7800# config
  2. Configure LLDP snooping on an Ethernet interface.

    For example, to enable LLDP snooping:

    bti7800(config)# interface 10ge:1/2/1/1/1 lldp-snoop enable

    To disable LLDP snooping:

    bti7800(config)# interface 10ge:1/2/1/1/1 lldp-snoop disable
  3. Repeat the previous step for each Ethernet interface for which you want to configure LLDP snooping.
  4. Use the following show commands to either confirm the configuration changes or retrieve LLDP data.
    • show interface lldp table to retrieve a listing of all interfaces on which LLDP snooping is enabled.

    • show interface lldp name:identifier to retrieve LLDP neighbor data for an LLDP-enabled interface.

    • show interface name:identifier to view the value ( enabled or disabled ) of the LLDP snooping parameter for the specified interface.

Supported LLDP TLVs

BTI7800 only supports mandatory LLDP TLVs (Table 1), which provide information about a network-attached device (neighbor) for an LLDP-enabled Ethernet interface.

Table 1: Mandatory LLDP TLVs

TLV

Description

Range

Time to Live

The amount of time (in seconds) that received LLDP data units will be retained

0 to 65,535

Chassis ID Type

Chassis identifier type

  • chassis-component

  • interface-alias

  • port-component

  • mac-address

  • network-address

  • interface-name

  • local

Chassis ID

Chassis identifier as per chassis identifier type

String (1 to 255 characters)

Port ID Type

Port identifier type

  • interface-alias

  • port-component

  • mac-address

  • network-address

  • interface-name

  • agent-circuit-id

  • local

Port ID

Port identifier as per port identifier type

String (1 to 255 characters)

Port Description

Port description (text)

String (0 to 255 characters)

System Name

Administratively assigned system name

String (0 to 255 characters)

System Description

System description (text)

String (0 to 255 characters)

System Capabilities Supported

Supported system capabilities

List containing any of the following:

  • repeater

  • bridge

  • vlan-access-point

  • router

  • telephone

  • docsis-cable-device

  • station-only

  • other

  • ip-v4

  • ip-v6

  • other

System Capabilities Enabled

Enabled system capabilities

Management Address Type

Management address identifier type

  • ip-v4

  • ip-v6

  • other

Management Address

Management address as per identifier type

String (0 to 255 characters)

Management Interface Subtype

Management interface number subtype

  • if-index

  • system-port-number

  • unknown

Management Interface Number

Interface number that identifies the specific interface associated with the management address

32-bit integer

Management Interface OID

Object identifier (OID) that identifies the entity associated with the management address

String (OID format)

Release History Table
Release
Description
LLDP snooping is supported starting with release 4.1.