Qtech QSW-3200-28FC [115/136] Brief introduction of lldp protocol

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Chapter 15 LLDP CONFIGURATION

15.1 Brief introduction of LLDP protocol

LLDP (Link Layer Discovery Protocol) is the new protocol defined by IEEE 802.1AB. It realizes

proclaiming information about itself to other neighbor devices through network and receives

the bulletin information from neighbor devices and stores it to standard MIB of LLDP. It is

convenient for user to check the device model and linked interfaces of downlink neighbor

devices and maintains central office and manage network. Network administrator can know the

link of network layer 2 by accessing MIB.

15.2 LLDP configuration

15.2.1 LLDP configuration list

The configuration can be effective only after LLDP enables. Configure related parameter of

devices or Ethernet interface before enabling LLDP and these configurations will be saved

after disabling LLDP. And the parameter will be effective after re-enabling LLDP. LLDP

configuration list is as following:

 Enable/disable global LLDP

 Configure LLDP hello-time

 Configure LLDP hold-time

 Interface LLDP packet receiving/sending mode configuration

 Display LLDP information

15.2.2 Enable/disable global LLDP

Use following command in global configuration mode:

 Enable global LLDP

lldp

 Disable global LLDP

no lldp

By default, global LLDP disables.

For example:

! Enable global LLDP

QTECH(config)#lldp

15.2.3 Configure LLDP hello-time

Use following command in global configuration mode:

 Configure LLDP hello-time

lldp hello-time <5-32768>

 Restore default LLDP hello-time

no lldp hello-time

The default LLDP hello-time is 30 seconds

For example:

! Configure LLDP hello-time to be 10

QTECH(config)#lldp hello-time 10