Enabling LLDP

When LLDP is enabled on a device, the device sends LLDP packets carrying its status information to its LLDP-capable neighbors and obtains their status information by receiving LLDP packets from them.

Context

LLDP can be enabled globally or on an interface. The relationships are as follows:

LLDP is disabled on all interfaces after LLDP is disabled globally.
An interface can send and receive LLDP packets only when LLDP is enabled globally and on the interface.
The command to enable or disable LLDP on an interface is invalid when LLDP is disabled globally.

Procedure

Run system-view
The system view is displayed.
Run lldp enable
LLDP is enabled globally.
Run interface interface-type interface-number
The interface view is displayed.
(Optional) Run lldp admin-status { tx | rx | txrx }
The LLDP working mode is configured for the interface.
(Optional) Perform the following steps to enable LLDP on a sub-interface:
1. Run lldp vlan-mode enable
  The VLAN mode is enabled on the interface.
2. Run interface interface-type interface-number
  A sub-interface is created.
3. Run vlan-type dot1q vlan-id
  The sub-interface is associated with a VLAN.
4. Run lldp enable
  LLDP is enabled on the sub-interface.
- To enable LLDP on some interfaces and disable LLDP on other interfaces on a device, enable LLDP globally on the device and run the undo lldp enable command on the interfaces that do not need LLDP.
- For Eth-Trunk interfaces, LLDP can be configured only on Eth-Trunk member interfaces. Enabling or disabling LLDP on an Eth-Trunk member interface does not affect other member interfaces.
- Interfaces that support LLDP must be physical interfaces. Logical interfaces such as VLANIF and Eth-Trunk interfaces do not support LLDP.
- Interfaces do not support LLDP packets carrying the VLAN tag. If LLDP is used and the peer device is a non-Huawei router, configure the peer device not to carry the VLAN tag in sent LLDP packets.
- Before enabling LLDP on a sub-interface, you need to enable LLDP and configure the VLAN mode on the corresponding main interface.
Run commit
The configuration is committed.