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Procedure
1. Enter system view.
system-view
2. Enter Layer 2 or Layer 3 Ethernet interface view.
interface interface-type interface-number
3. Enable LLDP neighbor aging on the interface.
lldp neighbor-protection aging { block | shutdown }
By default, neighbor aging is disabled on an interface.
Configuring MAC address learning for DCN
About MAC address learning for DCN
For the data communication network (DCN) to implement operation, administration, and
maintenance on network elements (NEs), you must configure the NEs to learn their neighbors' MAC
addresses through LLDP.
An NE learns the MAC address of its neighbor through the ARP or ND entry generated based on the
management address TLV in LLDP frames received from the neighbor. For more information about
DCN, see Layer 3—IP Routing Configuration Guide.
MAC address learning for DCN tasks at a glance
Configuring MAC address learning for DCN on a Layer 2 Ethernet interface
1. Setting the source MAC address of LLDP frames
2. Enabling generation of ARP or ND entries for received management address TLVs
Configuring MAC address learning for DCN on a Layer 3 Ethernet interface
1. (Optional.) Setting the source MAC address of LLDP frames
2. Enabling generation of ARP or ND entries for received management address TLVs
Setting the source MAC address of LLDP frames
About setting the source MAC address of LLDP frames
This feature allows you to set the source MAC address of LLDP frames to the MAC address of a
VLAN interface or a Layer 3 Ethernet subinterface.
Restrictions and guidelines
In Layer 2 Ethernet interface view, you must configure this feature so the interface can use the MAC
address of a VLAN interface instead of its own MAC address as the source MAC address of LLDP
frames. This ensures that the neighbor NE can generate correct ARP or ND entries for the local NE.
Procedure
1. Enter system view.
system-view
2. Enter Ethernet interface view.
interface interface-type interface-number
3. Set the source MAC address of LLDP frames to the MAC address of a VLAN interface or a
Layer 3 Ethernet subinterface.
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