The VLAN name TLV advertises a VLAN name for one or more VLANs on the port. You can advertise this TLV for tagged and untagged VLANs. When you enable this TLV for tagged VLANs, the TLV advertises the IEEE 802.1Q tag for that VLAN. For untagged VLANs, the internal tag is advertised.
If you do not specify a VLAN when you configure this TLV, the switch advertises all VLAN names on the specified ports. You can choose to advertise one or more VLANs for the specified ports by specifying the name of a VLAN in the configuration command. You can repeat the command to specify multiple VLANs.
To control advertisement of the port VLAN Name TLV, use the following command:
Because each VLAN name requires 32 bits and the LLDPDU cannot exceed 1500 bytes, we recommend that you configure each port to advertise no more than one or two specific VLANs. Optional TLVs that cause the LLDPDU length to exceed the 1500-byte limit are dropped.