Enabling LLDP Basic Optional TLVs

This section explains the configuration for enabling basic optional TLVs for transmission.

The following are the basic optionally TLVs in LLDP

• Port Description TLV
• System Name TLV
• System Description TLV
• System Capabilities TLV

1. Enable basic optional TLVs by executing the following commands.

• Enter the Global Configuration mode

your product# configure terminal

• Enable Basic Optional TLVs on port P1.

your product(config)# interface gigabitethernet 0/1
your product(config-if)# lldp tlv-select basic-tlv port-descr sys-name sys-descr sys-capab mgmt-addr all

• Exit from the Global Configuration mode.

your product(config)# end

2. View the local system information by executing the following commands.

your product# show lldp local gigabitethernet 0/1

Port Id SubType : Interface Alias
Port Id : Slot0/1
Port Description : Ethernet Interface
Enabled Tx Tlvs : Port Description, System Name, System Description, System Capability, Management Address
Extended 802.3 TLV Info
-MAC PHY Configuration & Status
Auto-Neg Support & Status : Not Supported, Disabled
Advertised Capability Bits : 0000
Operational MAU Type : 0
-Link Aggregation
Capability & Status : Not Capable, Not In Aggregation
Aggregated Port Id : 1
-Maximum Frame Size : 1500
Extended 802.1 TLV Info
-Port VLAN Id : 1
-Port & Protocol VLAN Id
Protocol VLAN Id Support Protocol VLAN Status TxStatus
---------------- ------- -------------------- --------
0 Supported Enabled Disabled
-Vlan Name
Vlan Id Vlan Name TxStatus

------- --------- --------
1 Disabled
------------------------------------------------------

your product# show lldp local mgmt-addr

Management Address TxEnabledPorts
------------------ --------------
12.0.0.1 Gi0/1 Output

Enabling Specific Management Address

Management address TLV transmission status is Disabled by default; if a management address is configured for the system or the existing management address is changed, the TLV transmission status of the management address is Disabled.

Scenario 1:
If a new IP address is configured for the system, the address is not transmitted by default (the TLV transmission status of the newly configured IP address is Disabled).

1. Create VLAN 2 with IP address 15.0.0.1 by executing the following commands.

your product# configure terminal
your product(config)# switch default
your product(config-switch)# vlan 2
your product(config-switch-vlan)# ports gigabitethernet 0/1
your product(config-switch-vlan)# end
your product# configure terminal
your product(config)# interface vlan 2
your product(config-if)# ip address 15.0.0.1 255.255.255.0
your product(config-if)# no shutdown
your product(config-if)# end

• View the IP addresses that are configured for the system and the TLV transmission status of the addresses by executing the following command.

your product# show lldp local mgmt-addr

Management Address TxEnabledPorts
------------------ --------------
12.0.0.1 Gi0/1
15.0.0.1

• Enable the newly configured management address (15.0.0.1) for transmission by executing the following commands.

• Enter the Global Configuration mode.

your product# configure terminal

• Enable LLDP.

your product(config)# interface gigabitethernet 0/1
your product(config-if)# lldp tlv-select basic-tlv mgmt-addr ipv4 15.0.0.1

• Exit from the Global Configuration mode.

your product(config)# end

• View the IP addresses that are configured for the system and TLV transmission status of the addresses by executing the following command.

your product# show lldp local mgmt-addr

Management Address TxEnabledPorts
------------------ --------------
12.0.0.1            Gi0/1
15.0.0.1            Gi0/1

Scenario 2:

If the IP address for the existing IP interface is changed, the address is treated as deletion of one management address and addition of new management address by LLDP.

1. Change the IP address of VLAN 2 as 16.0.0.1 by executing the following commands

your product# configure terminal
your product(config)# interface vlan 2
your product(config-if)# shutdown
your product(config-if)# ip address 16.0.0.1 255.255.255.0
your product(config-if)# no shutdown
your product(config-if)# end

The TLV transmission status of 16.0.0.1 is disabled by default.

• View the IP addresses that are configured for the system and the TLV transmission status of the addresses by executing the following command.

your product# show lldp local mgmt-addr

Management Address TxEnabledPorts
------------------ --------------
12.0.0.1 Gi0/1
16.0.0.1