How to Specify TLV Units for the LLDP Packet of an Agent

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This procedure explains how to specify TLV units to be advertised in an LLDP packet that an agent transmits.

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(Optional) Identify the LLDP agent property that can contain the TLV unit that you want to add by displaying the TLV units.
```
# lldpadm show-agentprop agent
```
This command helps you to see the TLV units that are already set for each property. If you do not specify a property, this command displays all the LLDP agent properties and their TLV values. For a list of agent properties, see Figure 2, Table 2, Optional TLV Units for an LLDP Agent.
Add or remove the TLV unit from the property.
```
# lldpadm set-agentprop -p property[+|-]=value[,...] agent
```
You can use qualifiers to add (+) or remove (-) values from the list of values for properties that accept multiple values.

If you do not use the add (+) or remove (-) qualifiers, then the value that you set replaces all the values that were previously defined for the property.
(Optional) Display the new values for the property.
```
# lldpadm show-agentprop -p property agent
```

Example 35 Adding Optional TLV Units to an LLDP Packet

In the following example, the LLDP agent has net0 configured to advertise VLAN information in its LLDP packet. The LLDP packet is further configured to include system capabilities, link aggregation, and virtual NIC information as items that the LLDP can advertise. Later, the VLAN description is removed from the packet.

Display the existing agent properties.

# lldpadm show-agentprop net0
AGENT   PROPERTY   PERM   VALUE          EFFECTIVE   DEFAULT   POSSIBLE
net0    mode       rw     both             --        disable   txonly,rxonly,both,disable
net0    basic-tlv  rw     sysname,         --        none      none,portdesc,
                          sysdesc                              sysname,sysdesc,
                                                               syscapab,mgmtaddr,
                                                               all
net0    dot1-tlv   rw     vlanname,         --       none      none,vlanname,pvid,
                          pvid,pfc                             linkaggr,pfc,appln,
                                                               evb,etscfg,etsreco,all
net0    dot3-tlv   rw     max-framesize     --       none      none, max-framesize,
                                                               all
net0    virt-tlv   rw     none              --       none      none,vnic,all

The output displays the existing, default, and possible values for each property of the LLDP agent.

Set system capabilities, link aggregation, and network virtualization information as items to advertise over the network.
```
# lldpadm set-agentprop -p basic-tlv+=syscapab,dot1-tlv+=linkaggr,virt-tlv=vnic net0
```

Remove the VLAN description from the packet.

# lldpadm set-agentprop -p dot1-tlv-=vlanname net0

Display the agent properties.

# lldpadm show-agentprop -p net0
AGENT   PROPERTY   PERM   VALUE          EFFECTIVE   DEFAULT   POSSIBLE
net0    mode       rw     both             --        disable   txonly,rxonly,both,
                                                               disable
net0    basic-tlv  rw     sysname,         --        none      none,portdesc,
                          sysdesc,                             sysname,sysdesc,
                          syscapab                             syscapab,mgmtaddr,
                                                               all
net0    dot1-tlv   rw     pvid,pfc         --        none      none,vlanname,pvid,
                          linkaggr                             linkaggr,pfc,appln,
                                                               evb,etscfg,etsreco,all
net0    dot3-tlv   rw     max-framesize    --        none      none, max-framesize,
                                                               all
net0    virt-tlv   rw     vnic             --        none      none,vnic,all