TLV Unit Properties

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Each TLV unit has properties that you can further configure with specific values. If the TLV unit is enabled as an LLDP agent's property, then that TLV unit is advertised in the network only with the specified values. For example, consider the TLV unit syscapab, which advertises a system's capabilities. These capabilities can potentially include support for routers, bridges, repeaters, telephones, and other devices. However, you can set syscapab so that only those capabilities that are actually supported on your specific system, such as routers and bridges, are advertised.

The procedure for configuring TLV units depends on whether you are configuring global TLV units or per-agent TLV units. For information about how to configure TLV units, see Specifying TLV Units and Values for the LLDP Packet of an Agent.

Global TLV units apply to all LLDP agents on the system. The following table lists the global TLV units and their corresponding possible configurations.

Table 5-2 Global TLV Units and Their Properties

TLV Unit	Property Name	Possible Property Values	Value Description
`syscapab`	`supported`	`other`, `repeater`, `bridge`, `wlan-ap`, `router`, `telephone`, `docsis-cd`, `station`, `cvlan`, `sylvan`, `tpmr`	Represents the primary supported functions of the system. Default values are `router`, `station`, and `bridge`.
	`enabled`	Subset of the values listed for `supported`	Represents the enabled functions of the system.
`mgmtaddr`	`ipaddr`	`ipv4` or `ipv6`	Specifies the type of IP addresses that are associated with the local LLDP agent. The addresses are used to reach higher layer entities and assist in discovery by network management. Only one type can be specified.

TLV units that are specific to LLDP agent are managed on a per-agent basis. With per-agent TLV units, the values that you provide are used when the TLV unit is enabled for transmission by a specific LLDP agent.

The following table lists the TLV values and their corresponding possible configurations for an LLDP agent.

Table 5-3 Per-Agent TLV Units and Their Properties

TLV Unit	Property Name	Possible Property Values	Value Description
`pfc`	`willing`	`on`, `off`	Sets an LLDP agent to accept or reject configuration information from a remote machine that pertains to priority-based flow control.
`appln`	`apt`	Values are taken from the information that is defined in the Application Priority Table.	Configures the Application Priority Table. This table contains the list of application TLV units and their corresponding priorities. The application is identified by the `id`/`selector` pair. The contents of the table use the following format: `id/selector/priority` For more information, see Application Priority Configurations.
`etscfg`	`willing`	`on`, `off`	Sets an LLDP agent to accept or reject configuration information from a remote machine that pertains to enhanced transmission selection.

For information about per-agent TLV units, see Chapter 6, Managing Converged Networks by Using Data Center Bridging.