Siemens S223, S323 Link Layer Discovery Protocol Lldp, Lldp Operation Type, Basic TLV

User Manual	UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5

7.3Link Layer Discovery Protocol (LLDP)

Link Layer Discovery Protocol (LLDP) is the function of transmitting data for network management for the switches connected in LAN according to IEEE 802.1ab standard.

7.3.1LLDP Operation

The hiD 6615 S223/S323 supporting LLDP transmits the management information be- tween near switches. The information carries the management information that can rec- ognize the switches and the function. This information is saved in internal MIB (Manage- ment Information Base)

When LLDP starts to operate, the switches send their information to near switches. If there is some change in local status, it sends their changed information to near switch to inform their status. For example, if the port status is disabled, it informs that the port is disabled to near switches. And the switch that receives the information from near switches processes LLDP frame and saves the information of the other switches. The information received from other switches is aged.

7.3.2LLDP Operation Type

If you activated LLDP on a port, configure LLDP operation type.

Each LLDP operation type works as the follow:

•both: sends and receive LLDP frame.

•tx_only: only sends LLDP frame.

•rx_only: only receives LLDP frame.

•disable: does not process any LLDP frame.

To configure how to operate LLDP, use the following command.

Command	Mode	Description
lldp adminstatus PORTS {both	Bridge	Configurs LLDP operation type.
tx_only rx_only disable}		(default: disable)

7.3.3Basic TLV

LLDP is transmitted through TLV. There are mandatory TLV and optional TLV. In optional TLV, there are basic TLV and organizationally specific TLV. Basic TLV must be in the switch where LLDP is realized, specific TLV can be added according to the feature of the switch.

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