Zte ZXR10 2910E-PS Configuration Manual page 172

ZXR10 2900E Series Configuration Guide
3. The MIB of the local device stores the network management information of all
neighbor devices, and a network management program can query layer-2 connection
information in the MIB.
The LLDP is not a configuration protocol of the remote system or a signaling control
protocol used between two ports. The LLDP discovers layer-2 protocol configuration
conflicts between neighbor devices, but it only reports the problem to an upper-layer
network management device, without providing any mechanism to solve the problem.
The LLDP is simply a neighbor discovery protocol that defines a standard for network
devices (such as switches, routers, and WLAN access points) in the Ethernet to advertise
their identities to other nodes in the network and store discovery information of all neighbor
devices. For example, device configuration and device IDs can be advertised by the LLDP.
The LLDP defines a universal advertisement information set, a protocol for sending
the advertisement information, and a method for storing the received advertisement
information. The device that wants to advertise its information can place multiple pieces
of advertisement information into a Link Layer Discovery Protocol Data Unit (LLDPDU).
The LLDPDU contains a variable-length message unit (called TLVs), which are described
below:
l
Type: indicates the type of the message to be sent.
l Length: indicates the number of bytes in the message.
l Value: indicates the contents to be sent.
Each LLDPDU contains four mandatory TLVs and one optional TLV:
l
Chassis ID TLV and Port ID TLV: identify the sender.
l
TLL TLV: notifies the receiver of the storage period of a message. If the receiver does
not receive any update message within the specified period, the receiver discards all
the related messages. A recommended update frequency is defined by the IEEE, that
is, to send messages at 30-second intervals.
l
Optional TLVs: include a basic management TLV set (such as port description TLV), a
special TLV set defined by IEEE 802.1, and a special TLV set defined by IEEE 802.3.
l
End of LLDPDU TLV: indicates the end of an LLDPDU.
Configuring LLDP
The LLDP configuration includes the following commands:
Command
zte(cfg)#lldp hellotime <5-32768>
zte(cfg)#lldp holdtime <2-10>
zte(cfg)#lldp max-neighbor <1-31>
zte(cfg)#lldp {port <portlist>| trunk <trunklist>}{enable | disable}
SJ-20120409144109-002|2012-07-02(R1.0)
Function
Sets the interval for sending LLDP
neighbor discovery messages.
Sets the LLDP neighbor holding time.
Sets the maximum number of neighbors
that can be discovered by LLDP.
Enables or disables all LLDP functions
on a specific port.
4-126
ZTE Proprietary and Confidential