Huawei AR150/200 Series, Руководство по настройке

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l L: information length
l V: content value
The LLDPDU carries different types of TLVs to meet the LLDP interaction requirements. The
device sends or receives the local and remote information by using these TLVs.
The LLDPDU starts with Chassis ID TLV, Port ID TLV, and Time to Live TLV, and ends with
End of LLDPDU TLV; therefore, these four TLVs are mandatory for an LLDPDU. The other
TLVs are optional. The device can add and remove the optional TLVs.
3.2 LLDP Feature Supported by the AR150/200
This section describes the usage scenarios of the LLDP feature and TLV types supported by the
AR150/200.
Usage Scenario
The LLDP feature of the AR150/200 is applicable to three types of networks.
Networks Where an Interface Has Only One Neighbor
The interfaces between two routers or the interfaces between a router and a media endpoint (ME)
are directly connected, so each interface has only one neighbor. As shown in
Figure 3-4 ,
RouterA is directly connected to RouterB and ME. Each interface on RouterA and RouterB has
only one neighbor.
Figure 3-4 Each interface has only one neighbor
Internet
Router A
RouterB ME
NMS
Networks Where an Interface Has Multiple Neighbors
The interfaces between two routers are connected through an unknown network, so each interface
has multiple neighbors. As shown in
Figure 3-5 , RouterA, RouterB, and RouterC are connected
through an unknown network. The devices on the unknown network may not have the LLDP
function or not be managed by the network management system (NMS); however, they must
Huawei AR150&200 Series Enterprise Routers
Configuration Guide - Network Management
3 LLDP Configuration
Issue 02 (2012-03-30) Huawei Proprietary and Confidential
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