Manual TP-LINK TL-SG2216 (page 139 of 183) (English)

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application

requirement.

SNMP v1: SNMP v1 adopts Community Name authentication. The community name is used to

define the relation between SNMP Management Station and SNMP Agent. The SNMP packets

failing to pass community name authentication are discarded. The community name can limit

access to SNMP Agent from SNMP NMS, functioning as a password.

SNMP v2c: SNMP v2c also adopts community name authentication. It is compatible with SNMP

v1 while enlarges the function of SNMP v1.

SNMP v3: Based on SNMP v1 and SNMP v2c, SNMP v3 extremely enhances the security and

manageability. It adopts VACM (View-based Access Control Model) and USM (User-Based

Security Model) authentication. The user can configure the authentication and the encryption

functions. The authentication function is to limit the access of the illegal user by authenticating the

senders of packets. Meanwhile, the encryption function is used to encrypt the packets transmitted

between SNMP Management Station and SNMP Agent so as to prevent any information being

stolen. The multiple combinations of authentication function and encryption function can

guarantee a more reliable communication between SNMP Management station and SNMP Agent.

 MIB Introduction

To uniquely identify the management objects of the device in SNMP messages, SNMP adopts the

hierarchical architecture to identify the managed objects. It is like a tree, and each tree node

represents a managed object, as shown in the following figure. Thus the object can be identified

with the unique path starting from the root and indicated by a string of numbers. The number string

is the Object Identifier of the managed object. In the following figure, the OID of the managed

object B is {1.2.1.1}. While the OID of the managed object A is {1.2.1.1.5}.

Figure 12-2 Architecture of the MIB tree

 SNMP Configuration Outline

1. Create View

The SNMP View is created for the SNMP Management Station to manage MIB objects. The

managed object, uniquely identified by OID, can be set to under or out of the management of

SNMP Management Station by configuring its view type (included/excluded). The OID of managed

object can be found on the SNMP client program running on the SNMP Management Station.

2. Create SNMP Group

After creating the SNMP View, it’s required to create a SNMP Group. The Group Name, Security

Model and Security Level compose the identifier of the SNMP Group. The Groups with these three

items the same are considered to be the same. You can configure SNMP Group to control the

network access by providing the users in various groups with different management rights via the

Read View, Write View and Notify View.

3. Create SNMP User

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TP-LINK TL-SG2216 Manual

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