Operation Manual – SNMP and RMON 
Quidway S3900 Series Ethernet Switches-Release 1510  Chapter 1  SNMP Configuration
 
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1-2 
name can limit access to SNMP Agent from SNMP NMS, functioning as a password. 
You can define the following features related to the community name. 
z  Define MIB view that a community can access. 
z  Set read-only or read-write right to access MIB objects for the community. The 
read-only community can only query device information, while the read-write 
community can configure the device. 
z  Set the basic ACL specified by the community name.  
1.1.3  MIBs Supported by the Device 
The management variable in the SNMP packet is used to describe management 
objects of a device. To uniquely identify the management objects of the device in SNMP 
messages, SNMP adopts the hierarchical naming scheme to identify the managed 
objects. It is like a tree, and each tree node represents a managed object, as shown in 
Figure 1-1. Thus the object can be identified with the unique path starting from the root. 
A
2
6
1
5
2
1
1
2
1
B
 
Figure 1-1 Architecture of the MIB tree 
The management information base (MIB) is used to describe the hierarchical 
architecture of the tree and it is the set defined by the standard variables of the 
monitored network device. In the above figure, the managed object B can be uniquely 
specified by a string of numbers {1.2.1.1}. The number string is the Object Identifier of 
the managed object. 
The common MIBs supported by the system are listed in 
Table 1-1.