3com WX3000 Manuel D’Utilisation

 

1-2 

SNMP NMS and SNMP agent. Community name functions as password. It can limit accesses made by 

SNMP NMS to SNMP agent. You can perform the following community name-related configuration. 

z 

Specifying MIB view that a community can access. 

z 

Set the permission for a community to access an MIB object to be read-only or read-write. 

Communities with read-only permissions can only query the device information, while those with 

read-write permission can configure the device as well. 

z 

Set the basic ACL specified by the community name.  

An SNMP packet carries management variables with it. Management variable is used to describe the 

management objects of the device. To uniquely identify the management objects of the device, SNMP 

adopts a hierarchical naming scheme to organize the managed objects. It is like a tree, with each tree 

node representing a managed object, as shown in 

. Each node in this tree can be uniquely 

identified by a path starting from the root. 

Figure 1-1 Architecture of the MIB tree 

A

2

6

1

5

2

1

1

2

1

B

 

 

The management information base (MIB) describes the hierarchical architecture of the tree and it is the 

set defined by the standard variables of the monitored network devices. In the above figure, the 

managed object B can be uniquely identified by a string of numbers {1.2.1.1}. The number string is the 

object identifier (OID) of the managed object. 

The common MIBs supported by devices are listed in 

. 

Table 1-1 Common MIBs 

 MIB II based on TCP/IP network device

RFC 1213 

RFC 1493 

BRIDGE MIB 

RFC 2675 

RIP MIB 

RFC 1724 

RMON MIB 

RFC 2819 

Ethernet MIB 

RFC 2665 

OSPF MIB 

RFC 1253 

Public MIB 

IF MIB 

RFC 1573