352 CHAPTER 33: SNMP CONFIGURATIONinformation, while those with read-write permission can configure the switchas well.■ Set the basic ACL specified by the community name.Supported MIBs An SNMP packet carries management variables with it. Management variable isused to describe the management objects of a switch. To uniquely identify themanagement objects of the switch, SNMP adopts a hierarchical naming scheme toorganize the managed objects. It is like a tree, with each tree node representing amanaged object, as shown in Figure 106. Each node in this tree can be uniquelyidentified by a path starting from the root.Figure 106 Architecture of the MIB treeThe management information base (MIB) describes the hierarchical architecture ofthe tree and it is the set defined by the standard variables of the monitorednetwork devices. In the above figure, the managed object B can be uniquelyidentified by a string of numbers {1.2.1.1}. The number string is the objectidentifier (OID) of the managed object.The common MIBs supported by switches are listed in Table 272.Table 272 Common MIBsMIB attribute MIB content Related RFCPublic MIB MIB II based on TCP/IPnetwork deviceRFC 1213BRIDGE MIB RFC 1493RFC 2675RIP MIB RFC 1724RMON MIB RFC 2819Ethernet MIB RFC 2665OSPF MIB RFC 1253IF MIB RFC 1573A261521121B
