1. 1 SNMP Standard MIBs Mi-Jung Choi Dept. of Computer Science KNU Email: mjchoi@kangwon.ac.kr

2. 2 Table of Contents MIB-II

3. 3 Internet Full Standard (RFC 1213) a superset of MIB-I (RFC 1156) the most important and basic MIB specification, covering a broad range of managed objects consists of 10 groups of objects all objects in MIB-II are mandatory but only groups applicable to managed devices need to be implemented –e.g., bridge or router need not implement the tcp group –why not?

4. 4 MIB-II

5. 5 MIB-II Groups

6. 6 MIB-II System Group system (mib-2 1) sysDescr (1) sysObjectID (2) sysUpTime (3) sysContact (4) sysName (5) sysLocation (6) sysServices (7)

7. 7 System Group Objects

8. 8 sysServices Meanings Service Layer Value Application 7 64 Transport 4 8 Network 3 4 Data-link 2 2 Physical 1 1 Examples: repeater (physical device) = 1 bridge (data-link device) = 2 router (network device) = 2 + 4 = 6 W/S host = 64 + 8 = 72 PC = 64 + 8 + 4 = 76 printer = 64

9. 9 Case Diagram for MIB-II interfaces Group Upper layer Network ifInUcastPkts + ifInNUcastPkts ifInDiscards ifInUnKnownProtos ifInErrors ifInUcastPkts + ifInNUcastPkts ifOutErrors ifOutDiscards

10. 10 READING Read Chapter 6 Standard MIBs