1. Network Management
Computer Networks

2. OSI Network Management Model
Performance Management
e.g. utilization
Fault Management
e.g. SNMP traps
Configuration Management
e.g. configuration files
Accounting Management
e.g. chargeback systems
Security Management
e.g. access control

3. Components of a Network Management System
Manager
centralized
collects, controls, and reports
Managed entities
agent software
management information base (MIB)
Network management protocol

4. Simple Network Management Protocol
Most popular version is SNMPv1
SNMPv2 exists, but no one uses it
SNMPv3 enhances admin and security
SNMPv1 defined in RFC 1157
Two popular books
The Simple Book - M. Rose
SNMP, SNMPv2, SNMPv3 and RMON 1 and 2 - W. Stallings

5. Structure of Management Information (SMI)
Based on ASN.1
Defines information in managed entity
Integer32, Unsigned32
IPaddress
Counter32, Counter64
High level constructs

6. SMI Example ipInDelivers ObjectType SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of input datagrams successfully delivered to IP user-protocols (including ICMP).”
:: = ( ip 9 )

7. Management Information Base (MIB)
Stores information of managed entity
Values can be queried and often set using the network management protocol (SNMP)
Many standard MIBs and many more private MIBs
Objects arranged in MIB according to its Object ID (OID)

8. MIB Naming Format Uses ISO format Example Cisco’s MIB:
A Cisco MIB object:
device temperature

9. SNMP Protocol Operation
GetRequest
GetNextRequest
SetRequest
GetResponse
Trap
SNMPv2 adds functionality
e.g. GetBulkRequest

10. SNMP Message Format

11. Remote Network Monitoring (RMON)
RMON is a MIB for remote management of a network as opposed to a single managed entity
Probes collect and process information
Standard RMON groups
statistics, history, alarm, host, hostTopN, matrix, filter, packet capture, event

12. John’s Theory on Network Management
If you spend more time managing your network management system(s) than your actual production network, you’re doing something very wrong.