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Customizing DHCP ..................................................................................................1-7
Starting RARP Services .................................................................................................1-7
Enabling RARP on an Interface ...............................................................................1-7
Customizing RARP ..................................................................................................1-8
Chapter 2
SNMP, RMON, BOOTP, DHCP, and RARP Concepts
SNMP Overview .............................................................................................................2-1
SNMP Messages .....................................................................................................2-2
SNMP Communities .................................................................................................2-4
SNMP Implementation Notes .........................................................................................2-4
Internet Protocol (IP) ................................................................................................2-5
Events and Traps ......................................................................................................2-5
Protocol Entities .................................................................................................2-5
Severity Levels ...................................................................................................2-6
SNMP Trap Format ............................................................................................2-6
Thresholds ...............................................................................................................2-7
Threshold Example ..................................................................................................2-8
Event Message Format ......................................................................................2-9
State of a Threshold ..........................................................................................2-9
Memory Considerations .....................................................................................2-9
RMON Overview ...........................................................................................................2-10
How RMON Works .................................................................................................2-10
RMON Architecture ................................................................................................2-12
RMON MIB Groups ................................................................................................2-13
Statistics Group ...............................................................................................2-13
History Group ..................................................................................................2-14
Host Group ......................................................................................................2-14
HostTopN Group ..............................................................................................2-14
Matrix Group ....................................................................................................2-14
Filter Group ......................................................................................................2-14
Capture Group .................................................................................................2-15
Alarm Group ....................................................................................................2-15
Event Group .....................................................................................................2-16
RMON Interoperability Issues .......................................................................................2-17
RMON Applications ................................................................................................2-18
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