Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Manual de usuario Pagina 6

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117362-C Rev 00
Chapter 2
SNMP, BootP, BootP/DHCP Relay, DHCP Server, and RARP Concepts
SNMP Overview .............................................................................................................2-1
SNMP Messages .....................................................................................................2-2
SNMP Communities .................................................................................................2-3
SNMP Implementation Notes .........................................................................................2-4
Internet Protocol .......................................................................................................2-4
Events and Traps ......................................................................................................2-4
Protocol Entities .................................................................................................2-5
Severity Levels ...................................................................................................2-5
SNMP Trap Format ............................................................................................2-6
Thresholds ...............................................................................................................2-7
Threshold Example ..................................................................................................2-8
Event Message Format ......................................................................................2-8
State of a Threshold ..........................................................................................2-9
Memory Considerations .....................................................................................2-9
BootP Relay Agent Overview .......................................................................................2-10
DHCP Overview ...........................................................................................................2-14
Why Use DHCP? ...................................................................................................2-14
Dynamic IP Address Allocation ..............................................................................2-15
DHCP Components ................................................................................................2-16
DHCP Clients ..................................................................................................2-16
DHCP Server ...................................................................................................2-16
NetID Server Manager .....................................................................................2-16
BootP/DHCP Relay Implementation ......................................................................2-17
DHCP Server Implementation ................................................................................2-18
Acquiring an IP Address from a Router Configured as a BootP Relay Agent ........2-19
Identifying DHCP Servers ................................................................................2-20
Requesting and Receiving IP Information .......................................................2-23
Accepting or Declining IP Information .............................................................2-24
How Clients Acquire IP Addresses Using a DHCP Server ....................................2-24
Identifying DHCP Servers ................................................................................2-25
Requesting and Receiving IP Information .......................................................2-26
Accepting or Declining IP Information .............................................................2-27
Acquiring the Same IP Address Again ...................................................................2-27
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