Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Manual do Utilizador descarregar pdf (Página 6)

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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Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Manual do Utilizador Página 6