3Com S7906E Configuration Manual page 384

1 DHCP Overview··········································································································································1-1
Introduction to DHCP ······························································································································1-1
DHCP Address Allocation ·······················································································································1-2
Allocation Mechanisms····················································································································1-2
Dynamic IP Address Allocation Process ·························································································1-2
IP Address Lease Extension ···········································································································1-3
DHCP Message Format ··························································································································1-3
DHCP Options·········································································································································1-4
DHCP Options Overview ·················································································································1-4
Introduction to DHCP Options ·········································································································1-4
Self-Defined Options ·······················································································································1-5
Protocols and Standards·························································································································1-8
2 DHCP Server Configuration······················································································································2-1
Introduction to DHCP Server ··················································································································2-1
Application Environment··················································································································2-1
DHCP Address Pool ························································································································2-2
IP Address Allocation Sequence ·····································································································2-3
DHCP Server Configuration Task List ····································································································2-3
Configuring an Address Pool for the DHCP Server ················································································2-4
Configuration Task List····················································································································2-4
Creating a DHCP Address Pool ······································································································2-4
Configuring an Address Allocation Mode for a Common Address Pool··········································2-5
Configuring Dynamic Address Allocation for an Extended Address Pool ·······································2-7
Configuring a Domain Name Suffix for the Client ···········································································2-8
Configuring DNS Servers for the Client···························································································2-8
Configuring WINS Servers and NetBIOS Node Type for the Client················································2-8
Configuring the BIMS Server Information for the Client ··································································2-9
Configuring Gateways for the Client································································································2-9
Configuring Option 184 Parameters for the Client with Voice Service··········································2-10
Configuring the TFTP Server and Bootfile Name for the Client ····················································2-10
Configuring Self-Defined DHCP Options·······················································································2-11
Enabling DHCP ·····································································································································2-12
Enabling the DHCP Server on an Interface ··························································································2-12
Applying an Extended Address Pool on an Interface ···········································································2-13
Configuring the DHCP Server Security Functions ················································································2-13
Configuration Prerequisites ···········································································································2-14
Enabling Unauthorized DHCP Server Detection···········································································2-14
Configuring IP Address Conflict Detection ····················································································2-14
Configuring the Handling Mode for Option 82 ······················································································2-15
Displaying and Maintaining the DHCP Server ······················································································2-15
DHCP Server Configuration Examples ·································································································2-16
Static IP Address Assignment Configuration Example ·································································2-16
Dynamic IP Address Assignment Configuration Example ····························································2-18
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