H3C Technologies H3C S10500 Series Switches User Manual
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IP address lease extension···································································································································· 29
DHCP message format··················································································································································· 30
DHCP options ································································································································································· 31
Overview································································································································································ 31
Introduction to DHCP options······························································································································· 31
Custom options ······················································································································································ 31
Protocols and standards ················································································································································ 34
DHCP server configuration········································································································································35
Introduction to DHCP server·········································································································································· 35
Application environment······································································································································· 35
DHCP address pool··············································································································································· 35
IP address allocation sequence···························································································································· 36
DHCP server configuration task list ······························································································································ 37
Configuring an address pool for the DHCP server····································································································· 37
Configuration task list ··········································································································································· 37
Creating a DHCP address pool··························································································································· 38
Configuring a domain name suffix for the client ······························································································· 41
Configuring DNS servers for the client ··············································································································· 41
Configuring BIMS server information for the client···························································································· 42
Configuring gateways for the client ···················································································································· 42
Configuring the TFTP server and bootfile name for the client··········································································· 43
Specifying a server’s IP address for the DHCP client ························································································ 44
Configuring self-defined DHCP options ·············································································································· 44
Enabling DHCP ······························································································································································ 45
Enabling the DHCP server on an interface·················································································································· 45
Applying an extended address pool on an interface ································································································ 46
Configuring the DHCP server security functions ········································································································· 47
Configuration prerequisites ·································································································································· 47
Enabling unauthorized DHCP server detection·································································································· 47
Configuring IP address conflict detection ··········································································································· 47
Enabling client offline detection ··································································································································· 48
Enabling handling of Option 82·································································································································· 48
Specifying the threshold for sending trap messages·································································································· 49
Configuration prerequisites ·································································································································· 49
Configuration procedure ······································································································································ 49
Displaying and maintaining the DHCP server ············································································································ 49
DHCP server configuration examples ·························································································································· 50
Static IP address assignment configuration example························································································· 50
Dynamic IP address assignment configuration example··················································································· 51
Self-defined option configuration example········································································································· 53
Troubleshooting DHCP server configuration ··············································································································· 54
DHCP relay agent configuration·······························································································································55
Introduction to DHCP relay agent ································································································································ 55
Application environment······································································································································· 55
Fundamentals························································································································································· 55
DHCP relay agent support for Option 82 ·········································································································· 56
DHCP relay agent configuration task list····················································································································· 57
Enabling DHCP ······························································································································································ 57
Enabling the DHCP relay agent on an interface ········································································································ 57