H3C Technologies H3C S12500 Series Switches User Manual
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DHCP overview ·························································································································································· 22
DHCP address allocation ·············································································································································· 22
Allocation mechanisms ········································································································································· 22
Dynamic IP address allocation process··············································································································· 23
IP address lease extension···································································································································· 23
DHCP message format ··················································································································································· 24
DHCP options ································································································································································· 25
Common DHCP options ········································································································································ 25
Custom DHCP options ··········································································································································· 25
Protocols and standards ················································································································································ 27
Configuring the DHCP server ···································································································································· 29
Overview ········································································································································································· 29
DHCP address pool ··············································································································································· 29
IP address allocation sequence ···························································································································· 31
DHCP server configuration task list ······························································································································ 31
Configuring an address pool on the DHCP server ····································································································· 31
Configuration task list ··········································································································································· 31
Creating a DHCP address pool ··························································································································· 32
Specifying IP address ranges for a DHCP address pool ·················································································· 32
Configuring gateways for the client ···················································································································· 35
Configuring a domain name suffix for the client ······························································································· 36
Configuring DNS servers for the client ··············································································································· 36
Configuring WINS servers and NetBIOS node type for the client ·································································· 37
Configuring BIMS server information for the client ···························································································· 37
Configuring the TFTP server and boot file name for the client ········································································· 38
Specifying a server for the DHCP client ·············································································································· 38
Configuring Option 184 parameters for the client ···························································································· 39
Configuring self-defined DHCP options ·············································································································· 39
Enabling DHCP ······························································································································································ 40
Enabling the DHCP server on an interface ·················································································································· 40
Applying an address pool on an interface ················································································································· 41
Configuring IP address conflict detection ···················································································································· 41
Enabling handling of Option 82 ·································································································································· 41
Configuring DHCP server compatibility ······················································································································· 42
Configuring the DHCP server to broadcast all responses ················································································· 42
Configure the DHCP server to ignore BOOTP requests ···················································································· 42
Configuring the DHCP server to send BOOTP responses in the format specified in RFC 1048 ·················· 43
Displaying and maintaining the DHCP server ············································································································ 43
DHCP server configuration examples ·························································································································· 44
Static IP address assignment configuration example························································································· 44
Dynamic IP address assignment configuration example ··················································································· 45
DHCP user class configuration example ············································································································· 47
Self-defined option configuration example ········································································································· 48
Troubleshooting DHCP server configuration ··············································································································· 49
Symptom ································································································································································· 49
Analysis ·································································································································································· 49
Solution ··································································································································································· 49
Configuring the DHCP relay agent ··························································································································· 50
Overview ········································································································································································· 50
Operation ······························································································································································· 50
DHCP relay agent support for Option 82 ·········································································································· 51
DHCP relay agent configuration task list ····················································································································· 51
Enabling DHCP ······························································································································································ 52