H3C SR8800-F Configuration Manual page 8

IP address allocation process ······························································································ 89
IP address lease extension ·································································································· 89
DHCP message format ············································································································· 90
DHCP options ························································································································· 91
Common DHCP options ············································································································ 91
Custom DHCP options ·············································································································· 91
Vendor-specific option (Option 43) ························································································ 92
Relay agent option (Option 82) ····························································································· 93
Option 184 ······················································································································· 93
Protocols and standards ············································································································ 94
Configuring the DHCP server ···························································· 95
About DHCP server ·················································································································· 95
DHCP address assignment mechanisms ················································································ 95
Principles for selecting an address pool·················································································· 96
IP address allocation sequence ···························································································· 97
DHCP server tasks at a glance ··································································································· 97
Creating a DHCP user class ······································································································· 98
Configuring an address pool on the DHCP server ··········································································· 98
DHCP address pool tasks at a glance ···················································································· 98
Creating a DHCP address pool ···························································································· 99
Specifying IP address ranges for a DHCP address pool ····························································· 99
Specifying gateways for DHCP clients ················································································· 102
Specifying a domain name suffix for DHCP clients ·································································· 102
Specifying DNS servers for DHCP clients ············································································· 103
Specifying WINS servers and NetBIOS node type for DHCP clients ··········································· 103
Specifying BIMS server for DHCP clients ·············································································· 103
Specifying the configuration file for DHCP client auto-configuration ············································ 104
Specifying a server for DHCP clients ··················································································· 105
Configuring Option 184 parameters for DHCP clients ······························································ 105
Customizing DHCP options ······························································································· 105
Configuring the DHCP user class whitelist ············································································ 107
Enabling DHCP ····················································································································· 107
Enabling the DHCP server on an interface ·················································································· 108
Applying a DHCP address pool to a VPN instance ········································································ 108
Applying an address pool on an interface ···················································································· 108
Configuring a DHCP policy for dynamic address assignment ··························································· 109
Allocating different IP addresses to DHCP clients with the same MAC ··············································· 110
Enabling random IP address allocation ······················································································· 110
Configuring IP address conflict detection ····················································································· 110
Enabling handling of Option 82 ································································································· 111
Disabling Option 60 encapsulation in DHCP replies ······································································· 111
Configuring the DHCP server security features ············································································· 112
Restrictions and guidelines ································································································ 112
Configuring DHCP flood attack protection ············································································· 112
Configuring DHCP starvation attack protection ······································································ 113
Configuring DHCP server compatibility ······················································································· 113
Configuring the DHCP server to always broadcast responses ··················································· 113
Enabling the DHCP server to return a DHCP-NAK message upon client notions of incorrect IP addresses
··································································································································· 114
Configure the DHCP server to ignore BOOTP requests ··························································· 114
Configuring the DHCP server to send BOOTP responses in RFC 1048 format ····························· 115
Setting the DSCP value for DHCP packets sent by the DHCP server ················································ 115
Configuring DHCP packet rate limit on a DHCP server interface ······················································ 115
Configuring DHCP binding auto backup ······················································································ 116
Binding gateways to DHCP server's MAC address ········································································ 116
Advertising subnets assigned to clients ······················································································· 117
Enabling client offline detection on the DHCP server ····································································· 118
Configuring SNMP notifications for the DHCP server ····································································· 118
Enabling DHCP logging on the DHCP server ··············································································· 119
Display and maintenance commands for DHCP server ·································································· 119
DHCP server configuration examples ························································································· 120
iii