HP 10500 Series Configuration Manual page 5

Static IP address assignment configuration example ························································································ 51
Dynamic IP address assignment configuration example ··················································································· 53
Self-defined option configuration example ········································································································· 54
Troubleshooting DHCP server configuration ··············································································································· 55
Configuring the DHCP relay agent ··························································································································· 56
Overview········································································································································································· 56
Fundamentals ························································································································································· 56
DHCP relay agent support for Option 82 ·········································································································· 57
DHCP relay agent configuration task list ····················································································································· 58
Enabling DHCP ······························································································································································ 58
Enabling the DHCP relay agent on an interface ········································································································ 58
Correlating a DHCP server group with a relay agent interface ··············································································· 59
Configuration guidelines ······································································································································ 59
Configuration procedure ······································································································································ 59
Configuring the DHCP relay agent security functions ································································································ 60
Configuring address check ·································································································································· 60
Configuring periodic refresh of dynamic client entries ····················································································· 60
Enabling unauthorized DHCP server detection ·································································································· 61
Enabling DHCP starvation attack protection ······································································································ 61
Enabling client offline detection ··································································································································· 62
Configuring the DHCP relay agent to release an IP address ···················································································· 62
Configuring the DHCP relay agent to handle Option 82 ·························································································· 63
Configuration prerequisites ·································································································································· 63
Configuration procedure ······································································································································ 63
Setting the DSCP value for DHCP packets ·················································································································· 64
Displaying and maintaining the DHCP relay agent ··································································································· 64
DHCP relay agent configuration examples ················································································································· 65
DHCP relay agent configuration example ·········································································································· 65
DHCP relay agent Option 82 support configuration example ········································································· 66
Troubleshooting DHCP relay agent configuration ······································································································ 67
Configuring DHCP client ··········································································································································· 68
Configuration restrictions ·············································································································································· 68
Enabling the DHCP client on an interface ··················································································································· 68
Setting the DSCP value for DHCP packets ·················································································································· 68
Displaying and maintaining the DHCP client ·············································································································· 69
DHCP client configuration example ····························································································································· 69
Network requirements ··········································································································································· 69
Configuration procedure ······································································································································ 69
Verifying the configuration ··································································································································· 70
Configuring DHCP snooping ····································································································································· 72
DHCP snooping functions·············································································································································· 72
Guaranteeing that DHCP clients obtain IP addresses from authorized DHCP servers ·································· 72
Recording IP-to-MAC mappings of DHCP clients ······························································································· 72
Application environment of trusted ports ····················································································································· 73
Configuring a trusted port connected to a DHCP server··················································································· 73
Configuring trusted ports in a cascaded network ······························································································ 73
DHCP snooping support for Option 82 ······················································································································· 74
DHCP snooping configuration task list ························································································································ 75
Configuring DHCP snooping basic functions ·············································································································· 75
Configuration guidelines ······································································································································ 75
Configuration procedure ······································································································································ 76
Configuring DHCP snooping to support Option 82··································································································· 76
Configuration guidelines ······································································································································ 76
Configuration procedure ······································································································································ 77
iii