H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 8)

iii
DHCP snooping configuration ·································································································································· 57
DHCP snooping overview ············································································································································· 57
Functions of DHCP snooping································································································································ 57
Application environment of trusted ports ············································································································ 58
DHCP snooping support for Option 82 ·············································································································· 59
Configuring DHCP snooping basic functions ·············································································································· 60
Configuring DHCP snooping to support Option 82 ··································································································· 61
Configuring DHCP snooping entries backup ·············································································································· 62
Enabling DHCP starvation attack protection ··············································································································· 63
Enabling DHCP-REQUEST message attack protection ······························································································· 64
Displaying and maintaining DHCP snooping ············································································································· 64
DHCP snooping configuration examples ····················································································································· 65
DHCP snooping configuration example ············································································································· 65
DHCP snooping Option 82 support configuration example ············································································ 65
BOOTP client configuration ······································································································································· 67
Introduction to BOOTP client ········································································································································ 67
BOOTP application ··············································································································································· 67
Obtaining an IP address dynamically ················································································································· 68
Protocols and standards ······································································································································· 68
Configuring an interface to dynamically obtain an IP address through BOOTP ···················································· 68
Displaying and maintaining BOOTP client configuration ·························································································· 68
BOOTP client configuration example ·························································································································· 69
IPv4 DNS configuration ············································································································································· 70
DNS overview ································································································································································ 70
Static domain name resolution ····························································································································· 70
Dynamic domain name resolution ······················································································································· 70
DNS proxy ····························································································································································· 72
DNS spoofing ························································································································································ 73
Configuring the IPv4 DNS client ·································································································································· 74
Configuring static domain name resolution ········································································································ 74
Configuring dynamic domain name resolution ·································································································· 74
Configuring the DNS proxy ·········································································································································· 75
Configuring DNS spoofing ··········································································································································· 75
Configuration prerequisites ·································································································································· 75
Configuration procedure ······································································································································ 76
Displaying and maintaining IPv4 DNS ························································································································ 76
IPv4 DNS configuration examples ······························································································································· 76
Static domain name resolution configuration example ····················································································· 76
Dynamic domain name resolution configuration example ··············································································· 77
DNS proxy configuration example ······················································································································ 80
Troubleshooting IPv4 DNS configuration ···················································································································· 82
IPv6 DNS configuration ············································································································································· 83
Introduction to IPv6 DNS ··············································································································································· 83
Configuring the IPv6 DNS client ·································································································································· 83
Configuring static domain name resolution ········································································································ 83
Configuring dynamic domain name resolution ·································································································· 84
Displaying and maintaining IPv6 DNS ························································································································ 84
IPv6 DNS configuration examples ······························································································································· 85
Static domain name resolution configuration example ····················································································· 85
Dynamic domain name resolution configuration example ··············································································· 86
IP performance optimization configuration ·············································································································· 91
Enabling receiving and forwarding of directed broadcasts to a directly connected network ······························· 91