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H3C Technologies H3C WX3000E Series Wireless Switches User Manual

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Configuring dynamic address allocation for an extended address pool ························································ 26

Configuring a domain name suffix for the client ······························································································· 27

Configuring DNS servers for the client ··············································································································· 27

Configuring WINS servers and NetBIOS node type for the client ·································································· 28

Configuring BIMS server information for the client ···························································································· 28

Configuring gateways for the client ···················································································································· 29

Configuring Option 184 parameters for the client with voice service ···························································· 29

Configuring the TFTP server and bootfile name for the client ··········································································· 30

Configuring self-defined DHCP options ·············································································································· 30

Enabling DHCP ······························································································································································ 31

Enabling the DHCP server on an interface ·················································································································· 32

Applying an extended address pool on an interface ································································································ 32

Configuring the DHCP server security functions ········································································································· 33

Configuration prerequisites ·································································································································· 33

Enabling unauthorized DHCP server detection ·································································································· 33

Configuring IP address conflict detection ··········································································································· 33

Enabling handling of Option 82 ·································································································································· 34

Specifying the threshold for sending trap messages ·································································································· 34

Configuration prerequisites ·································································································································· 34

Configuration procedure ······································································································································ 35

Displaying and maintaining the DHCP server ············································································································ 35

DHCP server configuration examples ·························································································································· 36

Static IP address assignment configuration example························································································· 36

Dynamic IP address assignment configuration example ··················································································· 37

Self-defined option configuration example ········································································································· 39

Troubleshooting DHCP server configuration ··············································································································· 39

DHCP relay agent configuration ······························································································································· 41

Introduction to DHCP relay agent ································································································································ 41

Application environment ······································································································································· 41

Fundamentals ························································································································································· 41

DHCP relay agent support for Option 82 ·········································································································· 42

DHCP relay agent configuration task list ····················································································································· 43

Enabling DHCP ······························································································································································ 43

Enabling the DHCP relay agent on an interface ········································································································ 43

Correlating a DHCP server group with a relay agent interface················································································ 44

Configuring the DHCP relay agent security functions ································································································ 45

Configure address check ······································································································································ 45

Configuring periodic refresh of dynamic client entries ····················································································· 45

Enabling unauthorized DHCP server detection ·································································································· 46

Enabling DHCP starvation attack protection ······································································································ 46

Enabling offline detection ·············································································································································· 47

Configuring the DHCP relay agent to release an IP address ···················································································· 47

Configuring the DHCP relay agent to support Option 82 ························································································· 48

Displaying and maintaining the DHCP relay agent ··································································································· 49

DHCP relay agent configuration examples ················································································································· 50

DHCP relay agent configuration example ·········································································································· 50

DHCP relay agent Option 82 support configuration example ········································································· 51

Troubleshooting DHCP relay agent configuration ······································································································ 52

DHCP client configuration ········································································································································· 53

Introduction to DHCP client ··········································································································································· 53

Enabling the DHCP client on an interface ··················································································································· 53

Displaying and maintaining the DHCP client ·············································································································· 54

DHCP client configuration example ····························································································································· 54