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H3C Technologies H3C S12500 Series Switches User Manual

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IP address lease extension···································································································································· 26

 

DHCP message format ··················································································································································· 27

 

DHCP options ································································································································································· 28

 

DHCP options overview ········································································································································ 28

 

Introduction to DHCP options ······························································································································· 28

 

Self-defined options ··············································································································································· 29

 

Protocols and standards ················································································································································ 32

 

Configuring the DHCP server ···································································································································· 34

 

Overview ········································································································································································· 34

 

Application environment ······································································································································· 34

 

DHCP address pool ··············································································································································· 34

 

IP address allocation sequence ···························································································································· 35

 

DHCP server configuration task list ······························································································································ 36

 

Configuring an address pool for the DHCP server ····································································································· 36

 

Configuration task list ··········································································································································· 36

 

Creating a DHCP address pool ··························································································································· 37

 

Configuring address allocation mode for a common address pool ································································ 37

 

Configuring dynamic address allocation for an extended address pool ························································ 39

 

Configuring a domain name suffix for the client ······························································································· 40

 

Configuring DNS servers for the client ··············································································································· 40

 

Configuring WINS servers and NetBIOS node type for the client ·································································· 41

 

Configuring BIMS server information for the client ···························································································· 41

 

Configuring gateways for the client ···················································································································· 42

 

Configuring Option 184 parameters for the client with voice service ···························································· 42

 

Configuring the TFTP server and bootfile name for the client ··········································································· 43

 

Specifying a server's IP address for the DHCP client ························································································ 43

 

Configuring self-defined DHCP options ·············································································································· 44

 

Enabling DHCP ······························································································································································ 45

 

Enabling the DHCP server on an interface ·················································································································· 45

 

Applying an extended address pool on an interface ································································································ 45

 

Configuring the DHCP server security functions ········································································································· 46

 

Configuration prerequisites ·································································································································· 46

 

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

 

Configuring IP address conflict detection ··········································································································· 46

 

Configuring the DHCP server to support authorized ARP ················································································· 47

 

Enabling client offline detection ··································································································································· 48

 

Enabling Option 82 handling ······································································································································ 48

 

Configuration prerequisites ·································································································································· 48

 

Enabling Option 82 handling ······························································································································ 49

 

Specifying the threshold for sending trap messages ·································································································· 49

 

Configuration prerequisites ·································································································································· 49

 

Configuration procedure ······································································································································ 49

 

Displaying and maintaining the DHCP server ············································································································ 49

 

DHCP server configuration examples ·························································································································· 50

 

Static IP address assignment configuration example························································································· 51

 

Dynamic IP address assignment configuration example ··················································································· 52

 

Self-defined option configuration example ········································································································· 53

 

Troubleshooting DHCP server configuration ··············································································································· 54

 

Symptom ································································································································································· 54

 

Analysis ·································································································································································· 54

 

Solution ··································································································································································· 55

 

Configuring the DHCP relay agent ··························································································································· 56

 

Introduction to DHCP relay agent ································································································································ 56