H3C Technologies H3C S7500E Series Switches - Manual (Page 9)

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6 DHCP Relay Agent Configuration ············································································································6-1
Introduction to DHCP Relay Agent ·········································································································6-1
Application Environment··················································································································6-1
Fundamentals··································································································································6-1
DHCP Relay Agent Support for Option 82 ······················································································6-2
DHCP Relay Agent Configuration Task List ···························································································6-3
Configuring the DHCP Relay Agent········································································································6-4
Enabling DHCP ·······························································································································6-4
Enabling the DHCP Relay Agent on an Interface ···········································································6-4
Correlating a DHCP Server Group with a Relay Agent Interface····················································6-4
Configuring the DHCP Relay Agent Security Functions ·································································6-5
Configuring the DHCP Relay Agent to Send a DHCP-Release Request ·······································6-7
Configuring the DHCP Relay Agent to Support Option 82······························································6-8
Displaying and Maintaining DHCP Relay Agent Configuration ······························································6-9
DHCP Relay Agent Configuration Examples ························································································6-10
DHCP Relay Agent Configuration Example ··················································································6-10
DHCP Relay Agent Option 82 Support Configuration Example····················································6-11
Troubleshooting DHCP Relay Agent Configuration··············································································6-12
7 DHCP Client Configuration·······················································································································7-1
Introduction to DHCP Client····················································································································7-1
Enabling the DHCP Client on an Interface ·····························································································7-1
Displaying and Maintaining the DHCP Client ·························································································7-2
DHCP Client Configuration Example ······································································································7-2
8 DHCP Snooping Configuration ················································································································8-1
DHCP Snooping Overview······················································································································8-1
Functions of DHCP Snooping ·········································································································8-1
Application Environment of Trusted Ports ·······················································································8-2
DHCP Snooping Support for Option 82···························································································8-3
Configuring DHCP Snooping Basic Functions························································································8-4
Configuring DHCP Snooping to Support Option 82················································································8-5
Prerequisites····································································································································8-5
Configuring DHCP Snooping to Support Option 82 ········································································8-5
Displaying and Maintaining DHCP Snooping ·························································································8-7
DHCP Snooping Configuration Examples ······························································································8-8
DHCP Snooping Configuration Example·························································································8-8
DHCP Snooping Option 82 Support Configuration Example ··························································8-8
9 IPv4 DNS Configuration ····························································································································9-1
DNS Overview·········································································································································9-1
Static Domain Name Resolution ·····································································································9-1
Dynamic Domain Name Resolution ································································································9-1
DNS Proxy·······································································································································9-3
Configuring the IPv4 DNS Client·············································································································9-4
Configuring Static Domain Name Resolution ··················································································9-4
Configuring Dynamic Domain Name Resolution·············································································9-4