iii
Displaying and Maintaining DHCP Relay Agent Configuration ······························································6-9
DHCP Relay Agent Configuration Examples··························································································6-9
DHCP Relay Agent Configuration Example ····················································································6-9
DHCP Relay Agent Option 82 Support Configuration Example····················································6-10
Troubleshooting DHCP Relay Agent Configuration··············································································6-11
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
Function 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 ······························································································8-7
DHCP Snooping Configuration Example·························································································8-7
DHCP Snooping Option 82 Support Configuration Example ··························································8-8
9 BOOTP Client Configuration ····················································································································9-1
Introduction to BOOTP Client ·················································································································9-1
BOOTP Application ·························································································································9-1
Obtaining an IP Address Dynamically·····························································································9-2
Protocols and Standards ·················································································································9-2
Configuring an Interface to Dynamically Obtain an IP Address Through BOOTP ·································9-2
Displaying and Maintaining BOOTP Client Configuration·······································································9-3
BOOTP Client Configuration Example····································································································9-3
10 DNS Configuration·································································································································10-1
DNS Overview·······································································································································10-1
Static Domain Name Resolution ···································································································10-1
Dynamic Domain Name Resolution ······························································································10-1
DNS Proxy·····································································································································10-3
Configuring the DNS Client···················································································································10-4
Configuring Static Domain Name Resolution················································································10-4
Configuring Dynamic Domain Name Resolution···········································································10-4
Configuring the DNS Proxy···················································································································10-5
Displaying and Maintaining DNS ··········································································································10-5
DNS Configuration Examples ···············································································································10-5
Static Domain Name Resolution Configuration Example······························································10-5
Dynamic Domain Name Resolution Configuration Example·························································10-6
DNS Proxy Configuration Example ·······························································································10-9
Troubleshooting DNS Configuration ···································································································10-10
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