Enabling IGMP snooping globally··························································································································255 Configuring IGMP snooping in a VLAN ················································································································256
Configuring IGMP snooping port functions ···········································································································257
Display IGMP snooping multicast entry information ·····························································································258
IGMP snooping configuration example························································································································259
Routing configuration·············································································································································· 266
Routing table ·····························································································································································266
Static route·································································································································································266
Default route ······························································································································································267
Configuring IPv4 routing················································································································································267
Displaying the IPv4 active route table ····················································································································267
Creating an IPv4 static route ···································································································································268
Static route configuration example ·······························································································································269
Precautions ······································································································································································273
DHCP overview ······················································································································································· 274
Introduction to DHCP······················································································································································274
DHCP address allocation···············································································································································274 Allocation mechanisms·············································································································································274
Dynamic IP address allocation process··················································································································275
IP address lease extension·······································································································································275
DHCP message format ···················································································································································276
DHCP options··································································································································································277
DHCP options overview ···········································································································································277
Introduction to DHCP options ··································································································································277
Introduction to Option 82 ········································································································································277
Protocols and standards·················································································································································278
DHCP relay agent configuration···························································································································· 279
Introduction to DHCP relay agent ·································································································································279
Application environment ··········································································································································279
Fundamentals ····························································································································································279
DHCP relay agent configuration task list······················································································································280
Enabling DHCP and configuring advanced parameters for the DHCP relay agent················································281 Creating a DHCP server group ·····································································································································282
Enabling the DHCP relay agent on an interface ·········································································································283
Configuring and displaying clients'
DHCP relay agent configuration example ···················································································································285
DHCP snooping configuration ······························································································································· 288
DHCP snooping overview··············································································································································288 Functions of DHCP snooping···································································································································288
Application environment of trusted ports················································································································289
DHCP snooping support for Option 82 ·················································································································290
DHCP snooping configuration task list ·························································································································290
Enabling DHCP snooping ··············································································································································291
Configuring DHCP snooping functions on an interface······························································································293
Displaying clients'
Service management configuration ······················································································································· 299
Configuring service management ·································································································································300
Diagnostic tools······················································································································································· 302
Ping ············································································································································································302
8