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Routing configuration ·············································································································································· 259
Routing table ························································································································································ 259
Static route ··························································································································································· 259
Default route ························································································································································· 260
Configuring IPv4 routing ············································································································································· 260
Displaying the IPv4 active route table ··············································································································· 260
Creating an IPv4 static route ······························································································································ 261
Static route configuration example ···························································································································· 262
Precautions ···································································································································································· 266
DHCP overview ······················································································································································· 267
Introduction to DHCP ··················································································································································· 267
DHCP address allocation ············································································································································ 267
Allocation mechanisms ······································································································································· 267
Dynamic IP address allocation process············································································································· 268
IP address lease extension·································································································································· 268
DHCP message format ················································································································································· 269
DHCP options ······························································································································································· 270
DHCP options overview ······································································································································ 270
Introduction to DHCP options ····························································································································· 270
Introduction to Option 82 ··································································································································· 270
Protocols and standards ·············································································································································· 271
DHCP relay agent configuration ···························································································································· 272
Introduction to DHCP relay agent ······························································································································ 272
Application environment ····································································································································· 272
Fundamentals ······················································································································································· 272
DHCP relay agent configuration task list ··················································································································· 273
Enabling DHCP and configuring advanced parameters for the DHCP relay agent ············································· 274
Creating a DHCP server group ·································································································································· 275
Enabling the DHCP relay agent on an interface ······································································································ 276
Configuring and displaying clients' IP-to-MAC bindings ························································································· 277
DHCP relay agent configuration example ················································································································· 277
DHCP snooping configuration ······························································································································· 281
DHCP snooping overview ··········································································································································· 281
Functions of DHCP snooping······························································································································ 281
Application environment of trusted ports ·········································································································· 282
DHCP snooping support for Option 82 ············································································································ 283
DHCP snooping configuration task list ······················································································································ 283
Enabling DHCP snooping ··········································································································································· 284
Configuring DHCP snooping functions on an interface ··························································································· 285
Displaying clients' IP-to-MAC bindings ······················································································································ 285
DHCP snooping configuration example ···················································································································· 286
Service management configuration ······················································································································· 291
Configuring service management ······························································································································ 292
Diagnostic tools ······················································································································································· 294
Ping ······································································································································································· 294
Trace route ··························································································································································· 294
Diagnostic tool operations ·········································································································································· 295
Ping operation ····················································································································································· 295
Trace route operation·········································································································································· 296
ARP management ···················································································································································· 298
ARP overview ································································································································································ 298
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