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Restoring a startup configuration file ························································································································· 239
Displaying and maintaining a configuration file ······································································································ 240
Software upgrade configuration ···························································································································· 241
Device software overview ··········································································································································· 241
Software upgrade methods ········································································································································· 242
Software upgrade through a system reboot ·············································································································· 242
Upgrading the Boot ROM program through a system reboot ········································································ 242
Upgrading the boot file through a system reboot ···························································································· 243
Software upgrade by installing hotfixes ···················································································································· 243
Basic concepts in hotfix ······································································································································ 243
Patch status ··························································································································································· 244
Hotfix configuration task list ······························································································································· 246
Configuration prerequisites ································································································································ 247
One-step patch installation ································································································································· 247
Step-by-step patch installation ···························································································································· 247
Step-by-step patch uninstallation ························································································································ 249
Displaying and maintaining software upgrade ········································································································ 250
Software upgrade configuration examples ··············································································································· 250
Scheduled upgrade configuration example ····································································································· 250
Hotfix configuration example ····························································································································· 252
System maintenance and debugging ···················································································································· 253
Ping ················································································································································································ 253
Introduction ·························································································································································· 253
Configuring ping ················································································································································· 253
Tracert ··········································································································································································· 254
Introduction ·························································································································································· 254
Configuring tracert ·············································································································································· 254
System debugging ······················································································································································· 255
Introduction to system debugging ······················································································································ 255
Configuring system debugging ·························································································································· 255
Ping and tracert configuration example ···················································································································· 256
Information center configuration ···························································································································· 258
Information center overview ········································································································································ 258
Introduction to information center ······················································································································ 258
Classification of system information ·················································································································· 259
Eight levels of system information ······················································································································ 259
Eight output destinations and ten channels of system information ································································· 260
Outputting system information by source module ···························································································· 261
Default output rules of system information ········································································································ 261
System information format ·································································································································· 262
Configuring information center ··································································································································· 265
Information center configuration task list ·········································································································· 265
Outputting system information to the console ·································································································· 265
Outputting system information to a monitor terminal ······················································································ 266
Outputting system information to a log host ····································································································· 267
Outputting system information to the trap buffer······························································································ 268
Outputting system information to the log buffer ······························································································· 269
Outputting system information to the SNMP module ······················································································· 270
Outputting system information to the web interface ························································································ 270
Saving system information to a log file ············································································································· 271
Managing security logs files ······························································································································ 272
Configuring synchronous information output ··································································································· 273
Disabling a port from generating link up/down logging information ··························································· 274
