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Contents vii
G
Example filters................................................13-147
RADIUS Client Support..............................................13-151
RADIUS client configuration..............................13-151
Chapter 14 — Utilities and Diagnostics ...............................14-155
Ping.........................................................................14-156
Trace Route..............................................................14-158
Telnet client..............................................................14-159
Disconnect Telnet console session ............................14-160
Factory defaults........................................................14-160
Transferring configuration and firmware files
with TFTP .................................................................14-160
Updating firmware ...........................................14-161
Downloading configuration files ........................14-162
Uploading configuration files ............................14-163
Transferring configuration and firmware files
with XMODEM...........................................................14-163
Updating firmware ...........................................14-164
Downloading configuration files ........................14-165
Uploading configuration files ............................14-165
Restarting the system...............................................14-166
Appendix A — Troubleshooting..............................................A-167
Configuration problems ...............................................A-167
Console connection problems ............................A-168
Network problems .............................................A-168
How to reset the router to factory defaults ...................A-169
Power outages............................................................ A-169
Technical support .......................................................A-170
How to reach us................................................A-170
Appendix B — Understanding IP Addressing ..........................B-173
What is IP?.................................................................B-173
About IP addressing....................................................B-173
Subnets and subnet masks ...............................B-174
Example: Using subnets on a Class C
IP internet ........................................................B-175