280
C
HAPTER
19: P
ROBLEM
S
OLVING
If the NTP server is not functional, or you are not confident it is
working correctly, try using another NTP server.
■
If NTP is enabled and operational, check that traffic on TCP port 123 is
not blocked by a Firewall between the Webcache and the NTP server.
■
The timezone is set correctly.
Alternatively, the Webcache system time can be set manually. If you have
configured the system time manually and it is inaccurate, the Webcache
clock has probably drifted over time. 3Com recommends that you use the
Network Time Protocol to prevent this. If this is not possible, reset the
system time manually using the Time Configuration screen. Also check
that the timezone is set correctly.
Software upgrade detection has failed
You must ensure that FTP requests are not blocked by a Firewall on TCP
ports 20 and 21. Upgrade detection will fail if your Firewall blocks FTP
requests. A “Software Upgrade Download Failed“ SNMP trap and e-mail
notification will be issued (if configured) to inform you of the failure; for
further information, see
“Automatic System Events”
on
page 214
.
Solving Command
Line Interface
Problems
The Command Line Interface responds slowly to commands.
This is probably due to large amounts of traffic on the network. Logout
and then login again later when the amount of traffic to the Webcache is
less.
You forget the password for the
admin
user name and can no
longer perform important management operations.
Use the password recovery method outlined on
page 107
to define a new
password for the admin user name.
Solving Webcache
Performance
Problems
The performance of the Webcache is poor
Check:
■
Whether any of the cache storage devices have failed. Examine the
front panel LEDs to ensure there are no faults found. If there are, enter
this URL into your Internet browser:
http://knowledgebase.3com.com/division/publisher.asp?id=2.
0.77094716.3290900
(correct at time of publication)
dua1611-5aaa04.book Page 280 Friday, November 29, 2002 8:56 PM
Содержание SuperStack 3 WEBCACHE 1000
Страница 16: ...dua1611 5aaa04 book Page 16 Friday November 29 2002 8 56 PM ...
Страница 22: ...22 dua1611 5aaa04 book Page 22 Friday November 29 2002 8 56 PM ...
Страница 58: ...58 CHAPTER 1 WEB CACHING CONCEPTS AND DEPLOYMENT dua1611 5aaa04 book Page 58 Friday November 29 2002 8 56 PM ...
Страница 78: ...78 CHAPTER 2 INSTALLING THE WEBCACHE dua1611 5aaa04 book Page 78 Friday November 29 2002 8 56 PM ...
Страница 80: ...80 dua1611 5aaa04 book Page 80 Friday November 29 2002 8 56 PM ...
Страница 102: ...102 CHAPTER 4 USING THE WEB INTERFACE dua1611 5aaa04 book Page 102 Friday November 29 2002 8 56 PM ...
Страница 110: ...110 dua1611 5aaa04 book Page 110 Friday November 29 2002 8 56 PM ...
Страница 126: ...126 CHAPTER 6 CONFIGURING DEPLOYMENT MODES dua1611 5aaa04 book Page 126 Friday November 29 2002 8 56 PM ...
Страница 136: ...136 CHAPTER 8 SYSTEM TIME dua1611 5aaa04 book Page 136 Friday November 29 2002 8 56 PM ...
Страница 138: ...138 dua1611 5aaa04 book Page 138 Friday November 29 2002 8 56 PM ...
Страница 144: ...144 CHAPTER 9 MONITORING WEB ACCESS dua1611 5aaa04 book Page 144 Friday November 29 2002 8 56 PM ...
Страница 178: ...178 CHAPTER 10 USING CONTENT FILTERING dua1611 5aaa04 book Page 178 Friday November 29 2002 8 56 PM ...
Страница 180: ...180 dua1611 5aaa04 book Page 180 Friday November 29 2002 8 56 PM ...
Страница 192: ...192 CHAPTER 11 CONTROLLING HOW WEB SITES ARE CACHED dua1611 5aaa04 book Page 192 Friday November 29 2002 8 56 PM ...
Страница 204: ...204 CHAPTER 12 PRELOADING CONTENT dua1611 5aaa04 book Page 204 Friday November 29 2002 8 56 PM ...
Страница 206: ...206 dua1611 5aaa04 book Page 206 Friday November 29 2002 8 56 PM ...
Страница 218: ...218 CHAPTER 13 MONITORING SYSTEM EVENTS dua1611 5aaa04 book Page 218 Friday November 29 2002 8 56 PM ...
Страница 234: ...234 dua1611 5aaa04 book Page 234 Friday November 29 2002 8 56 PM ...
Страница 248: ...248 CHAPTER 17 SOFTWARE UPGRADES dua1611 5aaa04 book Page 248 Friday November 29 2002 8 56 PM ...
Страница 250: ...250 dua1611 5aaa04 book Page 250 Friday November 29 2002 8 56 PM ...
Страница 272: ...272 CHAPTER 18 COMMAND LINE INTERFACE dua1611 5aaa04 book Page 272 Friday November 29 2002 8 56 PM ...
Страница 273: ...IX PROBLEM SOLVING Chapter 19 Problem Solving dua1611 5aaa04 book Page 273 Friday November 29 2002 8 56 PM ...
Страница 274: ...274 dua1611 5aaa04 book Page 274 Friday November 29 2002 8 56 PM ...
Страница 286: ...286 dua1611 5aaa04 book Page 286 Friday November 29 2002 8 56 PM ...
Страница 294: ...294 APPENDIX A SAFETY INFORMATION dua1611 5aaa04 book Page 294 Friday November 29 2002 8 56 PM ...
Страница 298: ...298 APPENDIX B CABLE SPECIFICATIONS AND PIN OUTS dua1611 5aaa04 book Page 298 Friday November 29 2002 8 56 PM ...
Страница 312: ...312 APPENDIX E DEFAULT SETTINGS FOR THE WEBCACHE dua1611 5aaa04 book Page 312 Friday November 29 2002 8 56 PM ...
Страница 334: ...334 APPENDIX I TRACE ROUTE SYMBOLS dua1611 5aaa04 book Page 334 Friday November 29 2002 8 56 PM ...
Страница 348: ...348 GLOSSARY dua1611 5aaa04 book Page 348 Friday November 29 2002 8 56 PM ...