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Task 4Using Syslog, NTP, and Modem Call Records to Isolate and Troubleshoot Faults
About Modem Call Records
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Basic Dial NMS Implementation Guide
Inspecting Syslog Messages in t he Log File
To inspect syslog messages by using Cisco IOS commands, Unix commands, FTP, and a web browser,
follow these steps:
Step 1
From the Cisco IOS device, create basic syslog messages by entering these commands:
travis-nas-01#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
travis-nas-01(config)#^Z
travis-nas-01#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
travis-nas-01(config)#^Z
travis-nas-01#
Step 2
From the syslog server, verify that the syslog messages went in to the log file. Enter the
tail -f
command
to monitor the last 10 lines of an active log file. To exit tail -f mode, press
Ctrl-C
.
aurora:/etc ->tail -f /var/log/router.log
May 26 17:43:12 [172.21.101.20.6.122] 629: May 26 20:35:23.551 CST: %SYS-5-CONFIG_I:
Configured from console by vty0 (172.22.61.200)
May 26 17:51:15 [172.21.101.20.6.122] 630: May 26 20:43:27.068 CST: %SYS-5-CONFIG_I:
Configured from console by console
May 26 17:51:19 [172.21.101.20.6.122] 631: May 26 20:43:30.932 CST: %SYS-5-CONFIG_I:
Configured from console by console
May 26 17:54:38 [172.21.101.20.6.122] 632: May 26 20:46:50.344 CST: %SYS-5-CONFIG_I:
Configured from console by vty0 (172.22.61.200)
^C
aurora:/etc ->
Step 3
View the syslog messages in a web browser. Notice the wide horizontal scroll bar, which is helpful for
viewing debug messages and modem call records.
Figure 18 Syslog Messages that Appear by Using FTP and a Web Browser
ftp://sam@172.23.84.22/var/log/router.log