Specifications

7-4
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 7 Enabling Management Protocols: NTP, SNMP, and Syslog
Enabling Syslog
The following command identifies how often the NAS is polling and updating to the stratum clock.
An asterisk (*) next to the NTP server’s IP address indicates successful synchronization with the
stratum clock.
5300-NAS#show ntp association
address ref clock st when poll reach delay offset disp
*~172.22.66.18 172.60.8.1 16 46 64 377 1.0 0.53 0.1
* master (synced), # master (unsynced), + selected, - candidate, ~ configured
5300-NAS#
Task 2. Enabling Syslog
The Cisco IOS can send syslog messages to one or more element manager servers. Syslog messages are
then collected by a standard UNIX or NT type syslog daemon.
Syslog enables you to:

Centrally log and analyze configuration events and system error messages such as interface status,
security alerts, environmental conditions, and CPU process overloads.

Capture client debug output sessions in a real-time scenario.

Reserve telnet sessions for making configurations changes and using
show
commands.
This prevents telnet sessions from getting cluttered up with debug output.
Figure 7-2 shows the Cisco IOS sending syslog data to an element manager. Syslog data either stays in
the Cisco IOS buffer or is pushed out and written to the element manager’s hard disk.
Figure 7-2 Syslog Messages Written to Hard Disk
Note
Cisco System’s UNIX syslog format is compatible with 4.3 BSD UNIX.
Cisco IOS sending
syslog data
Element manager
running syslog
deamon
Syslog data
Internal view
Syslog unidirectional
24528
Syslog messages
written to
hard disk