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Cisco AS5800 Operations, Administration, Maintenance, and Provisioning Guide
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Chapter 4 Administration
Enabling Management Protocols: NTP, SNMP, and Syslog
Enabling SNMP
The SNMP traps generated by Cisco routers provide:
• Potentially harmful environmental conditions
• Processor status
• Port status
• Security issues
The Cisco IOS software generates SNMP traps based on the features that the Cisco IOS software
supports.
Figure 4-3 shows the interactions and timing of the SNMP protocol between the EM (SNMP manager)
and the NAS (SNMP agent). Traps are unsolicited messages sent from the NAS to the EM. Four
functions of SNMP include: trap, get request, get next, and set request.
Figure 4-3 SNMP Event Interaction and Timing
Note For a listing of all SNMP traps supported by Cisco, refer to Cisco IOS SNMP Traps
Supported and How to Configure Them, available online at
http://www.cisco.com/warp/public/477/SNMP/snmp_traps.html
Agent
(Cisco IOS device)
NMS
NMS
initiated
Trap (agent initiated)
Get request
Get next
Get next
Response
Response
Response
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