- SNMP Notification Overview
- Enabling Notifications
- Cisco SNMP Notifications
- Functional Notifications
- Cisco Router Line Card Notifications
- Flash Card Notifications
- Link Notifications
- Packet Forwarding Engine Notifications
- Configuration Notifications
- MPLS Service Notifications
- Routing Protocol Notifications
- Routing Service Notifications
- SONET Notifications
- Chassis Notifications
- RTT Monitor Notifications
- Environmental Notifications
- Redundancy Framework Notifications
- Cable Device Notifications
- CMTS Diagnostic Notifications
- Cable MIB Notifications
Monitoring Notifications
This chapter describes the Cisco CMTS Universal Broadband Series Router notifications supported by the MIB enhancements feature introduced in Cisco IOS Release 12.2SC. SNMP uses notifications to report events on a managed device. The notifications are traps or informs for different events. The router also supports other notifications that are not listed.
SNMP Notification Overview
An SNMP agent can notify the SNMP manager when important system events occur, such as the following:
- An interface or card starts or stops running
- Temperature thresholds are crossed
- Authentication failures occur
When an agent detects an alarm condition, the agent:
- Logs information about the time, type, and severity of the condition
- Generates a notification message, which it then sends to a designated IP host
SNMP notifications are sent as one of the following:
- Traps—Unreliable messages, which do not require receipt acknowledgement from the SNMP manager.
- Informs—Reliable messages, which are stored in memory until the SNMP manager issues a response. Informs use more system resources than traps.
To use SNMP notifications on your system, you must specify trap recipients. These recipients indicate where network registrar notifications are directed. Traps are enabled using the snmp-server enable traps command.
Many commands use the key word traps in the command syntax. Unless there is an option in the command to select either traps or informs, the keyword traps refers to traps, informs, or both. Use the snmp-server host command to specify whether to send SNMP notifications as traps or informs. The types of traps can be specified in command.
Note Most notification types are disabled by default. However, some notification types cannot be controlled with the snmp command. For example, some notification types are always enabled and other types are enabled by a different command. The linkUpDown notifications are controlled by the snmp trap link-status command. If you enter this command with no notification-type keywords, the default is set to enable all notification types controlled by the command.
Specify the trap types if you do not want all traps to be sent. Then use multiple snmp-server enable traps commands, one for each of the trap types that you used in the snmp host command. The event table must have an entry that specifies the action that is to be performed.
For detailed information about notifications and a list of notification types, refer the following Cisco documents at:
- The Traps Sent with SNMP-Server Enabled Traps Configured guide at: http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a008021de3e.shtml
- “Configuring SNMP Support” section in Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2 guide at: http://www.cisco.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf014.html
Enabling Notifications
You can enable MIB notifications using either of the following procedures:
- Using the command-line interface (CLI)—Specify the recipient of the trap message and specify the types of traps sent. For detailed procedures, go to the following URLs:
The Traps Sent with SNMP-Server Enabled Traps Configured guide at: http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a008021de3e.shtml
- Performing an SNMP SET operation with the setany command—To enable or disable MIB notifications, perform an SNMP SET operation on a specific object.
– To enable the notifications set the object to true(1).
– To disable the notifications, set the object to false(2).
Note If you issue the snmp-server enable traps command without a notification-type argument, the router generates traps for all types of events, which might not be desirable. Some MIBs require the user to set additional objects to enable some notifications.
Cisco SNMP Notifications
This section contains tables that describe a MIB event, why the event occurred, and a recommendation as to how to handle the event. Each table lists the following information:
- Event—The event display.
- Description—What the event indicates.
- Probable cause—What might have caused the notification.
- Recommended action—Recommendation as to what should be done when the particular notification occurs.
Note In the following tables, where no action required appears in the Recommended Action column, there might be instances where an application, such as trouble ticketing, occurs.
- Functional Notifications
- Cisco Router Line Card Notifications
- Flash Card Notifications
- Link Notifications
- Packet Forwarding Engine Notifications
- Configuration Notifications
- MPLS Service Notifications
- Routing Protocol Notifications
- Routing Service Notifications
- SONET Notifications
- Chassis Notifications
- RTT Monitor Notifications
- Environmental Notifications
- Redundancy Framework Notifications
- Cable Device Notifications
- CMTS Diagnostic Notifications
- Cable MIB Notifications
Functional Notifications
Table 4-1 lists notifications generated for events that might indicate the failure of the Cisco CMTS uBR router or conditions that might affect the router functionality.
Cisco Router Line Card Notifications
These notifications indicate the failure of a line card or error conditions on the card that might affect the functionality of all interfaces and connected customers.
Table 4-2 lists ENTITY-MIB notifications that the Cisco CMTS uBR router cards and SPAs generate.
Flash Card Notifications
Table 4-3 lists CISCO-FLASH-MIB notifications that the Cisco CMTS uBR router flash cards generate.. These notifications indicate the failure of a flash card or error conditions on the card that might affect the functionality of all interfaces and connected custom.
Link Notifications
Table 4-4 lists notifications that the router generates for link-related (interface) events.
Packet Forwarding Engine Notifications
Table 4-5 lists notifications that the router generates for Packet Forwarding Engine (PFE) events on the Cisco uBR10012 router. For Cisco uBR10012 router, the PFE is the parallel express forwarding network processor (PXF), which is part of the performance routing engine (PRE).
Configuration Notifications
Table 4-6 lists notifications generated by the CMTS router for events related to system configuration.
MPLS Service Notifications
Table 4-7 lists service notifications generated by the CMTS router to indicate conditions for services.
Routing Protocol Notifications
Table 4-8 lists notifications that the Cisco CMTS uBR router generates to indicate error conditions for routing protocols.
Routing Service Notifications
Table 4-9 lists notifications generated by the Cisco CMTS uBR router to indicate error conditions for routing services.
SONET Notifications
Table 4-10 lists alarm notifications generated by the router for SONET events.
Chassis Notifications
Table 4-11 lists CISCO-STACK-MIB notifications generated by the router to indicate that a chassis module has become active or stopped responding. These notifications are supported by the Cisco CMTS router.
RTT Monitor Notifications
Table 4-12 lists CISCO-RTTMON-MIB notifications that can occur during round-trip time (RTT) monitoring.
Environmental Notifications
Table 4-13 lists CISCO-ENVMON-MIB notifications generated for events that might indicate the failure of the Cisco CMTS uBR router or conditions that might affect the router functionality.
Redundancy Framework Notifications
Table 4-14 lists CISCO-RF-MIB notifications that can occur in a redundant system. There are two types of notifications:
- Switch of Activity (SWACT)—Either a forced or automatic switch of active status from the active unit to the standby unit. The former standby unit is now referred to as the active unit.
- Progression—The process of making redundancy state of the standby unit equivalent to that of the active unit. This includes transitioning the RF state machine through several states which drives the RF clients on the active unit to synchronize any relevant data with their peer on the standby unit.
Cable Device Notifications
Table 4-16 lists the notifications that occur in the following supported MIBs:
CMTS Diagnostic Notifications
Table 4-16 lists the notifications that occur in the DOCS-DIAG-MIB.
Cable MIB Notifications
Table 4-17 lists the notifications that occur in the following supported MIBs:
- DOCS-CABLE-DEVICE-TRAP-MIB
- DOCS-REMOTE-QUERY-MIB
- CISCO-CABLE-WIDEBAND-MIB
- CISCO-CABLE-METERING-MIB
- CISCO-DOCS-EXT-MIB