Threshold reaching alarms overview
Introduction
In addition to routing alarms generated by routers, there are threshold reaching alarms generated by the CPAA. The alarm generation process uses the routing data collected by the CPAA. The generated alarms are sent to the CPAM using a proprietary protocol over the TCP channel. The alarms are then available to CPAM XML API clients, in the same manner that alarms generated in the NFM-P are sent to XML API clients.
For threshold reaching alarms, you can use the NFM-P GUI to configure thresholds to suit your requirements. The alarms are listed by class and alarm name (with no spaces), and also use a long name for ease of reading and identification. The long name appears as the form name on the threshold configuration form. See To configure alarm thresholds.
The following table describes the CPAM threshold reaching alarms:
Table 16-1: CPAM threshold reaching alarms
|
Long name/Threshold configuration form name class.AlarmName |
Index number |
Description |
|---|---|---|
|
BGP AS Path Length Per Monitored Prefix Threshold topology.BgpAsPathLenPerMonPrefThresholdReached |
795 |
Raised when the AS path length for a monitored prefix reaches or exceeds the configured threshold. The alarm is cleared when the AS path length falls below the threshold. |
|
BGP Redundancy Loss Per Monitored Prefix Threshold topology.BgpMonPrefRedundancyLossThresholdReached |
796 |
Raised when number of next hops for a monitored prefix reaches or falls below the configured threshold. The alarm is cleared when the number of next hops exceeds the threshold. |
|
BGP Monitor Prefix Flap Rate Threshold topology.BgpMonitorPrefixFlapRateThresholdReached |
432 |
Raised when the rate of change—addition, withdrawal, or next hop change—for a BGP monitored prefix reaches or exceeds a predefined value. For BGP and MP-BGP. |
|
BGP Packet Rate Threshold topology.BgpPktRateThresholdReached |
431 |
Raised when the rate of update packets received by the CPAA reaches or exceeds a predefined value. |
|
BGP Route Count Threshold topology.BgpRouteCountThresholdReached |
428 |
Raised when the number of BGP routes received by a CPAA in a BGP AS for a specific next hop reaches or exceeds a predefined value. |
|
BGP Route Flap Rate Threshold topology.BgpRouteFlapRateThresholdReached |
430 |
Raised when the route withdrawal rate per second — an indication of route flapping — received for a specific next hop reaches or exceeds a predefined value. |
|
BGP Route High Watermark Per RT Threshold topology.BgpRouteHighWatermarkPerRTargetReached |
433 |
Raised when the number of routes for an IP VPN route target reaches or exceeds a predefined value upper limit value. |
|
BGP Route Low Watermark Per RT Threshold topology.BgpRouteLowWatermarkPerRTargetReached |
434 |
Raised when the number of routes for an IP VPN route target reaches or falls below a predefined lower limit value. |
|
BGP Route Rate Threshold topology.BgpRouteRateThresholdReached |
429 |
Raised when the rate of the routes—both updates and withdrawal—received for a specific next hop reaches or exceeds a predefined value. |
|
BGP Route Rate Per RT Threshold topology.BgpRouteRateThresholdPerRTargetReached |
435 |
Raised when the rate of the routes—both updates and withdrawal— received for an IP VPN route target reaches or exceeds a predefined value. |
|
BGP Route Change Per Next Hop Threshold topology.BgpRouteChangeThresholdPerNHopReached |
601 |
Raised when the percentage of route changes for a next hop reaches or exceeds a predefined value.The range is 10% to 100%. For example, if the baseline is 10 000, and the percentage set by this threshold is 10%, an alarm is raised when the number of routes reaches 11 000 or drops to 9 000. When it drops down to 10 000, the alarm is cleared. If the number continues to rise or drop, no additional alarm or alarm history is added. A single baseline and threshold pair—10000 and 10%—is configured and used per next hop. If the number of routes is not the same as the predefined baseline, the alarm policy for that next hop is in effect only after the number exceeds or drops below the baseline. |
|
BGP Route Change Per RT Threshold topology.BgpRouteChangeThresholdPerRTargetReached |
600 |
Raised when the percentage of route changes for a IPv4 IP-VPN route target reaches or exceeds a predefined value. The range is 10% to 100%. For example, if the baseline is 10 000, and the percentage set by this threshold is 10%, an alarm is raised when the number reaches 11 000 or drops to 9 000. When it drops down to 10 000, the alarm is cleared. If the number continues to rise or drop, no additional alarm or alarm history is added. A single baseline and threshold pair—10000 and 10%—is configured and used per IPv4 IP-VPN route target. If the number of routes is not the same as the predefined baseline, the alarm policy for that route target is in effect only after the number exceeds or drops below the baseline. |
|
ISIS LSP Alarm Threshold topology.IsisLspThresholdExceeded |
375 |
Raised when the number of LSPs per ISIS routing level in the LSDB of a CPAA reaches or exceeds a predefined value. The number of LSPs is too high. |
|
ISIS LSP Rate Alarm Threshold topology.IsisLspRateThresholdExceeded |
376 |
Raised when the number of LSPs received per second and per ISIS routing level on a CPAA reaches or exceeds a predefined rate. |
|
ISIS Reachability Threshold topology.IsisReachabilityThresholdExceeded |
377 |
Raised when the number of reachabilities per ISIS routing level in the LSDB of a CPAA reaches or exceeds a predefined value. The number of prefixes is too high. |
|
OSPF External LSA Alarm Threshold topology.OspfExternalLsaThresholdExceeded |
372 |
Raised when the number of OSPF external LSAs in the LSDB of a CPAA reaches or exceeds a predefined value. The number of external LSAs is too high. |
|
OSPF LSA Rate Per Router Alarm Threshold topology.OspfLsaRateThresholdExceededPerRouter |
308 |
Raised when the number of OSPF LSAs received per second by a CPAA from a router reaches or exceeds a predefined rate. |
|
OSPF LSA Per Router Alarm Threshold topology.OspfLsaThresholdExceededPerRouter |
374 |
Raised when the number of OSPF LSAs from a router in the LSDB of a CPAA reaches or exceeds a predefined value. The number of LSAs advertised from the router is too high. |
|
OSPF Internal LSA Alarm Threshold topology.OspfInternalLsaThresholdExceededPerArea |
309 |
Raised when the number of internal OSPF LSAs in the LSDB of a CPAA for the specified area reaches or exceeds a predefined value. The number of LSAs advertised in the OSPF area is too high. |
|
OSPF Internal LSA Rate Alarm Threshold topology.OspfInternalLsaRateThresholdExceededPerArea |
310 |
Raised when the number of internal OSPF LSAs received per second for the specific area on a CPAA reaches or exceeds a predefined rate. |
The following figure shows an ISIS LSP rate alarm threshold configuration form:
Figure 16-1: ISIS LSP Rate Alarm Threshold configuration form
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