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352-001 · Question #224

What is downstream suppression?

The correct answer is A. the ability of a fault management tool to generate alerts for only an upstream device failure and to. Downstream suppression is a fault management capability that suppresses alerts for devices that are unreachable only because an upstream device has failed, reducing alert storms.

Designing Management and Operations

Question

What is downstream suppression?

Options

  • Athe ability of a fault management tool to generate alerts for only an upstream device failure and to
  • Bthe ability of devices to exclusively send summary routes and suppress the sending of complete
  • Cthe ability of a router to suppress downstream route fluctuations to avoid introducing instability into
  • Dthe ability of a network management station to perform root cause analysis on a network fault and
  • Ethe ability of an element manager to restrict forwarding to critical performance alarms northbound to

How the community answered

(34 responses)
  • A
    94% (32)
  • C
    3% (1)
  • E
    3% (1)

Why each option

Downstream suppression is a fault management capability that suppresses alerts for devices that are unreachable only because an upstream device has failed, reducing alert storms.

Athe ability of a fault management tool to generate alerts for only an upstream device failure and toCorrect

When an upstream device fails, all devices downstream of it also become unreachable and would normally generate their own alerts. Downstream suppression prevents this alert storm by identifying the root cause upstream failure and suppressing redundant alerts for devices that are down solely as a consequence of that upstream failure, allowing operators to focus on the actual fault.

Bthe ability of devices to exclusively send summary routes and suppress the sending of complete

This describes route summarization, which is a routing optimization technique for reducing routing table size, not a fault management concept.

Cthe ability of a router to suppress downstream route fluctuations to avoid introducing instability into

This describes route dampening or flap dampening, a BGP/IGP mechanism to suppress unstable routes, not a fault alert suppression feature.

Dthe ability of a network management station to perform root cause analysis on a network fault and

This describes root cause analysis itself - the analytical process performed by a network management station - which is related to but distinct from downstream suppression, which is specifically about alert suppression.

Ethe ability of an element manager to restrict forwarding to critical performance alarms northbound to

This describes northbound alarm filtering or forwarding to an OSS/BSS - a data reduction technique for escalation - not downstream suppression triggered by upstream device failures.

Concept tested: Fault management downstream alert suppression

Source: https://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/infrastructure/3-8/user/guide/bk_CiscoPrimeInfrastructure_3_8_UserGuide/bk_CiscoPrimeInfrastructure_3_8_UserGuide_chapter_0100111.html

Topics

#fault management#downstream suppression#root cause analysis#network alerts

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