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Difficulty: MediumNetwork Performance Monitoring and Metrics

A network engineer is establishing a telemetry and performance monitoring architecture for remote site routers experiencing performance degradation during real-time video conferencing. The solution must capture flow-level metrics such as packet loss and inter-arrival jitter for video traffic while ensuring secure, encrypted polling of router hardware resources (CPU and memory utilization). Which of the following protocols and configurations should the engineer implement? (Select TWO.)

  1. Configure SNMPv3 with the authPriv security level for polling router resource utilization metrics.Answer
  2. Deploy IPFIX flow telemetry exporting over UDP to collect traffic stream statistics and inter-arrival jitter.Answer
  3. C
    Utilize SNMPv2c with read-only community strings to encrypt bandwidth and system resource telemetry.
  4. D
    Configure IPFIX export over TCP port 161 to guarantee delivery of real-time voice jitter metrics.

Answer

The engineer should implement SNMPv3 configured with the authPriv security level for secure system resource polling and deploy IPFIX flow telemetry over UDP to capture real-time traffic jitter and stream performance metrics.
Configuring SNMPv3 with authPriv provides cryptographic authentication and payload privacy, which secures router CPU and memory utilization queries. Implementing IPFIX over UDP allows the monitoring system to capture detailed flow statistics, tracking packet loss, throughput, and inter-arrival jitter for real-time video streams without transport-layer retransmission latency.

Step-by-Step Solution

1
Identify the protocol and security configuration required for secure hardware metric polling.
SNMPv3 with authPriv provides cryptographic authentication and encryption for monitoring system metrics like CPU and memory utilization.
SNMPv1 and SNMPv2c transmit community strings in cleartext without payload encryption, whereas SNMPv3 authPriv secures administrative polling.
2
Select the appropriate flow monitoring protocol and transport for real-time traffic performance.
IPFIX exporting over UDP monitors flow-level performance, capturing packet loss and inter-arrival jitter without retransmission delays.
Flow telemetry protocols like IPFIX analyze packet headers across switch and router interfaces, utilizing UDP to stream performance statistics in real time.

Key Concept

Network Telemetry Protocols and SNMP Security Levels
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Topics

Network Performance Monitoring and Metrics

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