Cisco IP SLA Configuration Quiz & Flashcards

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Questions and Answers

What is the purpose of the `snmpserver ifindex persist` command?

To prevent index shuffling

What is the purpose of the `snmp-server host` command in Example 23-13?

To send traps related to the CPU to an NMS

What is the primary function of IP SLA in Cisco IOS?

To measure network performance and test network availability

What is the purpose of an IP SLA responder?

To reply to probes sent by the IP SLA source Signup and view all the answers

What should you consider when troubleshooting Cisco IOS IP SLA?

Choose the correct operation for the metrics you intend to measure, ensure destination and source IP addresses are reachable, and ensure correct port numbers Signup and view all the answers

What is an example of a metric that can be measured using IP SLA?

Jitter (interpacket delay variance) Signup and view all the answers

What is the primary requirement to use an IP SLA instance?

The SLA instance needs to be started. Signup and view all the answers

What command can be used to verify the operations supported on a platform and their current status?

show ip sla application Signup and view all the answers

What is the primary function of Troubleshooting Object Tracking?

To dynamically control what occurs if the result of the tracking object is up or down. Signup and view all the answers

What can be tracked using Troubleshooting Object Tracking?

IP routes, IP SLA instances, interfaces, and groups of objects. Signup and view all the answers

What command is used to verify the configuration and status of a tracking object?

show track Signup and view all the answers

What is the primary function of Cisco IOS NetFlow?

To provide insight into network traffic patterns. Signup and view all the answers

What is the primary objective of using management tools in network monitoring?

To stay ahead of any issues and troubleshoot problems efficiently Signup and view all the answers

What command can be used to troubleshoot SCP issues?

debug ip scp Signup and view all the answers

What is the purpose of the show logging command in syslog troubleshooting?

To verify syslog configuration and view syslog messages stored in the buffer Signup and view all the answers

Which port does syslog use, and what is the potential issue that can block traffic to this port?

UDP port 514, and ACLs blocking traffic to this port Signup and view all the answers

What is the benefit of using Cisco DNA Center Assurance in network troubleshooting?

It assists with troubleshooting efforts Signup and view all the answers

When troubleshooting SNMP issues, what is the importance of verifying the correct username and password?

To ensure that the correct credentials are being used for copying Signup and view all the answers

Study Notes

IP SLA Overview

An IP SLA instance must be started for functionality, necessitating a reachable IP SLA responder if needed.
Use the show ip sla application command to check supported operations, configured operations, and active operations on the platform.

Object Tracking

Object Tracking dynamically controls actions based on the status of tracked objects (up or down).
Objects can be linked to static routes. A route is added to the routing table if the object is operational; it is omitted if the object is down.
IP routes, IP SLA instances, interfaces, and groups can be tracked.
Check configurations and statuses using the show track command, confirming operational status tied to reachability of specific IP routes.

NetFlow and Flexible NetFlow

Cisco IOS NetFlow analyzes network traffic patterns and differentiates between traffic flows.
Prevent index shuffling with the snmpserver ifindex persist command.
The snmp-server host command configures SNMPv3 for CPU trap notifications to a Network Management System (NMS) with secure credentials.

Cisco IOS IP SLA Functionality

IP SLA measures network performance and availability by generating consistent probe traffic, simulating real-world usage.
Collects data on packet loss, latency, response times, jitter, resource availability, application performance, and voice quality.
IP SLA consists of a source (probes) and a responder (replies).

Troubleshooting IP SLA

To troubleshoot IP SLA, ensure the correct operation type aligns with intended metrics.
Verify reachability and accuracy of both destination and source IP addresses.
Confirm that port numbers and credentials are correctly configured.
Use debug ip scp for troubleshooting SCP-related issues.

Network Monitoring and Troubleshooting

Effective network monitoring with appropriate tools preempts potential issues.
Troubleshooting focuses on tools, which include syslog, SNMP, IP SLA, Object Tracking, and NetFlow.
Cisco DNA Center Assurance can enhance troubleshooting capabilities.

Syslog Configuration

Confirm syslog is enabled by viewing messages in the buffer with the show logging command.
Example shows logging levels across console, monitor, and trap logging: informational, debugging, and warnings, respectively.
Ensure the correct server IP is specified and reachable, while also checking access control lists (ACLs) for blocking UDP port 514 traffic.

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Description

Learn about the essential steps to configure and troubleshoot IP SLA instances, including the importance of starting the instance and configuring an IP SLA responder. Understand how to verify supported operations on a platform using the show ip sla application command.

Cisco IP SLA Configuration and Troubleshooting

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