Cisco 300-410 Exam - Topic 11 Question 87 Discussion

Actual exam question for Cisco's 300-410 exam

Question #: 87
Topic #: 11

Refer to the exhibit.

An engineer configured IP SLA to monitor a next hop on a router for reachability When the next hop is unreachable, the router is executing tracking and failing over another route, but packet loss is experienced because the reachability is flapping. Which action resolves the issue?

AAppend delay up 0 down Ovto the track command

BIncrease the timeout of the sla probe to 6000

CAppend delay up SO down 60vto the track command

DIncrease the frequency of the sla probe to 60.

Show Suggested Answer

Suggested Answer: C

IP SLA (Internet Protocol Service Level Agreement) is a feature that allows you to measure network performance such as latency, jitter, packet loss, and so on.In this case, it's being used to monitor the reachability of a next hop on a router123.

When the next hop is unreachable, the router is executing tracking and failing over to another route. However, packet loss is experienced because the reachability is flapping. This could be due to the router switching back and forth between the primary and backup routes too quickly.

To resolve this issue, you can introduce a delay in the tracking process. This can be done by appending a delay to the track command.Option C suggests appending a delay of 50 seconds for the up state and 60 seconds for the down state45. This means that the router will wait for 50 seconds before declaring the tracked object as up (reachable) and 60 seconds before declaring it as down (unreachable).This delay can help prevent the router from switching routes too quickly, thus reducing the chances of reachability flapping and packet loss45.

Configure ISP Failover with Default Routes Using IP SLA Tracking - Cisco

Using IPSLA to change routing - Cisco Community

How to Use IP SLA Technology to Assess WAN Performance

Reliable Static Routing with IP SLA - NetworkLessons.com

Configuring Static Route Tracking using IP SLA (Basic)

by Thaddeus at Apr 30, 2024, 11:57 AM

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Jacquline

5 months ago

I heard that flapping can be tricky to resolve, but this seems like a solid fix.

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Devorah

6 months ago

Option C seems interesting, but I'm not sure about the values.

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Horace

6 months ago

Wait, why would we increase the frequency? That sounds counterproductive.

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Shonda

6 months ago

Totally agree, increasing the timeout makes sense!

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Jerry

6 months ago

I think option B is the best choice.

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Arleen

7 months ago

Increasing the frequency of the SLA probe seems risky; I thought we learned that could lead to more flapping instead of less.

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Daniel

7 months ago

I feel like we did a similar question where we had to adjust the delay settings, but I can't remember if it was "up 0 down 0" or something else.

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Dolores

7 months ago

I think increasing the timeout for the SLA probe could help stabilize the reachability checks, but I can't recall the exact value we practiced with.

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Colton

7 months ago

I remember we discussed how adding delay to the track command can help with flapping issues, but I'm not sure if it's the right amount.

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Michael

7 months ago

The question mentions IP SLA, so I'm guessing the probe settings will be important. I'll focus on the timeout and frequency options to see which one makes the most sense.

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Amalia

7 months ago

I'm a bit unsure about this one. The options seem similar, so I'll need to really analyze the differences between them to pick the best solution.

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Jesusita

7 months ago

Okay, I think I've got it. Increasing the delay on the track command should help smooth out the flapping and reduce the packet loss.

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Sommer

7 months ago

Hmm, the key seems to be resolving the flapping issue with the next hop reachability. I'll have to consider how to stabilize the tracking and failover.

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Clorinda

7 months ago

This looks like a tricky networking question. I'll need to carefully read through the details and think through the options.

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Gail

7 months ago

Wait, I'm a bit confused. Does the CUIC database actually set up enterprise replication? I'm not sure about that one.

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Sharen

7 months ago

Wait, I'm a bit confused. Does Netinstall also allow you to reset a lost admin password? I'm not sure about that one, so I'll have to think it through.

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