Exam 300-420 topic 1 question 77 discussion

Actual exam question from Cisco's 300-420

Question #: 77
Topic #: 1

Refer to the exhibit. An engineer must design an automatic failover solution. The solution should allow HSRP to detect a WAN 1 failure and initiate an automatic failover, making router R2 the active HSRP router. Which two solutions should the engineer choose? (Choose two.)

A. implement IP SLA on router R1
B. implement PBR on router R1
C. implement Enhanced Object Tracking on router R1
D. use IP source routing
E. use a floating static route

Show Suggested Answer

Suggested Answer: AC 🗳️

by [deleted] at Sept. 25, 2022, 7:30 p.m.

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SpicyMochi

7 months, 3 weeks ago

Selected Answer: AC

A. Implement IP SLA on router R1 C. Implement Enhanced Object Tracking on router R1 Explanation: To achieve automatic failover with HSRP, you can use Enhanced Object Tracking (EOT) and IP SLA. EOT is a feature that enables tracking of a configurable object and can modify HSRP priority or state based on the status of the tracked object. IP SLA is a feature that generates and sends synthetic traffic to a specified destination and can trigger EOT based on the status of the tracked object. By configuring IP SLA on router R1 to track WAN 1 and then configuring EOT on R1 to decrement the HSRP priority or change the HSRP state, you can achieve automatic failover to router R2 in the event of a WAN 1 failure.

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DOSKIM

9 months ago

AC are the correct answers

upvoted 1 times

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Reinier_veen

1 year, 1 month ago

Selected Answer: AC

https://ipwithease.com/ip-sla-with-hsrp/ IP SLA to check availability ISP 1. opject tracking the IP SLA vfor reducing preemtion

upvoted 4 times

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[Removed]

1 year, 2 months ago

Selected Answer: AE

I would say IP SLA operation with a floating static route. Check the following link : https://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/813-cisco-router-ipsla-basic.html

upvoted 1 times

SlyNZ99

1 year, 2 months ago

That would be right for doing a default route however this is for changing HSRP priorities so the standby takes over, Enhanced object tracking would lower the actives priority forcing a failover to standby AC is the right answer

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johnu329

1 year, 2 months ago

Floating routes are used when a router is connected to two uplinks. In our case, we have WAN1 connected to R1 - and WAN2 connected to R2 (i.e. only one uplink to WAN per router). Therefore, I would go with A and C in this case. If R1 and R2 are both connected to WAN1 and WAN2, I would agree with you (A and E).

upvoted 3 times

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