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F5 Networks 303 Exam - Topic 3 Question 18 Discussion

In preparation for a maintenance task, an LTM Specialist performs a "Force to Standby" on LTM device Unit 1. LTM device Unit 2 becomes active as expected. The maintenance task requires the reboot of Unit 1. Shortly after the reboot is complete, the LTM Specialist discovers that Unit 1 has become active and Unit 2 has returned to standby.What would cause this behavior?
C) A traffic group is configured with Auto Failback, and Unit 1 is the default device.
A) Unit 1 is set with the redundancy state preference of active in devices groups.
B) Unit 1 is set with the redundancy state preference of active in high availability.
D) A device group is configured with Auto Failback, and Unit 1 is the default device.

F5 Networks 303 Exam - Topic 3 Question 18 Discussion

Actual exam question for F5 Networks's 303 exam
Question #: 18
Topic #: 3
[All 303 Questions]

In preparation for a maintenance task, an LTM Specialist performs a "Force to Standby" on LTM device Unit 1. LTM device Unit 2 becomes active as expected. The maintenance task requires the reboot of Unit 1. Shortly after the reboot is complete, the LTM Specialist discovers that Unit 1 has become active and Unit 2 has returned to standby.

What would cause this behavior?

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Suggested Answer: C

by Bulah at Jul 09, 2025, 09:03 PM

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Latrice
9 months ago
I agree, D seems like the right answer here.
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Felix
9 months ago
I thought Auto Failback only applied to traffic groups?
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Emiko
9 months ago
Definitely, it's probably the redundancy state preference.
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Matthew
9 months ago
Wait, so Unit 1 just takes over after a reboot? That's surprising!
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Jacquelyne
10 months ago
Sounds like Unit 1 has a higher priority set.
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Iluminada
10 months ago
I think I read that if a device group is set to Auto Failback, it could cause this behavior. But I'm not confident if it's the device group or traffic group that's relevant here.
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Loreta
10 months ago
I feel like the answer might be related to the default device settings. Wasn't there something about how the default device impacts failover?
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Vincenza
10 months ago
This scenario seems similar to a practice question about failover behavior. I think Auto Failback could be involved here, but I can't recall the specifics.
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Yuriko
10 months ago
I remember studying redundancy preferences, but I'm not entirely sure if it's the device group or high availability settings that take precedence.
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Torie
11 months ago
I'm pretty confident I know the answer to this one. It's got to be option C - the traffic group is set to Auto Failback with Unit 1 as the default device.
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Jules
11 months ago
Okay, I think I know what's going on here. The key is to look at the redundancy state preferences and any auto failback settings that might be configured.
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Barbra
11 months ago
Hmm, I'm a bit confused by the question. I'll need to review my notes on LTM device failover and redundancy to try to determine the right answer.
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Quiana
11 months ago
This seems like a tricky one. I'll need to think through the high availability and redundancy settings to figure out what could be causing the behavior.
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Kaycee
1 year ago
That's a good point, maybe C is the correct answer after all.
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Jerlene
1 year ago
But wouldn't Auto Failback in a traffic group make more sense?
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Ollie
1 year ago
I'm leaning towards B actually.
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Kaycee
1 year ago
I disagree, I believe it's D.
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Leandro
1 year ago
I'm going with C. It makes the most sense given the scenario. Though I wonder if the LTM Specialist has a history of accidentally pressing the 'Activate Me' button on Unit 1.
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Mitsue
12 months ago
Yeah, it's important to double check before making any changes to avoid unexpected behavior.
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Dana
1 year ago
Maybe the LTM Specialist needs to be more careful with that 'Activate Me' button on Unit 1.
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Dalene
1 year ago
I think it's C too. Auto Failback would explain why Unit 1 became active again.
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Glenn
1 year ago
Wait, isn't this just a case of Murphy's Law in action? Unit 1 was supposed to be the standby, but it just had to go and become the active one.
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Chantell
1 year ago
C) A traffic group is configured with Auto Failback, and Unit 1 is the default device.
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Barrett
1 year ago
A) Unit 1 is set with the redundancy state preference of active in devices groups.
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Dusti
1 year ago
Definitely D. The auto failback on the device group is the culprit here, not the traffic group.
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Halina
1 year ago
Hmm, I think it's C. The auto failback setting on the traffic group would make Unit 1 the active device after the reboot.
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Ettie
1 year ago
Yeah, that makes sense. Auto Failback would switch Unit 1 back to active after the reboot.
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Larue
1 year ago
I agree, C seems like the most likely option.
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Jerlene
1 year ago
I think the answer is C.
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