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F5 Networks F5CAB5 Exam - Topic 4 Question 11 Discussion

A pool member is exhibiting frequent up-and-down state changes, leading the BIG-IP Administrator to suspect a health monitor issue. Which specific log file should the BIG-IP Administrator review to diagnose the problem?
B) /var/log/ltm
A) /var/log/tmm
C) /var/log/syslog
D) /var/log/audit

F5 Networks F5CAB5 Exam - Topic 4 Question 11 Discussion

Actual exam question for F5 Networks's F5CAB5 exam
Question #: 11
Topic #: 4
[All F5CAB5 Questions]

A pool member is exhibiting frequent up-and-down state changes, leading the BIG-IP Administrator to suspect a health monitor issue. Which specific log file should the BIG-IP Administrator review to diagnose the problem?

Show Suggested Answer Hide Answer
Suggested Answer: B

The Local Traffic Manager (LTM) log file is the primary repository for all events related to load balancing objects, including virtual servers, pools, and nodes.

Monitor Logging: When a health monitor marks a pool member as 'UP' or 'DOWN,' the system generates a log entry in /var/log/ltm.

Diagnosing Flaps: To troubleshoot 'flapping' (frequent state changes), an administrator would look for messages like 01010028:3: Pool /Common/http_pool member /Common/10.10.1.1:80 monitor status down followed quickly by an 'up' status. This log provides the timestamp and the specific monitor that triggered the state change.


by Maryann at May 17, 2026, 06:08 PM

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Gwenn
4 hours ago
Agreed, B) makes sense. It shows traffic and health status.
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Emmanuel
5 days ago
I think it's B) /var/log/ltm. That's where the health monitor logs are.
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Zita
11 days ago
100% agree, /var/log/ltm is where the action is!
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Mendy
16 days ago
Wait, are you sure it’s not /var/log/audit? That seems relevant too.
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Lenna
21 days ago
/var/log/syslog is too general for this specific issue.
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Wilbert
26 days ago
I thought /var/log/tmm was the go-to for this?
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Salome
1 month ago
Definitely check /var/log/ltm for health monitor issues.
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Casie
1 month ago
I agree, /var/log/ltm is where the real info is.
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Lanie
1 month ago
Surprised /var/log/audit isn't the answer, thought it tracked everything!
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Donte
2 months ago
/var/log/syslog is too general for this kind of problem.
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Linwood
2 months ago
I thought /var/log/tmm was the go-to for this?
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Harris
2 months ago
Definitely check /var/log/ltm for health monitor issues.
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Major
2 months ago
I keep mixing up the log files. Is /var/log/syslog even related to health monitors, or is it more general?
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Samira
2 months ago
I practiced a similar question, and I feel like /var/log/ltm was the answer. It seems to be the go-to for monitoring issues.
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Brock
2 months ago
I'm not entirely sure, but I remember something about /var/log/tmm being related to traffic management. Could that be relevant here?
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Gaynell
4 months ago
I think the log file we need to check is /var/log/ltm, since it deals with load balancing and health monitors, right?
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