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An LTM Administrator receives an email from the NOC stating that the switch connected to the backend server was shut down for maintenance. The BIG-IP device handles only UDP traffic. The BIG IP device did not fail over to a DR location when no pool members were available.
When the LTM Administrator checks the pool, it confirms that the monitor is still marking UP the pool member.
A tcpdump of the traffic shows the following output:
A list of the monitor configuration shows the following:
Which two modifications to the LTM configuration will mark this pool member down, when the switch is down? (Choose two.)
Suggested Answer: B, D
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13 comments · newest first
SO
Son
11 months ago
Definitely agree with option D, it should help mark it down when the switch is down.
BE
Beckie
11 months ago
Wait, how does a reverse string help with this? Seems odd.
DU
Dulce
11 months ago
Increasing the timeout? That sounds counterproductive.
LE
Lera
12 months ago
I think adding a gatewayjcmp monitor (D) makes sense here.
RO
Rosendo
12 months ago
Just a reminder, UDP doesn't guarantee delivery, so monitoring can be tricky.
MA
Magnolia
12 months ago
I think enabling manual-resume could be useful, but I’m not confident if it’s the best option for this scenario. We need to ensure the monitor reacts quickly.
EL
Elouise
1 year ago
I feel like increasing the timeout might not be the right move here. It could just delay the detection of the down state instead of marking it down.
MA
Macy
1 year ago
I’m not entirely sure, but I think adding a reverse string could help the monitor detect when the backend is unreachable. It seems like a similar question we practiced.
RI
Ricarda
1 year ago
I remember something about monitors needing to accurately reflect the state of the pool members. If the switch is down, we might need a different monitor type.
EM
Emerson
1 year ago
Hmm, I'm a bit confused. Do we need to delete the existing record and insert a new one, or can we just update the existing record? I'm not sure if option D is the right approach.
ST
Staci
1 year ago
Delay seems like the most logical choice here. RIP is all about finding the fastest path, so that has to be the metric it uses, right?
MA
Mabel
1 year ago
Alright, I think I've got a strategy here. I'll start by eliminating the options that are clearly false, like the one about backing up operating system files. Then I'll focus on the remaining options and try to determine which two are true.
MA
Marcos
1 year ago
Hmm, this looks like a tricky one. I'll need to carefully analyze the code to identify any potential vulnerabilities.