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Palo Alto Networks Exam PCSFE Topic 3 Question 30 Discussion

Actual exam question for Palo Alto Networks's PCSFE exam
Question #: 30
Topic #: 3
[All PCSFE Questions]

Which two design options address split brain when configuring high availability (HA)? (Choose two.)

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Suggested Answer: A, B

The two design options that address split brain when configuring high availability (HA) are:

Adding a backup HA1 interface

Using the heartbeat backup

Split brain is a condition that occurs when both firewalls in an HA pair assume the active role and start processing traffic independently, resulting in traffic duplication, policy inconsistency, or session disruption. Split brain can be caused by network failures, device failures, or configuration errors that prevent the firewalls from communicating their HA status and synchronizing their configurations and sessions. Adding a backup HA1 interface is a design option that addresses split brain when configuring HA. The HA1 interface is used for exchanging HA state information and configuration synchronization between the firewalls. Adding a backup HA1 interface provides redundancy and failover protection for the HA1 interface, ensuring that the firewalls can maintain their HA communication and avoid split brain. Using the heartbeat backup is a design option that addresses split brain when configuring HA. The heartbeat backup is a mechanism that allows the firewalls to send additional heartbeat messages through an alternate path, such as a management interface or a data interface, to verify the health of the peer firewall. Using the heartbeat backup prevents split brain caused by network failures or device failures that affect the primary HA interfaces. Bundling multiple interfaces in an aggregated interface group and assigning HA2, and sending heartbeats across the HA2 interfaces are not design options that address split brain when configuring HA, but they are related features that can enhance performance and reliability. Reference:Palo Alto Networks Certified Software Firewall Engineer (PCSFE), [High Availability Overview], [Configure HA Backup Links], [Configure Heartbeat Backup]


by Macy at Sep 17, 2024, 07:42 AM

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Lon
2 months ago
Haha, split brain? More like split personality! I'm going with B and D, gotta keep those heartbeats pumping strong.
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Bulah
2 months ago
C'mon, this is easy! B and D are the way to go. Heartbeats are the key to keeping those HA nodes in sync and avoiding any brain-splitting mishaps.
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Malcom
6 days ago
User3: Adding a backup HA1 interface is also important.
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Jannette
7 days ago
User4: Bundling multiple interfaces in an aggregated interface group is a good idea too.
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Ozell
9 days ago
User2: Agreed, heartbeats are essential for high availability.
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Salena
1 months ago
User1: I think B and D are the correct options.
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Sharmaine
2 months ago
Whoa, this question is tricky! I'm going with B and D too. Gotta make sure those heartbeats are flowing smoothly, you know?
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Lon
2 months ago
I think the correct answers are B) Using the heartbeat backup and D) Sending heartbeats across the HA2 interfaces. This helps prevent split brain issues by ensuring a reliable communication channel between the HA nodes.
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Charlena
23 days ago
C) Bundling multiple interfaces in an aggregated interface group and assigning HA2
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Kenia
26 days ago
B) Using the heartbeat backup
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Gerald
28 days ago
A) Adding a backup HA1 interface
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Odette
2 months ago
I'm not sure, but I think adding a backup HA1 interface could also be a good option to address split brain.
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Timmy
3 months ago
I agree with Fletcher, using aggregated interface group and sending heartbeats across HA2 interfaces can help prevent split brain.
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Fletcher
3 months ago
I think options C and D are the best choices.
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