201 · Question #111
Refer to the exhibit. Due to a change in application requirements, a BIG-IP Administrator needs to modify the configuration of a Virtual Server to include a Fallback Persistence Profile. Which…
The correct answer is D. Source Address Affinity. When configuring a Virtual Server with a fallback persistence profile, the Source Address Affinity persistence profile is commonly used. This profile allows the BIG-IP to maintain client-server connections based on the client's source IP address if the primary persistence…
Question
Refer to the exhibit. Due to a change in application requirements, a BIG-IP Administrator needs to modify the configuration of a Virtual Server to include a Fallback Persistence Profile. Which persistence profile type should the BIG-IP Administrator use for this purpose?
Exhibit
Options
- ASSL
- BHash
- CUniversal
- DSource Address Affinity
How the community answered
(20 responses)- A5% (1)
- B5% (1)
- C20% (4)
- D70% (14)
Why each option
When configuring a Virtual Server with a fallback persistence profile, the Source Address Affinity persistence profile is commonly used. This profile allows the BIG-IP to maintain client-server connections based on the client's source IP address if the primary persistence method fails.
SSL persistence is used to maintain persistence for SSL sessions based on the SSL session ID, not typically as a generic fallback.
Hash persistence uses a hash of an arbitrary string to determine the server, which is specific and not a general fallback.
Universal persistence allows for highly flexible persistence based on any data in the request or response, often requiring iRules, making it more complex than a simple fallback.
The Source Address Affinity persistence profile is often chosen as a fallback persistence method because it is simple and reliable, maintaining persistence based on the client's source IP address if the primary persistence method (e.g., cookie, MSRDP) is unavailable or fails. It ensures that subsequent connections from the same client IP are directed to the same server, providing a basic level of session continuity.
Concept tested: F5 BIG-IP Virtual Server fallback persistence profiles
Source: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-local-traffic-management-concepts/using-fallback-persistence.html
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