201 · Question #246
A 8IG-IP Administrator configures a Virtual Server to load balance traffic between 50 webservers for an ecommerce website Traffic is being load balanced using the Least Connections (node) method…
The correct answer is A. Change Default Persistence Profile setting to cookie. To prevent customers from losing shopping cart contents due to requests being sent to different web servers, the BIG-IP Administrator should configure a persistence profile.
Question
A 8IG-IP Administrator configures a Virtual Server to load balance traffic between 50 webservers for an ecommerce website Traffic is being load balanced using the Least Connections (node) method. The webserver administrators report that customers are losing the contents from their shopping carts and are unable to complete their orders. What should the BIG-IP Administrator do to resolve the issue?
Options
- AChange Default Persistence Profile setting to cookie
- BChange Load Balancing method to Ratio (member)
- CChange Default Persistence Profile setting to sipjnfo
- DChange Load Balancing method to Ratio (node)
How the community answered
(20 responses)- A80% (16)
- B10% (2)
- C5% (1)
- D5% (1)
Why each option
To prevent customers from losing shopping cart contents due to requests being sent to different web servers, the BIG-IP Administrator should configure a persistence profile.
Customers losing shopping cart contents indicates a lack of session persistence, meaning successive requests from the same client are being sent to different backend servers. Changing the default persistence profile to 'cookie' ensures that once a client connects to a server, subsequent requests from that client are directed back to the same server, preserving session state and shopping cart contents.
Changing the Load Balancing method to Ratio (node) would alter how initial connections are distributed, similar to option B, and does not provide the necessary session persistence to keep a client connected to the same server.
Concept tested: F5 BIG-IP persistence profiles and session management
Source: https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-local-traffic-management-concepts/persistence-profiles.html#_3
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