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201 · Question #237

Active connections to pool members are unevenly distributed. The load balancing method is Least Connections (member) Priority Group Activation is disabled. What is a potential cause of the event…

The correct answer is C. Persistence profile is applied. If active connections are unevenly distributed despite using the Least Connections load balancing method, the presence of a persistence profile is a common cause.

Section 5: Troubleshoot a BIG-IP System

Question

Active connections to pool members are unevenly distributed. The load balancing method is Least Connections (member) Priority Group Activation is disabled. What is a potential cause of the event distribution?

Options

  • APriority Group Activation is disabled
  • BSSL Profile Server is applied
  • CPersistence profile is applied
  • Dincorrect load balancing method

How the community answered

(20 responses)
  • A
    5% (1)
  • B
    5% (1)
  • C
    80% (16)
  • D
    10% (2)

Why each option

If active connections are unevenly distributed despite using the Least Connections load balancing method, the presence of a persistence profile is a common cause.

APriority Group Activation is disabled

Priority Group Activation being disabled means all available pool members in the same priority group are used, which does not inherently cause uneven distribution with Least Connections.

BSSL Profile Server is applied

An SSL Profile Server handles SSL/TLS negotiation and does not directly influence how connections are distributed among pool members by the load balancing algorithm.

CPersistence profile is appliedCorrect

A persistence profile ensures that subsequent connections from a client are directed to the same pool member, overriding the load balancing algorithm for those connections. This can lead to an uneven distribution of active connections if certain clients generate many requests or if the distribution of initial connections is skewed.

Dincorrect load balancing method

The Least Connections load balancing method is designed to distribute connections evenly, so it would not be the cause of uneven distribution but rather something being overridden.

Concept tested: Load balancing persistence impact

Source: https://techdocs.f5.com/en-us/bigip-15-1-0/big-ip-concepts-load-balancing-persistence-and-routing/about-persistence-and-load-balancing.html

Topics

#persistence profile#load balancing method#least connections#uneven distribution#troubleshooting

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