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201 · Question #279

A virtual server is defined per the charts. The last five client connections were to members C, D, A, B, A. Given the conditions shown in the above graphic, if a client with IP address 205.12.45.52…

The correct answer is D. 172.16.20.4:80. Assuming the virtual server is configured with Source IP persistence, a new connection from client IP 205.12.45.52 will be directed to the pool member to which it has an active persistence record.

Configure Load Balancing Features

Question

A virtual server is defined per the charts. The last five client connections were to members C, D, A, B, A. Given the conditions shown in the above graphic, if a client with IP address 205.12.45.52 opens a connection to the virtual server, which member will be used for the connection.

Exhibit

201 question #279 exhibit

Options

  • A172.16.20.1:80
  • B172.16.20.2:80
  • C172.16.20.3:80
  • D172.16.20.4:80
  • E172.16.20.5:80

How the community answered

(48 responses)
  • A
    2% (1)
  • B
    4% (2)
  • C
    8% (4)
  • D
    85% (41)

Why each option

Assuming the virtual server is configured with Source IP persistence, a new connection from client IP 205.12.45.52 will be directed to the pool member to which it has an active persistence record.

A172.16.20.1:80

This option would be incorrect if Source IP persistence dictates a different pool member or if another load balancing method, not leading to this member, were in use.

B172.16.20.2:80

This option would be incorrect if Source IP persistence dictates a different pool member or if another load balancing method, not leading to this member, were in use.

C172.16.20.3:80

This option would be incorrect if Source IP persistence dictates a different pool member or if another load balancing method, not leading to this member, were in use.

D172.16.20.4:80Correct

If the virtual server uses a Source IP persistence profile, the BIG-IP system ensures that subsequent connections originating from the same client IP address (205.12.45.52) are consistently directed to the same pool member (172.16.20.4:80). This ensures session continuity for the client, overriding general load balancing after initial selection, assuming an active persistence entry exists for this client to this member.

E172.16.20.5:80

This option would be incorrect if Source IP persistence dictates a different pool member or if another load balancing method, not leading to this member, were in use.

Concept tested: BIG-IP Source IP persistence

Source: https://techdocs.f5.com/en-us/big-ip-ltm-16-0-0/big-ip-local-traffic-manager-concepts/persistence-profiles.html

Topics

#persistence profiles#virtual server#pool members#load balancing

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