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101 · Question #481

A BIG IP administrator is testing a web server behind ADC. The connection to a Virtual Server is successful but the page is still not loading. Where should the administrator test to determine if the s

The correct answer is A. from server-side interface in ADC.. Because the client-to-Virtual-Server connection succeeds, the fault is isolated to the server-side path, so testing from the ADC's server-side interface directly reveals whether the backend web server is reachable and responding.

Section 2: F5 Solutions and Technology

Question

A BIG IP administrator is testing a web server behind ADC. The connection to a Virtual Server is successful but the page is still not loading. Where should the administrator test to determine if the server is available?

Options

  • Afrom server-side interface in ADC.
  • Bfrom client side interface in ADC
  • Cfrom Workstation client
  • Dfrom switch connected to ADC and Server

How the community answered

(52 responses)
  • A
    85% (44)
  • B
    4% (2)
  • C
    10% (5)
  • D
    2% (1)

Why each option

Because the client-to-Virtual-Server connection succeeds, the fault is isolated to the server-side path, so testing from the ADC's server-side interface directly reveals whether the backend web server is reachable and responding.

Afrom server-side interface in ADC.Correct

Testing from the server-side interface of the ADC (for example, using curl or ping toward the pool member from the ADC's self IP on the server VLAN) targets exactly the segment where the failure must exist. It confirms whether the ADC can reach the server and whether the server returns a valid HTTP response, isolating the problem to the backend without involving the client-side path, which is already known to be functional.

Bfrom client side interface in ADC

Testing from the client-side interface repeats the already-confirmed working path between the client and the Virtual Server and will not expose a server-side connectivity or application issue.

Cfrom Workstation client

Testing from the client workstation traverses the same successful path to the Virtual Server and cannot distinguish whether the problem is in the ADC-to-server segment.

Dfrom switch connected to ADC and Server

Testing from the switch only verifies Layer 2/3 physical connectivity and cannot confirm whether the server application is running or returning correct HTTP responses.

Concept tested: BIG-IP server-side connectivity troubleshooting

Source: https://support.f5.com/csp/article/K13000

Topics

#ADC troubleshooting#virtual server#server-side interface#connectivity testing

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