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101 · Question #123

When is a Virtual Server hosted by an LTM System defined with two IP addresses?

The correct answer is C. Two addresses are used to define Virtual Servers when the LTM System hosting it is behind a. A GTM virtual server is defined with two IP addresses when the hosting LTM system is located behind a NAT device, requiring both the private internal address and the public translated address.

Section 2: F5 Solutions and Technology

Question

When is a Virtual Server hosted by an LTM System defined with two IP addresses?

Options

  • ATwo addresses are used to define the Virtual Server when it is managed by redundant LTM
  • BTwo addresses are used to define some Virtual Servers so that the GTM System can choose the
  • CTwo addresses are used to define Virtual Servers when the LTM System hosting it is behind a
  • DTwo addresses are used to define a Virtual Server when the WideIP should resolve to a different

How the community answered

(40 responses)
  • A
    13% (5)
  • B
    8% (3)
  • C
    78% (31)
  • D
    3% (1)

Why each option

A GTM virtual server is defined with two IP addresses when the hosting LTM system is located behind a NAT device, requiring both the private internal address and the public translated address.

ATwo addresses are used to define the Virtual Server when it is managed by redundant LTM

Redundant LTM systems in an active/standby pair do not require two IPs per virtual server; each node uses its own floating IP, and virtual server definitions remain single-addressed.

BTwo addresses are used to define some Virtual Servers so that the GTM System can choose the

GTM selecting an optimal virtual server is handled through load balancing methods and pool configuration, not by assigning two IP addresses to a single virtual server object.

CTwo addresses are used to define Virtual Servers when the LTM System hosting it is behind aCorrect

When an LTM system sits behind a NAT device, its virtual servers have both a private (internal) IP and a publicly translated IP. GTM must be configured with both addresses so it can monitor the virtual server using the internal address while advertising the external NAT address to DNS clients for proper traffic routing.

DTwo addresses are used to define a Virtual Server when the WideIP should resolve to a different

Having a WideIP resolve to a different address is controlled by WideIP pool and load balancing method settings, not by the two-address definition of a virtual server on the LTM.

Concept tested: GTM virtual server dual IP definition behind NAT

Source: https://support.f5.com/csp/article/K14707

Topics

#virtual server#NAT#LTM#GTM configuration

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