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201 · Question #42

Which IP address will the client address be changed to when SNAT automap is specified within a Virtual Server configuration.

The correct answer is A. The floating self IP address on the VLAN where the packet leaves the system.. This question clarifies which specific IP address SNAT automap uses as the source for client connections when configured on a virtual server.

Section 2: Configure Load Balancing Features

Question

Which IP address will the client address be changed to when SNAT automap is specified within a Virtual Server configuration.

Options

  • AThe floating self IP address on the VLAN where the packet leaves the system.
  • BThe floating self IP address on the VLAN where the packet arrives on the system.
  • CIt will alternate between the floating and non floating self IP address on the VLAN where the packet leaves
  • DIt will alternate between the floating and non floating self IP address on the VLAN where the packet arrives

How the community answered

(29 responses)
  • A
    90% (26)
  • C
    7% (2)
  • D
    3% (1)

Why each option

This question clarifies which specific IP address SNAT automap uses as the source for client connections when configured on a virtual server.

AThe floating self IP address on the VLAN where the packet leaves the system.Correct

When SNAT automap is enabled on a virtual server, the BIG-IP system selects a self-IP address on the VLAN where the packet is leaving the system to forward to the pool member, prioritizing a floating self-IP address if one is available for consistent source translation.

BThe floating self IP address on the VLAN where the packet arrives on the system.

SNAT automap translates the source IP for traffic *leaving* the BIG-IP towards the backend server, so it uses a self-IP on the outbound VLAN, not the VLAN where the packet arrives.

CIt will alternate between the floating and non floating self IP address on the VLAN where the packet leaves

SNAT automap does not alternate between floating and non-floating self-IP addresses; it consistently uses a floating self-IP if one is available on the egress VLAN.

DIt will alternate between the floating and non floating self IP address on the VLAN where the packet arrives

SNAT automap uses a self-IP on the egress VLAN, not the ingress VLAN, and does not alternate between floating and non-floating IPs.

Concept tested: F5 BIG-IP SNAT automap IP selection

Source: https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/bigip-virtual-server-implementations-12-1-0/2.html

Topics

#SNAT automap#virtual server#source IP address

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