SNAT Route Change: Preserve Session Route Quiz and Flashcards

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Questions and Answers

Which command can be used to configure session route persistence at the interface level?

config system global set session-persistence

config system interface set snat-route-change (correct)

config system global set snat-route-change

config system interface set session-persistence

What is the default value for session route persistence at the interface level?

enable

config system global set snat-route-change

disable (correct)

config system interface set snat-route-change

What happens to sessions passing through an interface when session route persistence is enabled?

They continue to pass without being affected by routing changes (correct)

They are terminated

They are affected by routing changes

They are rerouted to a different interface

What is the default setting for the 'snat-route-change' option when S-NAT is applied?

disable Signup and view all the answers

What happens to sessions with S-NAT when 'snat-route-change' is disabled and a route changes?

They use the same outbound interface as long as the old route is still active Signup and view all the answers

What happens to existing sessions with S-NAT when 'snat-route-change' is disabled and the priority of an interface is increased?

They continue to use the original route until they expire Signup and view all the answers

What is the primary route for internet traffic when both ISP connections are up?

port1 Signup and view all the answers

What happens to new sessions when the priority of 'port1' is increased and 'snat-route-change' is disabled?

They start using 'port2' Signup and view all the answers

What happens to existing sessions when the priority of 'port1' is increased and 'snat-route-change' is disabled?

They continue to use 'port1' Signup and view all the answers

What is the default route for FortiGate?

port1 Signup and view all the answers

Which action is taken by FortiGate after a routing change when source NAT is not applied?

All of the above Signup and view all the answers

What happens to the gateways and interfaces in a session after a routing change without source NAT?

They are set to 0.0.0.0/0 and 0 Signup and view all the answers

What does the 'preserve-session-route' configuration option on the CLI control?

The behavior of routing changes without source NAT Signup and view all the answers

What is the default setting for the 'preserve-session-route' configuration option?

Disable Signup and view all the answers

What happens when the 'preserve-session-route' configuration option is set to 'disable'?

FortiGate flushes all routing information from the session table after a route change Signup and view all the answers

What does FortiGate do after a routing change when source NAT is not applied?

All of the above Signup and view all the answers

What does the 'dirty' flag indicate in a session after a routing change without source NAT?

The session is affected by the routing change Signup and view all the answers

What does the 'preserve-session-route' configuration option do when set to 'enable'?

FortiGate marks existing session routing information as persistent Signup and view all the answers

What information is set to 0.0.0.0/0 and 0 in a session after a routing change without source NAT?

Interfaces Signup and view all the answers

What does FortiGate do after a routing change when source NAT is not applied and the 'preserve-session-route' configuration option is set to 'disable'?

Flushes all routing information from the session table after a route change Signup and view all the answers

Study Notes

Configuring Session Route Persistence

The command to configure session route persistence at the interface level is not specified in the text.

Session Route Persistence

When session route persistence is enabled, sessions passing through an interface are not affected by route changes.
The default value for session route persistence at the interface level is not specified in the text.

S-NAT and Route Changes

When S-NAT is applied, the default setting for the 'snat-route-change' option is not specified in the text.
When 'snat-route-change' is disabled and a route changes, sessions with S-NAT are terminated.
When 'snat-route-change' is disabled and the priority of an interface is increased, existing sessions with S-NAT are terminated.

Routing and Interfaces

When both ISP connections are up, the primary route for internet traffic is not specified in the text.
When the priority of 'port1' is increased and 'snat-route-change' is disabled, new sessions use the new primary route.
When the priority of 'port1' is increased and 'snat-route-change' is disabled, existing sessions are terminated.

FortiGate Behavior

The default route for FortiGate is not specified in the text.
After a routing change when source NAT is not applied, FortiGate updates the gateways and interfaces in the session.
After a routing change without source NAT, the gateways and interfaces in a session are updated.

Preserve-Session-Route Configuration

The 'preserve-session-route' configuration option on the CLI controls whether FortiGate updates the gateways and interfaces in a session after a routing change.
The default setting for the 'preserve-session-route' configuration option is not specified in the text.
When the 'preserve-session-route' configuration option is set to 'disable', FortiGate updates the gateways and interfaces in a session after a routing change.
When the 'preserve-session-route' configuration option is set to 'enable', FortiGate preserves the original gateways and interfaces in a session after a routing change.

Session Information

In a session after a routing change without source NAT, the 'dirty' flag is set to indicate that the session needs to be updated.
In a session after a routing change without source NAT, the information set to 0.0.0.0/0 and 0 indicates that the session needs to be updated.

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Description

This quiz tests your understanding of routing changes without source NAT (S-NAT). Learn about what happens to routing information, route cache entries, and sessions that are not using S-NAT after a routing change. Improve your knowledge of FortiGate and its behavior in these scenarios.

Routing Changes without Source NAT (S-NAT)