FCSS_CDS_AR-7.6 · Question #67
You are experiencing intermittent connectivity issues in a FortiGate HA cluster deployed with Azure gateway load balancer. Traffic is being dropped when it passes through the cluster. What is the…
The correct answer is D. The FortiGate firewalls are using the default maximum transmission unit (MTU) size supported by. By default, FortiGate firewalls use an MTU size larger than what Azure supports. In an HA cluster with a gateway load balancer, this mismatch causes packet drops and intermittent connectivity issues. The MTU must be adjusted to the Azure-supported value (typically 1500 or lower…
Question
You are experiencing intermittent connectivity issues in a FortiGate HA cluster deployed with Azure gateway load balancer. Traffic is being dropped when it passes through the cluster. What is the cause of the issue?
Options
- AThe Azure gateway load balancer is blocking large packets, causing traffic failures.
- BThe protected VMs are running an application that fragments packets.
- CThe Azure gateway load balancer is configured with an incorrect health probe port.
- DThe FortiGate firewalls are using the default maximum transmission unit (MTU) size supported by
How the community answered
(66 responses)- A5% (3)
- B18% (12)
- C9% (6)
- D68% (45)
Explanation
By default, FortiGate firewalls use an MTU size larger than what Azure supports. In an HA cluster with a gateway load balancer, this mismatch causes packet drops and intermittent connectivity issues. The MTU must be adjusted to the Azure-supported value (typically 1500 or lower depending on encapsulation).
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