Fortinet FCSS_EFW_AD-7.4 Exam With Confidence Using Practice Dumps

When designing anADVPN (Auto-Discovery VPN) networkfor alarge enterprisewith spokes that havevarying numbers of internet links, the main challenge is tominimize the number of peer connections and routesat the hub while maintainingscalability and efficiency.

Using a dynamic routing protocol (such as BGP or OSPF) with loopback interfaces helps in several ways:

●Reduces the number of peer connectionsat the hub byusing a single loopback address per spokeinstead of individual physical interfaces.

●Enables simplified route advertisementby dynamically learning and propagating routes instead of manually configuring static routes.

●Supports multiple internet links per spokeefficiently, as dynamic routing can automatically adjust to the best available path.

●Allows seamless failoverif a spoke’s internet link fails, ensuring continuous connectivity.

Zero phase selectors inIPsec Phase 2mean thatno specific traffic selectors (subnets) are defined, allowingany traffic to be encryptedthrough the VPN tunnel. This can causeunintended traffic forwarding issuesand disrupt network operations.

To prevent this from happening during future migrations:

●Using routing protocolsensures thatonly specific subnets are advertised over the tunnel. Dynamic routing (such as OSPF or BGP) helps define which networks should use the tunnel, preventing unintended traffic from being encrypted.

●Clearly defining phase 2 selectorsavoids the problem of encrypting all traffic byexplicitly stating the allowed source and destination subnets. This prevents the tunnel from affecting unrelated network traffic.

The diagram shows a FortiGate connected to two FortiSwitches, which suggests the use ofFortiLink, Fortinet's protocol for managing switches directly from a FortiGate. Since multiple connections are being used, the LAN interface must be set to802.3ad (LAG)mode to aggregate the links for redundancy and load balancing.

This setup allows FortiGate to handle VLAN assignments dynamically, as seen withVLAN 10 (192.168.15.1/24). FortiLink ensures seamless integration between FortiGate and FortiSwitches, making STP unnecessary because Fortinet'sMCLAGprevents loops at Layer 2. SD-WAN, on the other hand, is used for WAN interfaces and does not apply to switch connectivity in this scenario.