Most Recent Fortinet NSE7_EFW-7.2 Exam Questions & Answers

The neighbor-group command in FortiOS allows for the application of common settings to a group of neighbors in OSPF, and can also be used to simplify configuration by applying common settings to both IBGP and EBGP neighbors. This grouping functionality is a part of the FortiOS CLI and is documented in the Fortinet CLI reference.

From the partial OSPF (Open Shortest Path First) configuration output:

B . The router sends grace LSAs before it restarts: This is implied by the command 'set restart-mode graceful-restart'. When OSPF is configured with graceful restart, the router sends grace LSAs (Link State Advertisements) to inform its neighbors that it is restarting, allowing for a seamless transition without recalculating routes.

Fortinet documentation on OSPF configuration clearly states that enabling graceful restart mode allows the router to maintain its adjacencies and routes during a brief restart period.

In IKE version 2, not all packets are fragmentable. Only certain messages within the IKE negotiation process can be fragmented. Additionally, there is a limit to the number of fragments that IKE version 2 can handle, which is 128. This is specified in the Fortinet documentation and ensures that the IKE negotiation process can proceed even in networks that have issues with large packets. The reassembly timeout and the layer at which fragmentation occurs are not specified in this context within Fortinet documentation.

C . The hub adds routes based on IKE negotiations: This is part of the ADVPN functionality where the hub learns about the networks behind the spokes and can add routes dynamically based on the IKE negotiations with the spokes.

D . You must configure phase 2 quick mode selectors to 0.0.0.0 0.0.0.0: This wildcard setting in the phase 2 selectors allows any-to-any tunnel establishment, which is necessary for the dynamic creation of spoke-to-spoke tunnels.

These configurations are outlined in Fortinet's documentation for setting up ADVPN, where the hub's role in route control and the use of wildcard selectors for phase 2 are emphasized to enable dynamic tunneling between spokes.

ADVPN (Auto Discovery VPN) is a feature that allows to dynamically establish direct tunnels (called shortcuts) between the spokes of a traditional Hub and Spoke architecture. The auto-discovery receiver must be set to enable on the spokes to allow them to receive NHRP messages from the hub and other spokes. NHRP (Next Hop Resolution Protocol) is used for on-demand tunnels, which are established when there is traffic between spokes. Routing is configured by enabling add-nhrp-route, not add-advpn-route.Reference: ADVPN | FortiGate / FortiOS 7.2.0 | Fortinet Document Library,Technical Tip: Fortinet Auto Discovery VPN (ADVPN)