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Question 33 - NSE7_NST-7.2 discussion

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Refer to the exhibits.

An administrator is attempting to advertise the network configured on port3. However, FGT-A is not receiving the prefix.

Which two actions can the administrator take to fix this problem'' (Choose two.)

A.
Restart BGP using a soft reset, which forces both peers to exchange their complete BGP routing tables.
Answers
A.
Restart BGP using a soft reset, which forces both peers to exchange their complete BGP routing tables.
B.
Manually add the BGP route on FGT-A.
Answers
B.
Manually add the BGP route on FGT-A.
C.
Modify the prefix using the network command from 172.16.0.0/16 to 172.16.54.0724.
Answers
C.
Modify the prefix using the network command from 172.16.0.0/16 to 172.16.54.0724.
D.
Use the set network-import-check disable command.
Answers
D.
Use the set network-import-check disable command.
Suggested answer: A, D

Explanation:

Soft Reset of BGP:

Performing a soft reset of BGP is a common method to resolve issues where prefixes are not being received. It forces both BGP peers to resend their complete routing tables to each other.

This can be done using the command: execute router clear bgp soft in and execute router clear bgp soft out.

Network Import Check:

The network-import-check command controls whether the FortiGate should verify that the prefix exists in the routing table before advertising it.

Disabling this check can resolve issues where valid prefixes are not advertised due to stringent verification.

The command to disable this is: config router bgp set network-import-check disable end.

BGP Configuration Verification:

Ensure that the BGP configuration on FGT-B is correctly set to advertise the network 172.16.54.0/24.

Verify that the network statement is correctly configured and matches the intended prefix.

Fortinet Community: Technical Note on Configuring BGP (Welcome to the Fortinet Community!).

Fortinet Documentation: Configuring BGP on FortiGate (Fortinet Document Library).

asked 18/09/2024
Navaid Ali
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