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Question 27 - NSE7_EFW-7.2 discussion

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An administrator has configured two fortiGate devices for an HA cluster. While testing HA failover, the administrator notices that some of the switches in the network continue to send traffic to the former primary device What can the administrator do to fix this problem?

A.
Verify that the speed and duplex settings match between me FortiGate interfaces and the connected switch ports
Answers
A.
Verify that the speed and duplex settings match between me FortiGate interfaces and the connected switch ports
B.
Configure set link -failed signal enable under-config system ha on both Cluster members
Answers
B.
Configure set link -failed signal enable under-config system ha on both Cluster members
C.
Configure remote Iink monitoring to detect an issue in the forwarding path
Answers
C.
Configure remote Iink monitoring to detect an issue in the forwarding path
D.
Configure set send-garp-on-failover enables under config system ha on both cluster members
Answers
D.
Configure set send-garp-on-failover enables under config system ha on both cluster members
Suggested answer: B

Explanation:

Virtual MAC Address and Failover

- The new primary broadcasts Gratuitous ARP packets to notify the network that each virtual MAC is now reachable through a different switch port.

- Some high-end switches might not clear their MAC table correctly after a failover - Solution: Force former primary to shut down all its interfaces for one second when the failover happens (excluding heartbeat and reserved management interfaces):

#Config system ha

set link-failed-signal enable

end

- This simulates a link failure that clears the related entries from MAC table of the switches.

asked 18/09/2024
Chukwuebuka Ogbonna
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