In Cisco SD-WAN, when setting the OMP graceful restart timer, the IPsec rekey timer must be set to at least twice the OMP graceful restart interval.
• OMP graceful restart = 24 hours
• Required IPsec rekey timer = 2 × 24 = 48 hours
This ensures that IPsec tunnels remain valid long enough during the OMP restart window to prevent tunnel teardown.
The default OMP graceful restart value is 12 hours and can be set to a maximum of 604,800 seconds, which is equivalent to 7 days. The IPsec rekey timer is set to 24 hours by default, and although both timers are configurable, the IPsec rekey timer must be at least two times the value of the OMP graceful restart timer.
https://rafaesil.medium.com/ccie-ep-16-def-sd-wan-self-efficiency-experience-sec-65c6d4412733#:~:text=The%20default%20OMP%20graceful%20restart,the%20OMP%20graceful%20restart%20timer.
Answer shold be D
upvoted 1 times
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