According to SAFE IPSec VPN, which of these are recommended design guidelines for
maintaining high availability? (Select three.)

A.
Cisco recommends running IKEkeepalives in combination with routing protocols for resilience to
assist in keeping the state current.

B.
Regardless of the high-availability mechanism chosen, aheadend device should not be
deployed in a configuration that results in CPU utilization higher than 50 percent after failure.

C.
When using VPN routers at theheadend, use IKE keepalives for high availability.

D.
Regardless of the high-availability mechanism chosen, aheadend device should not be
deployed in a configuration that results in CPU utilization higher than 75 percent after failure.

E.
Cisco does not recommend running IKEkeepalives in combination with routing protocols for
resilience to assist in keeping the state current.

F.
When using VPN Concentrators or VPN firewalls at theheadend, use IKE keepalives for high
availability.