Configuring IKE Phase 1
After you plan for IKE and IPSec and verify the router's current configuration, it is time to implement IPSec. You can always use the show running-config to verify a router's current configuration. Another good command is show access-lists. You use this command because you need to ensure that your current ACLs are not blocking IPSec protocols.
Prior to implementing IKE and IPSec, you fully plan the implementation.
 | The goal of planning for IKE Phase 1 is to minimize potential misconfigurations. |
 | Encapsulating Security Payload ... |
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