Configure one side of an IPsec Network Address Translation Traversal (NAT-T) connection as a Responder device. By default, both sides of an IPsec NAT-T connection are initiators.
ipsec responder-only
no ipsec responder-only
The default is initiator.
Logical Interface Configuration
This command does not apply to all hardware platforms. For more information about feature support, see Fabric Engine and VOSS Feature Support Matrix.