flow esp out from 3ffe:1::1 to 3ffe:2::2 peer 3ffe:2::2 srcid host1.one.net dstid host2.two.net type require flow esp in from 3ffe:2::2 to 3ffe:1::1 peer 3ffe:2::2 srcid host1.one.net dstid host2.two.net type require