flow ah out from 3ffe:1::1 to 3ffe:3::/24 peer 3ffe:2::1 srcid host1.one.net dstid host2.two.net type require flow ah in from 3ffe:3::/24 to 3ffe:1::1 peer 3ffe:2::1 srcid host1.one.net dstid host2.two.net type require