flow ah out from 3ffe:4::/16 to 3ffe:3::/24 peer 3ffe::2 srcid host1.one.net dstid host2.two.net type require
flow ah in from 3ffe:3::/24 to 3ffe:4::/16 peer 3ffe::2 srcid host1.one.net dstid host2.two.net type require