a = "3ffe:1::/24" b = "3ffe:2::/24" l = "3ffe::1" p = "3ffe:100::1" flow esp out from 3ffe:1::/24 to 3ffe:2::/24 local 3ffe::1 peer 3ffe:100::1 type require flow esp in from 3ffe:2::/24 to 3ffe:1::/24 local 3ffe::1 peer 3ffe:100::1 type require