flow esp out proto etherip from 1.1.1.1 to 2.2.2.2 peer 2.2.2.2 type require
flow esp in proto etherip from 2.2.2.2 to 1.1.1.1 peer 2.2.2.2 type require
flow esp out proto etherip from 2.2.2.2 to 3.3.3.3 peer 3.3.3.3 type require
flow esp in proto etherip from 3.3.3.3 to 2.2.2.2 peer 3.3.3.3 type require
flow esp out proto esp from 4.4.4.4 to 5.5.5.5 peer 5.5.5.5 type require
flow esp in proto esp from 5.5.5.5 to 4.4.4.4 peer 5.5.5.5 type require
flow esp out proto esp from 6.6.6.6 to 7.7.7.7 peer 7.7.7.7 type require
flow esp in proto esp from 7.7.7.7 to 6.6.6.6 peer 7.7.7.7 type require