Shared bandwidth allows multiple EIPs to share the same bandwidth. All ECSs, BMSs, and load balancers that have EIPs bound in the same region can share a bandwidth.
When you host a large number of applications on the cloud, if each EIP uses an independent bandwidth, a lot of bandwidths are required, which significantly increases bandwidth costs. If all EIPs share the same bandwidth, you can lower bandwidth cost and easily perform system O&M.
You can assign, modify, delete a shared bandwidth, and add or remove EIPs to or from a shared bandwidth.
Shared data package provides a quota for data usage. Such packages are cost-effective and easy to use. Shared data packages take effect immediately after your purchase. If you have subscribed to pay-per-use EIPs using bandwidth billed by traffic in a region and buy a shared data package in the same region, the EIPs will use the shared data package. After the package quota is used up or the package expires, the EIPs will continue to be billed on a pay-per-use basis.
Two types of packages are available: dynamic BGP and static BGP. Dynamic BGP data packages will be used by dynamic BGP EIPs, and static BGP data packages will be used by static BGP EIPs.
Shared data packages can be purchased yearly or monthly. Packages purchased for a year are more cost effective. You can purchase multiple shared data packages. The data package with the shortest validity period will be used first.