Comment 2 for bug 1657090

Hi Michael, I'm so sorry for returning so late.

The description here may be so simple and looked as outsider wrote(Yes, i am. :)). I descripe this more details.

As in the real life, the upstream banding is very expensive for ISP or other organization. So if the vip is very popular for users, such as the large scale web portals. Thousands of people are free to access it. If there are some download/upload services supported, the upstream bandwith will be excessive consumped. Also, a connection may get the most of the bandwidth.So we should limit the vip bandwidth, and verify not consume the public internet bandwidth too much..

Why limit vip:

As there are many servers(backends) related with this vip. We do not need the limitation on every server's port. We only do that on the vip which is the entrance. It may more simple for cloud product, i think.