ipkeep

stage1

---------------------------------------------------------------------
| Node1          | Node2          | .....          | Nodex          |
|                |                |                |                |
| ipkeep(Leader) | ipkeep(waiting)| ipkeep(waiting)| ipkeep(waiting)|
| 10.68.3.4(vip) |                |                |                |
|                |                |                |                |
|                |                |                |                |
---------------------------------------------------------------------

stage2 (Node1 failed)

---------------------------------------------------------------------
| Node1          | Node2          | .....          | Nodex          |
|                |                |                |                |
| ipkeep(down)   | ipkeep(Leader) | ipkeep(waiting)| ipkeep(waiting)|
|    failed      | 10.68.3.4(vip) |                |                |
|                |                |                |                |
|                |                |                |                |
---------------------------------------------------------------------