I'm in the process of converting a Omegamon Hub to become Highly Available. I'm reading more into DVIPA and wanted to know what's the best practice for the following statements, DVIPADYNAMIC, DVIPADEFINE, DVIPARANGE. We'll be running a single instance of OMEGAMON Hub with the started task name OMEGHAH. We'll move the started task as one LPAR goes down.

• LPARB (Acting distributor) - All the VIPA statements reside here for other started tasks. 
• LPARA (Preferred Primary for Omegamon hub)
• LPARC

Do we need the following statement in each TCPIP stack?

DYNAMICXCF x.x.x.a  255.255.255.0 1 
SYSPLEXROUTING                             

VIPADYNAMIC
 VIPADEFINE 255.255.255.0 x.x.x.V
 VIPADISTRIBUTE DEFINE DISTM HOTSTANDBY x.x.x.V
PORT xxx DESTIP
x.x.x.b  - LPAR1
 x.x.x.a - LPAR2

x.x.x.c - LPAR3
ENDVIPADYNAMIC

I would like to know more about VIPARANGE. Could you provide more details on VIPARANGE and some use case scenario?