Thanks for responding,
The CS2100 is an enterprise solution, based on the CS2000 aka CVM geo-redundant (greenfield/hybrid) solution. The research I've collected identifies the CS2000 geo-redundant solution with 2 8600 HA, with a hitless upgrade. From what I gathered, in the carrier space, the Geo-redundant hybrid (compact call agent) solution that have MC blades use only 2 8600's HA, and still keeps the 5 9's reliabilty.
This CVM Geo redundant engineered solution is outlined in the Nortel Carrier SEB's (Sales eng. bulletins). The Enterprise CS2100 has it's own SEB's outlining their approach to 5'9's reliablity. The 4 router geo solution is not supported in the Carrier space but is supported in the Enterprise space. I don't understand why Enterprise geo solution uses a different approach (4 8600 Single cpu vs 2 HA 8600's), as the Enterprise CS2100 geo compact hybrid is based on the Carrier CS2000 geo compact hybrid.
Seems to me the more components (8600's) you have, the more difficult it is to engineer a cookie cutter solution.
