RE: Polling for new WG I-Ds

["Bryskin, Igor" <ibryskin@movaz.com>]

> 
> JD:  Except that we go to great pains to ensure that this 
> situation never occurs. 
> 
> You are right, we do. In theory such situations should not 
> happen, however, we all know that in practice there are 
> always cases when original (especially proprietary) protocol 
> solutions are not thought through enough, and it is 
> impossible to maintain backward compatibility between the 
> software releases. That's why I am talking about *major* 
> upgrades. Furthermore, sometimes there is a need to actually 
> downgrade software, for instance, when one wants to add to 
> the network some older equipment.

Why would anyone want to do this, especially without upgrading this
equipments' software?

IB>> Because the new software was developed on the assumption that it will work on the new hardware. Your customer, on the other hand, purchased your old equipment and you want to protect his investment.

> Again, the ability to do 
> the CP->MP->CP trick would help

Except that, as Lyndon and Deborah pointed out, the CP->MP->CP trick has
perils of its own.

IB>> Except that they were not specific what those perils are.

Igor