No IP connection between RPA and VNX/CLARiiON array

Hi All,

After changing the login credentials on a VNX array, the RecoverPoint started complaining about the IP connection between  the RPA and the VNX array.

RPA 4.1.0

VNX Block-05.32.000.5.221 File-7.1.80.7

I found an article in the support site (Knowledge Base Article: 000470762), which says I need to detach all RPAs from the cluster make changes to the globalsystemconfig.XML file and then reattach the RPAs back.

I have few questions:

What are the risks involved in doing so?

Also will I loose the journals and therefore the bookmarks.

How long resync time I am looking at? The entire data is about 50TB and the link is 400Mb/s between the two sites.

Thanks.

Bobby