While many of our customers do have their Exchange nodes well connected some are asking: Can we put the second node of our DAG into a location where we have a hughe TCP round trip time?
The answer is: Yes and No. It depends? This was the answer you are searching for, right?
From a supportability perspective 500ms round trip time is the maximum supported value.
So now it is your decision to install the Node or not. BTW: An easy way to figure out the round trip time is to use pathping or ping. But hey – is ICMP only really the right thing to measure the round trip time?
Your EXGuru – aka Peter Forster – aka Satschent Peter