-You will only require this functionality if you are
-"well-connected". What that means is that you are connected to several
-different parts of (say) the EU cluster and, at the same time, also
-connected to two or three places in the US which, in turn are
-connected back to the EU. This is called a "loop" and if you are
-seriously looped then you need filtering.
+To put it simply, you should not mix Isolation and Route Filtering. It
+will work, of sorts, but you will not get the expected results. If you
+are using Isolation sucessfully at the moment, do not get involved in
+Route Filtering unless you have a good supply of aspirin! Once you have
+started down the road of Route Filtering, do not use Isolation either.
+Use one or the other, not both.
+
+<p>
+You will only require this functionality if you are "well-connected". What
+that means is that you are connected to several different parts of (say)
+the EU cluster and, at the same time, also connected to two or three places
+in the US which, in turn are connected back to the EU. This is called a
+"loop" and if you are seriously looped then you need filtering.