Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Drops traffic on both WAN interfaces when reconfiguring.

I had high hopes for the FVX538, a relatively cheap router with failover support! After several months of trying to make it work (upgrading firmware, reading the manual, etc) I ended up going with pfSense on a rackmount server.My main issue with the FVX538 is that it would drop all traffic going over both WAN interfaces for about a minute, even when making seemingly trivial changes like updating DNS.