Well studying for my NSX 6.2 exams, I found that there were some confusing over dead time value and polling interval for NSX edge HA. While doing my NSX class I asked my instructor about it and he clarified the following:
In NSX Edge HA configuration (as of 6.3) :-
- Default Declare dead time is 15 seconds
- The minimum acceptable value 9 seconds, anything below 9 seconds will not work
- The polling interval is 1 seconds
You can see the polling interval by running “debug packet” commands in the edge.
How does the dead time value impact connectivity? As a quick test, I have a machine pinging another machine behind the Edge HA.
Dead time = 15 seconds –> 11 ping time out
Dead time = 9 seconds –> 4 pings time out