Nginx node helth check

Hi !
We currently use NginX as a L4 switch.
We have 1 single Upstream VIP which has 2 real nodes of Apache web
If all nodes under the VIP works fine, we always get normal response
the NginX whenever we try ping test from out of IDC.
My question is that, if all nodes under the VIP went down, does ping
test to
the VIP returns failure ?


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