Код:

@echo off
cls
setlocal enabledelayedexpansion

echo go > go.log

for /f "tokens=*" %%a in (go.txt) do call:label "%%a"
goto:eof

:label
for /f "tokens=4 delims=: " %%i in ('ping -n 1 %~1^| findstr /r /c:" [0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*:"') do (
echo route add %%i 192.168.84.1 >> go.log
route add %%i 192.168.84.1
echo route add %%i 192.168.84.1
)