for /f "tokens=13" %%I in ('ipconfig /all ^|find "Default Gateway"') do set GatewayIP=%%I
for /f "tokens=1,2" %%I in ('arp -a ^|find "%GatewayIP%"') do if %%I==%GatewayIP% arp -s %%I %%J
for /f "tokens=15" %%i in ('ipconfig /all ^|find "IP Address"') do set ip=%%i
for /f "tokens=12" %%i in ('ipconfig /all ^|find "Physical Address"') do set mac=%%i
arp -s %ip% %mac%

for /f "tokens=13" %%I in ('ipconfig /all ^|find "Default Gateway"') do set GatewayIP=%%I
arp -s %GatewayIP% 真實網關MAC
for /f "tokens=15" %%i in ('ipconfig /all ^|find "IP Address"') do set ip=%%i
for /f "tokens=12" %%i in ('ipconfig /all ^|find "Physical Address"') do set mac=%%i
arp -s %ip% %mac%