Hi Rishi,
I didn't use any command.
After renewal of the certificate, I had restarted the SAPROUTER service in services.msc.
Then I checked the rfc connections. It is not working.
So, once I restarted the server also but the rfc's are not working.
I checked the router status like this:
I have checked whether am I able to ping the sapserv2 like this:
BR, Sudhir Sadhu