Hi,
I have a virtual network on Azure with a site-2-site VPN tunnel to on premise. On premise VPN device is a Windows 2012 Server. This setup mostly works, but from time to time I get black hole router syndrome.
The tunnel is up. Normal ping works, however if I try on an Azure VM:
ping -f -l 1472 on.premise.server.ip
I get "Request timed out". If I try from an on premise server "ping -f -l 1472 on.azure.server.ip" everything is OK. This problem is not permanent. Everything worked just fine yesterday, but today it does not.
Does anybody know how to solve this?
Regards,
Hugo
