Updated Known issues and solutions (markdown)

Known-issues-and-solutions.md

@@ -30,5 +30,5 @@ VPN client usually provides some way to let you route your traffics through the
 
 Usually you can avoid traffic loop by adding a route exception, for example on linux:
 ```
-ip route add ${exception_ip} via ${default_network_gateway}
+ip route add ${udp2raw_server_ip} via ${default_network_gateway}
 ```