Chaque « U » signifie qu’un paquet « destination inaccessible » a été recu.  U : Unreachable

Hello,can you post the result of the "show logg" command ?also how many routers do you have in your site ? if two are they connected directley with a cable or to a switch ?The problem could be due to a WAN link issue. Best regards,

Hello, Did you entered the command ip nat inside / ip nat outside ? Best regards,