Hello,I have two cisco 2811 (Version 15.1(4)M3) connected using cross-over cable with two PCs connected on the outside interfaces (Windows 7 - firewall disabled).PC1<-----Rj-45------>Fa0/0(R1)Fa0/1<---cross-over------->F0/1(R2)Fa0/0<-------------Rj-4...