881 router A has GRE tunnels to three other routers across internet (B, C, D) . All were working fine. Yesterday, router A began exhibiting problem communicating with the other segments over the tunnels: Packets began to be dropped tunnels became unu...

Subnet 192.168.203.0/24 is connected to a 1900 series router. Inside the segment, there is also a Windows server (192.168.203.248) running RRAS that has 192.168.3.0/24 connected to its second NIC. RIP is turned on, both at RRAS and at the Cisco. The ...