I have a series of router connected R1 connected to R2 via switch. R3 is connected to R2 via T1. when I ping a loopback addres from R1 to R3 its working. I issue traceroute command from R1 to the same loopback, its not working. Interface bet R1 and R2 are pingable. Sh ip route from R1 to loopback address, it shows R2 int. as next hop. Traceroute is not prohibited to these routers. What could be the possible caused? thanks,
I have this problem too.