When I was implementing ISDN network 5years ago with 2503 as back-up network; primary was frame-relay, I experienced such a problem so many times. But only the causes to run abnormal was switch problem such TDX1b or TDX10. At that times TDX network w...
Yes, it sounds like a hard problem.How big size packet did you ping?Have you ever excute traceroute for destination?But we will find the way to solve this problem. I had managed frame-relay network for years. But there was not the problem couldn't so...