My network has a bouncing frame relay circuit. Every time our link takes a hit, we call the carrier and they would perform a stress test for that bouncing circuit and all they say after the stress test is, "there where no errors found". They told me that they used intrusive and passive tests. I really dont know what these test are, so my questions is,
1) What are the types of test performed on a frame relay circuit?
2) What could be the problem with the bouncing circuit? (Already replaced WAN cable from router to CSU/DSU, router configurations are all good and no extended demarc)
3) What troubleshooting approach should i do to isolate the problem?
Usually after the stress testing, circuit would be up and running pretty well for 2-3days. Then the circuit goes bad again after that. seen lots of crc and input errors on the serial interface btw.