My Cisco Lab Woes

Well i tested all of the cables in one of the links that worked and all worked fine.

I'll maybe do a bit more testing on them but the fact that they've all worked in the same link suggests that it's something else.

The link between Matt and James works if Matt is providing the clocking (and if i swap the cable ends around obviously).

Similarly the link between Matt and Charlie will stop working if charlie is configured to provide the clocking and the DCE / DTE ends swapped around.

It sounds like matt does not allow any one to do clocking but him. From Yes/No table you gave, The working cases only have Matt in the clocking side.

Tell ya what. Let's see if the problem is really on the serial interfaces or if they are related to the whole router. Did you try connecting the ethernet interfaces together. If those also have problems, then there is some thing with the routers hardware I guess.

www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htm

As per cisco documents now it seems the hardware (Charlie router) failure. If you are sure that all the 3 cables are good then the problem is with router and its ports