Welcome.On each of these loopback tests, continue to do loops farther away from the router, as long as you see no input errors. If you see any input errors(clear int s x before doingping tests), then stop there-this is where you are having a failure....
It's possible the router learned the DLCI throughInv-arp before you configured the static mapping,this is why you'll see both dynamic & static entriesfor the same DLCI.Philippe
Aborts mean illegal sequence of one bits- typicallya bad ckt, CSU/DSU, or sending interface on remote router.I would do loopback testing w/ HDLC encapsulationto try to isolate where the failure is.1- clear int serial x2- put local loop on csu/csu bac...
One thing you could do to see if your fractional T1is up, and do a show int serial x, x= serial port that is connected to the circuit.from router config mode:router # clear int serial xrouter # show int serial xif serial x up, line protocol up, then ...