Hello
I have a cisco 3660 with a NM-4T module installed and 2 serial modems are conected.
I changed the IOS, after reload the both serial ports Line protocol went down, ( I test the IOS before without any problem).
I changed back the IOS to originalone and reload, but the Line protocol on serial interfaces are still down. I tested the modems with a AS5350 serial interfaces and line protocol came up and works.
I got many carrier transist on serial interfaces : Router#sh int s1/0 Serial1/0 is up, line protocol is down Hardware is M4T Internet address is 10.2.3.4/24 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation PPP, crc 16, loopback not set Keepalive set (10 sec) LCP Listen Closed: LEXCP, BRIDGECP, IPCP, CCP, CDPCP, LLC2, BACP Last input 00:00:01, output 00:00:01, output hang never Last clearing of "show interface" counters 00:43:33 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: weighted fair Output queue: 0/1000/64/0 (size/max total/threshold/drops) Conversations 0/1/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) Available Bandwidth 1158 kilobits/sec 5 minute input rate 0 bits/sec, 2 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 6485 packets input, 75226 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 3895 packets output, 46748 bytes, 0 underruns 0 output errors, 0 collisions, 1306 interface resets 0 output buffer failures, 0 output buffers swapped out 1306 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up
the serial config is same as before, no changes. does my NM-4T damaged ?
any reply helps me.
Reza