I have multiple remote routers with the same type of ISDN backup
setup. I have one that will not go UP, UP when doing a Show Int. What
dictates if Line Protocol is UP? (See Sh Int below.
#sh int s4/0
Serial4/0 is up, line protocol is down
Hardware is cxBus Serial
Internet address is 192.168.254.29/27
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, crc 16, loopback not set
Keepalive set (10 sec)
Restart-Delay is 0 secs
LCP Closed
Closed: IPCP, CDPCP
Last input 00:00:08, output 18:55:50, output hang never
Last clearing of "show interface" counters 22w3d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
0Queueing 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 48 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 2322 packets input, 53834 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 1856 packets output, 38512 bytes, 0 underruns 0 output errors, 0 collisions, 500 interface resets 0 output buffer failures, 0 output buffers swapped out 4 carrier transitionsRTS up, CTS up, DTR up, DCD up, DSR up