Cannot Ping Between Two Routers

[mgai6966]

I have two 2501 routers connected back to back via DCE/DTE cable. On both routers the serial line is up and the line protocol is up. I have the clock rate set on the DCE side, and I still cannot ping between the two routers. If I change the encapsulation from HDLC to PPP I can ping, but when I add in another router configure it and configure a routing protocol I still cannot ping. I have done this over and over again and I am stuck. Below is the configuration for the two back to back routers.

Router_B>en
Router_B#sh int s0
Serial0 is up, line protocol is up
Hardware is HD64570
Internet address is 192.168.20.1/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:02, output hang never
Last clearing of "show interface" counters 00:32:27
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
196 packets input, 12227 bytes, 0 no buffer
Received 196 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
189 packets output, 11690 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
0 output buffer failures, 0 output buffers swapped out
35 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

Router_C>en
Router_C#sh int s0
Serial0 is up, line protocol is up
Hardware is HD64570
Internet address is 192.168.30.1/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:02, output 00:00:09, output hang never
Last clearing of "show interface" counters 00:31:57
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
188 packets input, 11183 bytes, 0 no buffer
Received 188 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
203 packets output, 13133 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 output buffer failures, 0 output buffers swapped out
1 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

 

[tecnikall]

you may have to change the ip addresses as the interfaces are on different subnets or you may have to use a routing protocol....

 

[chieftan999]

As already said you have two seperate subnets:-

192.168.20.1 / 24
192.168.30.1 / 24

You need the two interfaces on the same subnet:-

as follows:-

192.168.20.1 / 24
192.168.20.2 / 24

Hope this helps