06-07-2008 06:27 AM - edited 03-05-2019 11:29 PM
hi all,
how we can check if serial interface is passing traffic or not?
06-07-2008 06:38 AM
Mahesh
1) "sh ip int br" will show you whether the interface is up/up
2) "sh int s0/0" will show many packets are being received and transmitted.
3) Try pinging something that is reachable via the serial interface.
Jon
06-07-2008 06:50 AM
Hi
this is stat of int
Serial1/0 is up, line protocol is up
Hardware is M4T
Description: T1 Glaxo link Centennial
Internet address is 10.39.1.21/30
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Restart-Delay is 0 secs
CRC checking enabled
Last input 00:00:01, output 00:00:02, output hang never
Last clearing of "show interface" counters 00:25:17
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, 1 packets/sec
749 packets input, 80980 bytes, 0 no buffer
Received 177 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1519 packets output, 149171 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up
how can we chek from here
06-07-2008 07:00 AM
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 1 packets/sec
at the moment there is no traffic passing thru serial interface as u can see no data.
Rate if this helps!!!
06-07-2008 07:01 AM
i did ping to some ips
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 1 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
1072 packets input, 114662 bytes, 0 no buffer
Received 261 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
2243 packets output, 218569 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up
still it shows above so no data is passing right??
06-07-2008 09:23 AM
Mahesh
From this router can you ping the other end of the link ie.
ping 10.39.1.22
Jon
06-07-2008 07:59 AM
To verify if traffic is passing over serial interface
sh ip interface serial0/0
extended ping
sh ip int serial0/0
also sh controller serial0/0
06-07-2008 09:36 AM
Hi,
Here's the counter before PING -
749 packets input, 80980 bytes, 0 no buffer
1519 packets output, 149171 bytes, 0 underruns
Here's after PING -
1072 packets input, 114662 bytes, 0 no buffer
2243 packets output, 218569 bytes, 0 underruns
There is an increase in received and transmitted packets which proves that traffic is passing through the interface.
Do a continuous ping to some device connected across the serial interface and keep track of the above lines from the show interface output.
If you see the count increasing then the traffic is passing through that particular interaface.
-> Sushil
06-07-2008 12:26 PM
Mahesh
I was going to make the same point that Sushil makes about the counters in an earlier post showing:
749 packets input, 80980 bytes, 0 no buffer
Received 177 broadcasts, 0 runts, 0 giants, 0 throttles
1519 packets output, 149171 bytes, 0 underruns
and a later post showing that the input counter and the output counter and the broadcast counter had gone up.
1072 packets input, 114662 bytes, 0 no buffer
Received 261 broadcasts, 0 runts, 0 giants, 0 throttles
2243 packets output, 218569 bytes, 0 underruns
That would seem to indicate that the interface was passing data.
Another test would be to do a traceroute to the IP on the other end of the interface or to some destination reachable through the interface and see if the next hop address on the first hop is the address on the other end of the connection.
Perhaps it would help us if you can explain why you are asking this. Is there some problem that suggests that the interface is not working?
HTH
Rick
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