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Serial interface - leased line connection

Dear all,

I have a leased line between 2 site A & B. Both i already pre-configure but when i test, i can't ping between the 2 interface.

What could be the problem. I saw that the B interfece is (looped), what does it mean? Both serial interface i already connected to the modem/NTU

Site A (klcc)

Serial0/1/0 is up, line protocol is down

  Hardware is GT96K Serial

  Description: Connect to OU Router

  Internet address is 172.16.3.1/30

  MTU 1500 bytes, BW 512 Kbit/sec, DLY 20000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation HDLC, loopback not set

  Keepalive set (10 sec)

  Last input never, output 00:00:03, output hang never

  Last clearing of "show interface" counters never

  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

     0 packets input, 0 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

     799 packets output, 19176 bytes, 0 underruns

     0 output errors, 0 collisions, 1727 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

     53 carrier transitions

     DCD=up  DSR=up  DTR=up  RTS=up  CTS=up

Site B (OU)

Serial0/0/0 is up, line protocol is up (looped)

  Hardware is WIC MBRD Serial

  Description: Connection to KLCC Router

  Internet address is 172.16.3.2/30

  MTU 1500 bytes, BW 512 Kbit/sec, 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 00:00:00, output hang never

  Last clearing of "show interface" counters never

  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

     15 packets input, 1664 bytes, 0 no buffer

     Received 15 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     15 packets output, 1664 bytes, 0 underruns

     0 output errors, 0 collisions, 5 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions

     DCD=up  DSR=up  DTR=up  RTS=up  CTS=up


1 Accepted Solution

Accepted Solutions

A loop is generated towards site B.It is not from your Site A or Site B modem, because both end serial is up.Co-ordinate with your service provider regarding the loop.I think a loop is generated from service provider end only .Please reply after doing the troubleshooting.

View solution in original post

4 Replies 4

guys,

help me out here. any idea

A loop is generated towards site B.It is not from your Site A or Site B modem, because both end serial is up.Co-ordinate with your service provider regarding the loop.I think a loop is generated from service provider end only .Please reply after doing the troubleshooting.

Hi Soumik,

i get the isp to com to check. i'll reply later

it seem that the isp already rectified the problem is at their end. tq so much