To test a looped line change your encapsulation from Frame Relay to HDLC. You can then ping the ip address of your own interface. The CSU/DSU may have the ability to loopback to the router. You might also wish to create a loopback plug to use at the Telco side of the CSU/DSU. Also consider a loopback plug/jack to use at the cable end where the telephone company's demark point is located. The cable between the CSU/DSU and the demark may be defective. Try different bit patterns in the pings - you can create them if you used extended ping. All ones Oxffff, all zeros Ox0000, alternating ones and zeros 0xaaaa. Check CCO for several pages: One is troubleshooting serial lines, http://www.cisco.com/warp/public/112/chapter15.htm the other troubleshooting T-1s - you'll have to find the URL.
> -----Original Message----- > From: Md Nazri [mailto:[EMAIL PROTECTED] > Sent: Friday, August 22, 2003 7:21 PM > To: [EMAIL PROTECTED] > Subject: Input errors & interface reset [7:74269] > > > hi all, > > we have one frame relay link to customer with the following connection > > router -----csu/dsu(lease line)--------frame relay node/cloud > > the problem is on serial0/0(connected to csu/dsu) the input errors and > interface reset is increasing tremendously, ping test > resulted in 6 packets > dropped out of 1000. > service provider isolation test on the lease line found no > error detected. > then we did a loopback on csu/dsu facing router, the result > is as below, > where > after a while we still receive input errors and interface reset. > > could it be because router problem or csu/dsu..? > prompt response needed since this customer is currently > running on ISDN > backup. > > thanks > > CustomerA#sh int s0/0 > Serial0/0 is up, line protocol is down (looped) > Hardware is PowerQUICC Serial > MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec, > reliability 254/255, txload 1/255, rxload 1/255 > Encapsulation FRAME-RELAY, loopback not set > Keepalive set (10 sec) > LMI enq sent 5, LMI stat recvd 0, LMI upd recvd 0, DTE LMI down > LMI enq recvd 5, LMI stat sent 0, LMI upd sent 0 > LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE > Broadcast queue 0/64, broadcasts sent/dropped 0/0, > interface broadcasts 0 > Last input 00:00:04, output 00:00:04, output hang never > Last clearing of "show interface" counters 00:00:50 > 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 0/255/256 (active/max active/max total) > Reserved Conversations 0/0 (allocated/max allocated) > Available Bandwidth 96 kilobits/sec > 5 minute input rate 0 bits/sec, 0 packets/sec > 5 minute output rate 0 bits/sec, 0 packets/sec > 5 packets input, 70 bytes, 0 no buffer > Received 0 broadcasts, 0 runts, 0 giants, 0 throttles > 1 input errors, 0 CRC, 1 frame, 0 overrun, 0 ignored, 0 abort > 5 packets output, 70 bytes, 0 underruns > 0 output errors, 0 collisions, 1 interface resets > 0 output buffer failures, 0 output buffers swapped out > 0 carrier transitions > DCD=up DSR=up DTR=up RTS=up CTS=up > > CustomerA#sh int s0/0 > Serial0/0 is up, line protocol is down (looped) > Hardware is PowerQUICC Serial > MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec, > reliability 251/255, txload 1/255, rxload 1/255 > Encapsulation FRAME-RELAY, loopback not set > Keepalive set (10 sec) > LMI enq sent 6, LMI stat recvd 0, LMI upd recvd 0, DTE LMI down > LMI enq recvd 6, LMI stat sent 0, LMI upd sent 0 > LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE > Broadcast queue 0/64, broadcasts sent/dropped 0/0, > interface broadcasts 0 > Last input 00:00:05, output 00:00:05, output hang never > Last clearing of "show interface" counters 00:01:01 > 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 0/255/256 (active/max active/max total) > Reserved Conversations 0/0 (allocated/max allocated) > Available Bandwidth 96 kilobits/sec > 5 minute input rate 0 bits/sec, 0 packets/sec > 5 minute output rate 0 bits/sec, 0 packets/sec > 6 packets input, 84 bytes, 0 no buffer > Received 0 broadcasts, 0 runts, 0 giants, 0 throttles > 2 input errors, 0 CRC, 2 frame, 0 overrun, 0 ignored, 0 abort > 6 packets output, 84 bytes, 0 underruns > 0 output errors, 0 collisions, 2 interface resets > 0 output buffer failures, 0 output buffers swapped out > 0 carrier transitions > DCD=up DSR=up DTR=up RTS=up CTS=up > > CustomerA#sh int s0/0 > Serial0/0 is up, line protocol is down (looped) > Hardware is PowerQUICC Serial > MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec, > reliability 252/255, txload 1/255, rxload 1/255 > Encapsulation FRAME-RELAY, loopback not set > Keepalive set (10 sec) > LMI enq sent 12, LMI stat recvd 0, LMI upd recvd 0, DTE LMI down > LMI enq recvd 12, LMI stat sent 0, LMI upd sent 0 > LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE > Broadcast queue 0/64, broadcasts sent/dropped 0/0, > interface broadcasts 0 > Last input 00:00:06, output 00:00:06, output hang never > Last clearing of "show interface" counters 00:02:02 > 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 0/255/256 (active/max active/max total) > Reserved Conversations 0/0 (allocated/max allocated) > Available Bandwidth 96 kilobits/sec > 5 minute input rate 0 bits/sec, 0 packets/sec > 5 minute output rate 0 bits/sec, 0 packets/sec > 12 packets input, 168 bytes, 0 no buffer > Received 0 broadcasts, 0 runts, 0 giants, 0 throttles > 3 input errors, 0 CRC, 3 frame, 0 overrun, 0 ignored, 0 abort > 12 packets output, 168 bytes, 0 underruns > 0 output errors, 0 collisions, 4 interface resets > 0 output buffer failures, 0 output buffers swapped out > 0 carrier transitions > DCD=up DSR=up DTR=up RTS=up CTS=up > > > (Friday) > **Please support GroupStudy by purchasing from the GroupStudy Store: > http://shop.groupstudy.com > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=74275&t=74269 -------------------------------------------------- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
