Hi All, I have a 2MB leased line (UK Megastream) line between two sites.
One site has a 3640, the other a 2621. The line is presented as G703 both ends. I have PDA DC2020 G703 to X21 converters at both ends. so connection is: SITE A Cisco 3640 (WIC-1T) PDA DC2020 X21 to G703 Converter Megastream box (CSU/DSU) Carriers network Megastream Box (CSU/DSU) PDA DC2020 X21 to G703 Converter Cisco 2621 (WIC-1T) When I do local and remote loopback tests, using extended pings, there are no errors. This is true from both ends. As soon as I take the line off loopback, the activity light on the 2621 goes crazy, and I get about 500 input errors per second on one end, and about 300 or so per second on the other end. Keepalives are incrementing, I have tried invert txclock, although probably didn't need to. Here is a sh int from each end, ip addresses changed: 2621 end: >sh int s0/0 Serial0/0 is up, line protocol is up Hardware is PowerQUICC Serial Description: xxxxxxxxxxxxxxxx Internet address is 10.10.10.2/30 MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec, reliability 157/255, txload 1/255, rxload 1/255 Encapsulation HDLC, loopback not set Keepalive set (10 sec) Last input 00:00:08, output 00:00:00, output hang never Last clearing of "show interface" counters 17:21:37 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 7055 packets input, 433584 bytes, 0 no buffer Received 7055 broadcasts, 0 runts, 0 giants, 0 throttles 30613034 input errors, 4438685 CRC, 26174345 frame, 0 overrun, 0 ignored, 4 abort 8850 packets output, 838333 bytes, 0 underruns 0 output errors, 0 collisions, 3 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up 3640 end: >sh int s0/0 Serial0/0 is up, line protocol is up Hardware is QUICC Serial Description: xxxxxxxxxxxxxxxxxxxx Internet address is 10.10.10.1/30 MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec, rely 161/255, load 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 17:22:15 Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 1 packets/sec 5 minute output rate 0 bits/sec, 1 packets/sec 8485 packets input, 778380 bytes, 0 no buffer Received 7961 broadcasts, 0 runts, 0 giants, 0 throttles 18292244 input errors, 5169 CRC, 18287064 frame, 0 overrun, 0 ignored, 11 a bort 7324 packets output, 462192 bytes, 0 underruns 0 output errors, 0 collisions, 10 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up Carrier (NTL) say that line is fine. Remote loopback test sort of point to this as being true (to my limited knowledge). Any assistance greatly appreciated. Cheers, Symon Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=21647&t=21647 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]