Thanks Spio, I've cleared the counters for "show int" and noticed that the input errors are showing up on the 7200 and not on the 7500 which might make things a bit clearer, the counters hadn't been cleared since installation so the 7500 input errors might have been from when it was first brought online. I've also included the output from the "show controllers" command if you wouldn't mind having a look for me, although I didn't get much output from the "show controllers" command on the 7500.
Thanks again for your help! Mark. 7200 Serial4/0 is up, line protocol is up Hardware is M1T-T3 pa Description: NOC01-DS3-MAN01 Internet address is ***.***.***.***/30 MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, reliability 255/255, txload 22/255, rxload 7/255 Encapsulation HDLC, crc 16, loopback not set Keepalive set (10 sec) Restart-Delay is 0 secs Last input 00:00:00, output 00:00:00, output hang never Last clearing of "show interface" counters 00:07:55 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 1381000 bits/sec, 1721 packets/sec 5 minute output rate 3917000 bits/sec, 1590 packets/sec 802887 packets input, 84321394 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 parity 6238 input errors, 6041 CRC, 0 frame, 19 overrun, 0 ignored, 178 abort 741267 packets output, 223596220 bytes, 0 underruns 0 output errors, 0 applique, 0 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions rxLOS inactive, rxLOF inactive, rxAIS inactive txAIS inactive, rxRAI inactive, txRAI inactive NOC01#sho controllers s4/0 M1T-T3 pa: show controller: PAS unit 0, subunit 0, f/w version 2-56, rev ID 0x2800001, version 3 idb = 0x619FE658, ds = 0x61A00158, ssb=0x61A00430 Clock mux=0x30, ucmd_ctrl=0x0, port_status=0x1 Serial config=0x8, line config=0x1B0202 maxdgram=4584, bufpool=128Kb, 256 particles rxLOS inactive, rxLOF inactive, rxAIS inactive txAIS inactive, rxRAI inactive, txRAI inactive line state: up cable type : T3 cable, received clockrate 44202795 base0 registers=0x3E000000, base1 registers=0x3E002000 mxt_ds=0x61F6A72C, rx ring entries=128, tx ring entries=256 rxring=0xF1A3940, rxr shadow=0x61A01C34, rx_head=99 txring=0xF271140, txr shadow=0x61A02260, tx_head=77, tx_tail=77, tx_count=0 throttled=0, enabled=0 rx_no_eop_err=253, rx_no_stp_err=0, rx_no_eop_stp_err=0 rx_no_buf=0, rx_soft_overrun_err=0, dump_err= 1, bogus=0, mxt_flags=0x2C tx_underrun_err=0, tx_soft_underrun_err=0, tx_limited=0(256) tx_fullring=10077, tx_started=35856555 Framing is c-bit, Clock Source is Line Bandwidth limit is 44210, DSU mode 0, Cable length is 10 rx FEBE since last clear counter 1, since reset 226 Data in current interval (18 seconds elapsed): 398 Line Code Violations, 120 P-bit Coding Violation 120 C-bit Coding Violation 17 P-bit Err Secs, 0 P-bit Sev Err Secs 0 Sev Err Framing Secs, 0 Unavailable Secs 17 Line Errored Secs, 17 C-bit Errored Secs, 0 C-bit Sev Err Secs Total Data (last 1 15 minute intervals): 16278 Line Code Violations, 5140 P-bit Coding Violation, 5107 C-bit Coding Violation, 885 P-bit Err Secs, 0 P-bit Sev Err Secs, 0 Sev Err Framing Secs, 12 Unavailable Secs, 889 Line Errored Secs, 885 C-bit Errored Secs, 0 C-bit Sev Err Secs No alarms detected. 7500 MAN01#sho int s0/0/0 Serial0/0/0 is up, line protocol is up Hardware is cyBus PODS3 Serial Description: MAN01-DS3-NOC01 Internet address is ***.***.***.***/30 MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, reliability 255/255, txload 7/255, rxload 22/255 Encapsulation HDLC, crc 16, 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 00:07:46 Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 3905000 bits/sec, 1576 packets/sec 5 minute output rate 1369000 bits/sec, 1722 packets/sec 724700 packets input, 218412581 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 parity 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 790994 packets output, 82205471 bytes, 0 underruns 0 output errors, 0 applique, 0 interface resets 0 output buffer failures, 0 output buffers swapped out 0 carrier transitions LC=up CA=down TM=down LB=down TA=down LA=down MAN01#sho controller s o/o/o Serial0/0/0 - Mx T3(2) HW Revision 0x3, FW Revision 3.9 Framing is c-bit, Clock Source is Line Bandwidth limit is 44210, DSU mode 0, Cable length is 10 Data in current interval (789 seconds elapsed): 0 Line Code Violations, 0 P-bit Coding Violation 0 C-bit Coding Violation 0 P-bit Err Secs, 0 P-bit Sev Err Secs 0 Sev Err Framing Secs, 1 Unavailable Secs 0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=65496&t=65491 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]