Crc Error Fix T1
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& T3/E3Troubleshoot and AlertsConfiguration Example and TechNotes Troubleshooting Serial Line Problems Download Print Available Languages Download Options PDF (265.5 KB) View with Adobe Reader on a variety of winrar crc error fix devices Updated:Sep 09, 2005 Document ID:14149 Contents Introduction Prerequisites Requirements Components Used Conventions rar crc error fix Troubleshooting Using the show interfaces serial Command Serial Lines: show interfaces serial Status Line Conditions Serial Lines: Increasing Output hdd crc error fix Drops on Serial Link Serial Lines: Increasing Input Drops on Serial Link Serial Lines: Increasing Input Errors in Excess of One Percent of Total Interface Traffic Serial Lines: Troubleshooting Serial Line Input Errors
Crc Error Fix Software
Serial Lines: Increasing Interface Resets on Serial Link Serial Lines: Increasing Carrier Transitions Count on Serial Link Using the show controllers Command Using debug Commands Using Extended ping Tests Performing Ping Tests Troubleshooting Clocking Problems Clocking Overview Clocking Problem Causes Detecting Clocking Problems Isolating Clocking Problems Clocking Problem Solutions Adjusting Buffers Tuning System Buffers Implementing Hold Queue Limits Using Priority Queuing to Reduce Bottlenecks Special idm crc error fix Serial Line Tests CSU and DSU Loopback Tests CSU and DSU Local Loopback Tests for HDLC or PPP Links CSU and DSU Remote Loopback Tests for HDLC or PPP Links Detailed Information on the show interfaces serial Command show interfaces serial Parameters Troubleshooting T1 Troubleshooting Using the show controller t1 Command show controller t1 Conditions Troubleshooting T1 Error Events Verifying that ISDN Switch Type and PRI-Group are Configured Correctly Verifying the Signaling Channel Troubleshooting a PRI Performing Hardware Loopback Plug Test Troubleshooting E1 Troubleshooting Using the show controller e1 Command Troubleshooting E1 Error Events Verifying that ISDN Switch Type and PRI-Group are Configured Correctly Verifying the Signaling Channel Troubleshooting a PRI Related Information Introduction This chapter presents general troubleshooting information and a discussion of tools and techniques for troubleshooting serial connections. The chapter consists of the following sections: Troubleshooting Using the show interfaces serial Command Using the show controllers Command Using debug Commands Using Extended ping Tests Troubleshooting Clocking Problems Adjusting Buffers Special Serial Line Tests Detailed Information on the show interfaces serial Command Troubleshooting T1 Problems Troubleshooting E1 Problems Prerequisites Requirements Readers of this document should be knowledgeable of the following
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T1 Line Code Violations
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Display results as threads More... Useful Searches Recent Posts Menu Forums Forums Quick Links Search Forums Recent Posts Menu Log in Sign up AnandTech Forums: Technology, Hardware, Software, and Deals Forums > Hardware and Technology > Networking > T1 crc & frame https://forums.anandtech.com/threads/t1-crc-frame-errors-ideas.855047/ errors -- ideas? Discussion in 'Networking' started by randal, Jul 28, 2002. randal Golden Member Joined: http://www.gossamer-threads.com/lists/cisco/nsp/50748 Jun 3, 2001 Messages: 1,890 Likes Received: 0 Hey guys, I've got a ptp t-1 that is being weird. It's a Qwest loop, and from what their techs say, it is in good condition -- hard looped both ends and run a couple hours of tests, and it came back clean. Qwest assures me that they do not provide timing on the line. Layout crc error is as follows: Cisco 4500 -- Osicom RouterMate DSU/CSU -------------------Qwest Loop---------------------Adtran TSU100 -- Cisco 2500 The osicom is providing timing, and the adtran is set to network timing. I am using manufactured utp, and Cisco v.35 serial cables on both ends. Problem is this ... the A end (4500) sends the packets on down to the Z end (2500), and the Z end shows lots of CRC & frame errors. In about 5 minutes after a counter clear, I have crc error fix 44 crc and 16 frame input errors. The A end reports no errors at all, incoming or outgoing. I'm running B8ZS & ESF all over, and have verified that the Qwest people are running the same. Anything I should look at or change to try and clear up these errors? Occasionally the line drops completely, and I have to unplug one end, wait a minute, then plug it back in -- it magically comes up after that, but then the errors resume. Ideas? Thanks, randal #1 randal, Jul 28, 2002 L3Guy Senior member Joined: Apr 19, 2001 Messages: 282 Likes Received: 0 The first thing that comes to mind is that Qwest is also furnishing timing, and you are getting timing slips. I know that Qwest isn't supposed to provide timing, but they are a Telco. ( All the bells revel in mediocrity ) I would turn off timing on your box and see if the circuit runs "without timing" (impossible, but ...) The other thing to ask is a CSU loop back, rather than a smart jack loop back. This will test all the way to your router, including your premises wiring. The Telco does not do this unless specifically requested. They tend to test their stuff, and then wash their hands. (The "Not my problem." syndrome) HTH Doug #2 L3Guy, Jul 28, 2002 randal Golden Member Joined: Jun 3, 2001 Messages: 1,890 Likes R
Post #1 of 8 (6542 views) Permalink full utilization on a T1 causing CRC/frame errors? Maybe I'm just showing my inexperience, but I have an ILEC telling me (verbally; they refused to put it in writing, suggesting that I google it instead) that fulling utilizating a T1 frame relay circuit will cause CRC, frame, and 'abort' input errors on my serial int's input counters. Any truth to this? -- Burton Windle bwindle [at] fint _______________________________________________ cisco-nsp mailing list cisco-nsp [at] puck https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ jared at puck Aug28,2006,11:23AM Post #2 of 8 (6447 views) Permalink Re: full utilization on a T1 causing CRC/frame errors? [In reply to] This sounds like a load. Full T1 circuits will not show any such errors, otherwise applications such as voice T1/PRI services which "fill" the entire circuit would also be seeing such errors. You should continue to work with them to isolate the source of errors. You will see things like output drops and other errors accumulate on your interface, as well as possibly lack of buffers, but not CRC, framing or 'arbort' types of errors. Ideally you'd start with your T1 PM's, such as the output of "show controller" or "show service-module" You'll see outputs like: 2610#show service-module Module type is T1/fractional Hardware revision is 0.88, Software revision is 20050811-0.3, Image checksum is 0x80ACD1B3, Protocol revision is 0.1 Receiver has no alarms. Framing is ESF, Line Code is B8ZS, Current clock source is line, Fraction has 24 timeslots (64 Kbits/sec each), Net bandwidth is 1536 Kbits/sec. Last module self-test (done at startup): Passed Last clearing of alarm counters 4w0d loss of signal : 0, loss of frame : 0, AIS alarm : 0, Remote alarm : 1, last occurred 4w0d Module access errors : 0, Total Data (last 96 15 minute intervals): 0 Line Code Violations, 1 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 1 Degraded Mins 1 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs Data in current interval (508 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Burs