Super frame errors upstream

super frame errors upstream

Forward Error Correction (FEC). Line Encryption Each upstream GPON frame has a fixed length of 125 s. q. Each upstream frame contains the content. monitoring live T1 signals for Alarms and Errors. point are often Telco upstream issues. If the CPE setup uses Extended Super Frame. Identification of upstream open reading frames (uORFs) in S. cerevisiae. a are represented as averages of at least four biological replicates with error.

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Super frame errors upstream - apologise, but

What can be causing my tremendous amount of FEC and CRC errors via my DSL connection?

I am using Windows 7, Intel core processor, I7-4770K CPU @ 3.50 GHz, 64-bit operating system and 8 GB of RAM and for over 6 weeks I have been having intermittent disconnections — FEC and CRC errors almost daily — from the internet which prompted my calling my DSL provider.

They have come to my home several times in an attempt to resolve the issue.

They've changed several wirings, switched out the modem, checked the phone lines, monitored my PC for errors, etc. During one of their visits, they showed me a way to see the errors I was getting.

And after their "extensive" work, they finally told me yesterday that the problem was with my computer. The FEC and CRC errors can appear at any time; there seems to be no real pattern.

To give you an example, just since they left yesterday afternoon (it's been about 24 hours), I have had 5,205,160 FEC errors and 1,063,952 CRC errors. They continue to flood in as I am writing this. In the last 15 minutes, I have had 396,474 CRC errors alone.

Another weird thing is that my modem's lights are active (e.g., Internet and DSL) even when I have no internet connection.

Is there any way to resolve this problem?

The DSL provider has given up and told me that I will have to pay for any more of their visits regarding this issue.

Incidentally, I lost my internet connection just before I started writing this post and again while I was writing it. Usually the internet comes back up in 2-5 minutes, but this last time it never came back up after 20 minutes, so I had to unplug the power from the modem and then plug it back in to get the internet running again.

 

ADSL statistics

This page shows the signal attributes of the router's ADSL connection.

At the bottom of this page, there is a button for running an ADSL BER Test (bit error rate). This test determines the quality of the ADSL connection. There is information on this test below the table describing the fields.

This table describes the fields on the page:

  • Mode: This is the modulation protocol — G.DMT, T1.413, or G.lite.
  • Type: The channel type, which can be Interleave or Fast.
  • Line coding: This indicates whether Trellis coding is off or on.
  • Status: This is the status of the DSL link.
  • Link power state: Displays the power management state of the ADSL connection.
  • SNR margin (dB): This is a signal-to-noise ratio (SNR) margin for traffic going in both directions.
  • Attenuation (dB): An estimate of the average loop attenuation downstream and upstream.
  • Output power (dBm): The total output power in both directions.
  • Attainable rate: This is the maximum achievable downstream rate.
  • Rate (Kbps): The actual rate at which data is flowing in both directions.
  • K: This is the number of data bytes in an ADSL data frame.
  • R: The number of redundant check bytes per Reed-Solomon code word.
  • S: The length of the Reed-Solomon code word, in data frames.
  • D: The interleaver depth.
  • Delay: The delay, in microseconds, of the ADSL connection.
  • Super frames: This is the total number of super frames.
  • Super frame Errors: The number of super frames received that had errors.
  • RS words: This is the total number of Reed-Solomon code words.
  • RS correctable Errors: The number of Reed-Solomon code words with correctable errors.
  • RS uncorrectable Errors: The number of R-S code words that had uncorrectable errors.
  • HEC Errors: The total number of header error checksum errors.
  • OCD Errors: The number of out-of-cell delineation errors.
  • LCD Errors: The total of lost-cell-delineation errors.
  • Total Errors: The total number of errors.
  • Data Cells: The number of data cells.
  • Bit Errors: The number of bit errors.
  • Total ES: The total extended superframe errors.
  • Total SES: The total
  • Total UAS: The

ADSL BER (Bit error rate) Test

A bit error rate test is available from the ADSL statistics page. Follow this procedure to run a bit error rate test.

Warning: Running this test may cause your ADSL connection to be lost.

  1. Below the table in the ADSL statistics page, click the ADSL BER Test button.
  2. In Tested time, pick a length for the test. Then click Start when ready to begin the test.

  3. The window shows you the test status. You can click Stop any time to end the test.


  4. The results appear in the window when the test is done.

     

Return to the Status menu options.

SF}"in the show controller t1 output.

Step 2 To change the framing format, use the framing {SF

trust upstream

Scenario

To map priorities of the packets sent from the upstream device to PHBs according to the mappings defined in a DiffServ domain, run the trust upstream command to bind the DiffServ domain to the inbound interface of the packets. The system then maps priorities of packets to PHBs according to the mappings defined in the DiffServ domain.

To map PHBs of the packets sent to the downstream device to priorities according to the mappings defined in a DiffServ domain, run the trust upstream command to bind the DiffServ domain to the outbound interface of the packets. The system then maps PHBs of packets to the priorities according to the mappings defined in the DiffServ domain.

Prerequisites

A DiffServ domain has been created.

Precautions

  • After the trust upstreamcommand is executed on an interface, the system maps the priorities of packets on the interface to the following values according to the mappings defined in the DiffServ domain:

    For default mappings from 802.1p priorities to PHBs and colors, from PHBs and colors to 802.1p priorities, from DSCP priorities to PHBs and colors, and from PHBs and colors to DSCP priorities, see the 8021p-inbound, 8021p-outbound, ip-dscp-inbound, and ip-dscp-outbound commands.

  • After the trust upstreamnone command is executed, the system performs no priority mapping on packets passing the interface.
  • To change the DiffServ domain bound to an interface, run the undo trust upstream command to unbind the original DiffServ domain from the interface, and then run the trust upstream command to bind the new DiffServ domain to the interface.
  • If you run the trust upstream command multiple times in the same interface view, only the latest configuration takes effect.

  • To bind a DiffServ domain to multiple interfaces, you can perform the configuration on the port group to reduce the workload.

port] [serial] (ports on VIP cards in the Cisco 7500 series)

show interfaces serial [type slot My WoW characters