Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.



221 posts

Master Geek
+1 received by user: 16


Topic # 113551 20-Jan-2013 12:03 Send private message

Just wondering what a normal rate of CRC would be? over a 12 day peroid I have 121 errors down and 7 up. Should I be concerned?

Create new topic
2420 posts

Uber Geek
+1 received by user: 252

Trusted
Subscriber

  Reply # 747771 20-Jan-2013 13:26 Send private message

Personally i wouldnt be concerned unless it was impacting your internet connection.

When data is sent from the modem to the dslam (up) or from the dslam down to your modem (down), it is verified using a CRC check.

Eg. at one end, the content of the packet data is added up and a value is added onto the end.
At the other end, the packet is checked and the data should add up to the same value. If it doesnt, the Cyclic Redundancy Check fails and a retransmit request is sent.

Sent is: John jumped over the cat = 643
But arrives as John jumped on the cat = 634
we have an error
So the modem or dslam issues a resend request and if it arrives correctly, then it passes on to the next device in the line.

CRC failures can be caused by many things - usually interference. Interference can come from other broadband lines in the street. So this is why i say if its not causing you an issue, then dont worry about it.




Ray Taylor
Taylor Broadband (rural hawkes bay)
www.ruralkiwi.com

There is no place like localhost
For my general guide to extending your wireless network Click Here




713 posts

Ultimate Geek
+1 received by user: 32


  Reply # 747778 20-Jan-2013 13:46 Send private message

That's only 10 a day. Sounds like a good connection.

When my internet was dropping out I was getting a few hundard crcs an hour.

If i'm on wifi and the microwave is turned on I see the crcs go up, so there's normal causes that can make them happen.

1107 posts

Uber Geek
+1 received by user: 50


  Reply # 749217 22-Jan-2013 23:33 Send private message

If you get lots of CRC errors you can get corrupted downloads- you are fine though

Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





Trending now »

Hot discussions in our forums right now:

Smoke billows from Auckland mall after "explosion" - Westfield West City
Created by freitasm, last reply by hio77 on 27-Feb-2015 19:33 (41 replies)
Pages... 2 3


Why does Lightbox have a suicide wish?
Created by dafman, last reply by Lightbox on 28-Feb-2015 18:23 (26 replies)
Pages... 2


So, what made you join geekzone?
Created by DarthKermit, last reply by TLD on 28-Feb-2015 23:40 (68 replies)
Pages... 3 4 5


Leonard Nimoy, Mr Spock dies at 83
Created by freitasm, last reply by freitasm on 28-Feb-2015 22:20 (20 replies)
Pages... 2


Has my desktop got Wi-Fi?
Created by beenz, last reply by dclegg on 26-Feb-2015 15:43 (19 replies)
Pages... 2


The Evil that is ISIS
Created by networkn, last reply by joker97 on 28-Feb-2015 22:47 (201 replies)
Pages... 12 13 14


The debate over foreign drivers and testing
Created by timmmay, last reply by Handle9 on 28-Feb-2015 21:09 (73 replies)
Pages... 3 4 5


Spark Open Term Plan Changes? (27/2)
Created by taneb1, last reply by funnyfela on 28-Feb-2015 15:03 (37 replies)
Pages... 2 3



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.