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.



205 posts

Master Geek
+1 received by user: 13


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
2246 posts

Uber Geek
+1 received by user: 200

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




660 posts

Ultimate Geek
+1 received by user: 26


  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.

1082 posts

Uber Geek
+1 received by user: 47


  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:

Who Audits IRD?
Created by gundar, last reply by charsleysa on 22-Oct-2014 15:52 (18 replies)
Pages... 2


22nd Only: PB Tech BROTHER HL1110 Mono laser Printer $15 shipped(after $30 cashback)
Created by loceff13, last reply by Jaxson on 22-Oct-2014 15:44 (17 replies)
Pages... 2


American legal jurisdiction in New Zealand
Created by ajobbins, last reply by gzt on 21-Oct-2014 14:58 (30 replies)
Pages... 2


Another Trade Me competitor: SellShed
Created by freitasm, last reply by SellShed on 22-Oct-2014 11:54 (42 replies)
Pages... 2 3


Spark Socialiser
Created by freitasm, last reply by old3eyes on 22-Oct-2014 10:37 (26 replies)
Pages... 2


Snap have failed our company!
Created by dafman, last reply by toejam316 on 22-Oct-2014 13:03 (25 replies)
Pages... 2


Overcharged by Slingshot for months - warning to existing customers
Created by dusty42, last reply by DravidDavid on 22-Oct-2014 16:11 (35 replies)
Pages... 2 3


Abnormal upstream data usage - Vodafone Cable Wellington
Created by otherside, last reply by freitasm on 22-Oct-2014 15:33 (11 replies)


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.