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gregh1
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According to my router's network log there is a lot of errors.

Been having quite slow internet over the past week and a few problems popped up on the network log.

But I have no idea of what to make of any of them.

If someone could help tell me what they mean it would be greatly appreciated.

Network Log

First TimeLast TimePriorityError NumberDescription
 29/09/2016 15:29:31  29/09/2016 15:29:31  Error (4)  68010400  DHCP REBIND WARNING - Field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 
 26/09/2016 10:27:35  26/09/2016 10:27:35  Warning (5)  2436694061  Dynamic Range Window violation 
 30/09/2016 23:03:24  30/09/2016 23:03:24  Critical (3)  82000500  Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 
 30/09/2016 15:55:51  30/09/2016 15:55:51  Critical (3)  2436694078  TOD established 
 23/09/2016 12:30:08  23/09/2016 12:30:08  Critical (3)  82000400  Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 
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Superuser
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Re: According to my router's network log there is a lot of errors.

The DHCP rebind warning is part of the process the hub goes through to renew it's IP address. See the DHCP lifecycle here. This is not an error as such, just a by-product of a VM security feature, where DHCP Renew requests are ignored by VM's DHCP server, letting the hub to go into the REbind state before issuing a new IP address. (invariably the same IP address). Usually, this is nothing to worry about.

The Dynamic Range Violation error is where the power difference of two bonded channels have a difference of 12 or 15dBmV (can't remember which off the top of my head) causing the channels to debond and connection is lost. The hub will need to re-register with the CMTS.

ToD = Time of Day, this is a remnant from DOCSIS 1\2 synchronizing the hub to network time. This is just a message that indicates timing has been syncronised Network timing is handled by dedicated NTP servers in DOCSIS 3.

More on T3 and T4 errors here, they are basically what they say on the tin. A T4 error would indicate a drop in service, The odd T3 error is nothing to worry about, but several in a short space of time would suggest a upstream impairment such as  noise on the upstream and will result in a connection drop if the hub cannot raise it's upstream power level in time.

You will need to understand the Station Maintenance process and the cable modem Registration process to get a full understanding of these errors.

Posting the hub's power levels would help.

Are you experiencing the slow speed on a wired or wireless connection?

Are your speeds slowing down randomly or just during evening peak time?

 

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gregh1
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Re: According to my router's network log there is a lot of errors.

Another T3 Error took place at, if by in a short time you  mean in a number of days, rather than minutes.

 31/09/2016 14:39:20 

 

Specifically at peak times so far throughout the year. Say 7-12 on weekdays, and 6-11 on weekends, but also of recent sporadically at times when you wouldn't imagine anyone else in the local are to be using the internet such as 3am. I have a wired connection.

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Forum Team (Retired) Adam_L
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Re: According to my router's network log there is a lot of errors.

Hi gregh1, 

 

Thanks for letting us know that you're having issues with your router showing a lot of T3 time outs inside the Hubs logs, I apologise for any troubles.

 

I have run some tests from this side and I noticed that your Hub went offline and came back online whilst I was testing it, this would correspond with the T3 time outs you mentioned in your post.

 

I would like to arrange for an engineer to attend and investigate this further for you. I will send you a PM (purple envelope at the top) detailing what's required in order to make the booking.

 

Please respond to me there and I'll get this all sorted for you.

 

Take care, 

Thanks, 

Adam.


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