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tate1711

@rr.com

[TWC] TWC DHCP errors

I have a house in Cincinnati Ohio pre-wired for network service. All I need is a modem. The time warner modem is kicking out DHCP errors. Copy of log below. I have the modem set up in "Bridge mode" so that the router assigns all ip addresses before passing to the switch. I have intermittent drops. Does anyone have any ideas on this one? It appears to be a DHCP error but I'm stumped as to what exactly it is.

Thu Nov 01 22:02:22 2012 Error (4) DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.1;CM-VER=3.0;
Mon Oct 29 14:15:16 2012 Error (4) Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.1;CM-VER=3.0;
Mon Oct 29 14:15:16 2012 Error (4) Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.1;CM-VER=3.0;
Time Not Established Warning (5) DHCP WARNING - Non-critical field invalid in response ;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Mon Oct 29 14:14:24 2012 Critical (3) Resetting the cable modem due to docsDevResetNow
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Sat Oct 20 04:13:02 2012 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.1;CM-VER=3.0;
Fri Oct 19 13:43:33 2012 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.1;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;


jpatton1979

join:2011-08-10
Lexington, KY

Do you have a cable modem or a cable gateway (what make/model)? I've never heard of a modem acting as a DHCP server, but could be wrong.

What you want to do is disable DHCP server on all devices except your router (or even set your modem/gateway to forward all DHCP client requests to the IP of your router).

Another thing to try is to have your internal network use a scope that's different than the one the modem/gateway uses. Normally your modem/gateway has an IP of 192.168.100.1. Set your internal network to use a private network scheme other than the usual 192.168.x.x one (like 172.16.1.x or 10.1.1.x).

The full list of private network address can be found at »en.wikipedia.org/wiki/Private_network



DrDrew
That others may surf
Premium
join:2009-01-28
SoCal
kudos:15
reply to tate1711

You have signal problems.

The DHCP problems in the log are affecting the IP issued to the modem. The log entires are caused by the interaction with the server being interrupted.

Post the modem signals from »192.168.1.1 or »192.168.100.1



tate1711

@rr.com

I believe this is what you are looking for:

1 Locked QAM256 41 705000000 Hz 10.7 dBmV 40.9 dB 0 0
2 Locked QAM256 42 711000000 Hz 10.8 dBmV 40.8 dB 0 0
3 Locked QAM256 43 717000000 Hz 10.8 dBmV 40.9 dB 0 0
4 Locked QAM256 44 723000000 Hz 10.5 dBmV 40.8 dB 0 0
5 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
6 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
8 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0

Make and model of modem is Surfboard SBG6580. I have DHCP turned off on the modem.



tate1711

@rr.com

I changed over to internal IP addresses of 10.1.1.100+ and we'll see what happens. Everything as of right now appears to connect. Something else I noticed last night that may be related is when I'm downloading from usenet I have significant packet loss, which brings me back to possible connection issues, even after making these changes. Doesn't appear to be the same if I use utorrent, or any other client. I've been using pingplotter to watch my connection. I did check to see if I had traffic shaping with a couple of tools I found online, but didn't appear I had that going on. Any ideas are appreciated. I think we are moving in the right direction. How does the quality of my signal look? Time warner has been out 3 times and replaced the modem 4 times...the router is new, the switch is new, heck, even all the wiring is new inside the house.



DrDrew
That others may surf
Premium
join:2009-01-28
SoCal
kudos:15
reply to tate1711

said by tate1711 :

I believe this is what you are looking for:

1 Locked QAM256 41 705000000 Hz 10.7 dBmV 40.9 dB 0 0
2 Locked QAM256 42 711000000 Hz 10.8 dBmV 40.8 dB 0 0
3 Locked QAM256 43 717000000 Hz 10.8 dBmV 40.9 dB 0 0
4 Locked QAM256 44 723000000 Hz 10.5 dBmV 40.8 dB 0 0
5 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
6 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
8 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0

Make and model of modem is Surfboard SBG6580. I have DHCP turned off on the modem.

That's only the downstream signal info, which is ok. There is also upstream signal levels.
--
If it's important, back it up... twice. Even 99.999% availability isn't enough sometimes.


tate1711

@rr.com

Upstream:

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 19 5120 Ksym/sec 34000000 Hz 42.7 dBmV
2 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
3 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV



tate1711

@rr.com

More errors on Monday:
Mon Nov 05 10:02:22 2012 Notice (6) DHCP Renew - lease parameters Time Protocol Servers modified;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.1;CM-VER=3.0;
Mon Nov 05 10:02:22 2012 Error (4) DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.1;CM-VER=3.0;

I tend to think this is a roadrunner issue and it's become my problem because of their lack of interest in fixing. Any ideas?



tate1711

@rr.com

The latest, disconnected 20x + today. Pingplotter showed packet loss at 100% intermittently for 2-3 minutes each time. Seems to be at random intervals. Roadrunner, in all of their wisdom, now believes it's an issue with the line somewhere. Does this seem consistent with the noise readings I've posted along with the other data I've provided? Since they made some change now I'm getting packetloss between the modem and the router.



tate1711

@rr.com

Narrowing it down, took modem out of bridge mode after factory reset. Plugged direct into modem on one pc and direct into switch on the other. Same packet loss 99% of the time, meaning it's the modem for sure. Time warner at a loss.
The noise ratios when I have interference are as follows:

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables
1 Locked QAM256 41 705000000 Hz 9.6 dBmV 40.8 dB 0 0
2 Locked QAM256 42 711000000 Hz 9.7 dBmV 40.9 dB 0 0
3 Locked QAM256 43 717000000 Hz 9.7 dBmV 40.8 dB 0 0
4 Locked QAM256 44 723000000 Hz 9.4 dBmV 40.8 dB 0 0
5 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
6 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
7 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0
8 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 19 5120 Ksym/sec 34000000 Hz 42.9 dBmV
2 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
3 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV
4 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV

Also got this error this morning on the modem log

Thu Nov 08 09:49:59 2012 Error (4) Map Request Retry Timeout;CM-MAC=7c:bf:b1:7f:01:6b;CMTS-MAC=00:30:b8:d8:1f:22;CM-QOS=1.1;CM-VER=3.0
Does this help?