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cable modem losing connection

H

hclarkjr

Lifer
i am running vista ultimate 64 bit with service pack 1. all i have to do is unplug the cable modem and plug it back in. it has done this 3-4 times the last week or so. never had any problems before that with it. is the modem going bad?

here is the rest of what event viewer says -
The IP address lease 67.43.99.16 for the Network Card with network address 001D7D9C85E1 has been denied by the DHCP server 192.168.100.1 (The DHCP Server sent a DHCPNACK message).
 
i own my own modem so that is not an option. i am thinking it might be the built in network card on my motherboard. not real sure though.
 
Originally posted by: hclarkjr
D-link DCM-202
Click to expand...
Check out the DLink's status page and see what it says (or even if you can talk to it):

a) Manually set the IP address of your computer to (IP address) 192.168.100.2 / (subnet mask) 255.255.255.0 . Don't worry about DNS or Default Gateway settings in this case.
b) Hook the PC directly to the cable modem
c) Use your web browser to view http://192.168.100.1

You should see error logs and status pages there.

Actually...before you do that, how about issuing the "IPCONFIG /ALL" command in an MSDOS Prompt window? List the results here.
 
Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Windows\system32>ipconfig/all

Windows IP Configuration

Host Name . . . . . . . . . . . . : HarryClark-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8168B/8111B Family PCI-E Gigab
it Ethernet NIC (NDIS 6.0)
Physical Address. . . . . . . . . : 00-1D-7D-9C-85-E1
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::7c02:fa28:9921:ebaa%8(Preferred)
IPv4 Address. . . . . . . . . . . : 67.43.99.16(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, October 27, 2008 2:35:35 PM
Lease Expires . . . . . . . . . . : Tuesday, October 28, 2008 2:35:35 PM
Default Gateway . . . . . . . . . : 67.43.99.1
DHCP Server . . . . . . . . . . . : 209.55.0.135
DNS Servers . . . . . . . . . . . : 204.117.214.10
204.97.212.10
208.31.212.8
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{4C3C3063-05E8-417E-9719-7F780DEF1
B91}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 7:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 6TO4 Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2002:432b:6310::432b:6310(Preferred)
Default Gateway . . . . . . . . . : 2002:c058:6301::c058:6301
DNS Servers . . . . . . . . . . . : 204.117.214.10
204.97.212.10
208.31.212.8
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 11:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e50:34a7:e12:bcd4:9cef(Prefe
rred)
Link-local IPv6 Address . . . . . : fe80::34a7:e12:bcd4:9cef%11(Preferred)
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

C:\Windows\system32>
 
It sounds like you have a DHCP server on your network that you don't know about, this could be a SOHO router or something like that. It's address is 192.168.100.1.

This DHCP server sent out a Negative acknogledment because this dhcp server has a scope of 192.168.100.0 running on it which is not the same address space as your 69.x.x.x public IP.

-edit-
Or it's possible that the provider has something going on, so as suggested remove any gear and plug directly into the modem. If still symptom call provider.
 
Originally posted by: hclarkjr
i have no router or nothing hooked up. straight into ethernet port on motherboard.
Click to expand...

Did the problem just start happening randomly or was there any changes in hardware/software on your side?

192.168.100.1 is a special ip address for cable modems. It's used to view information from the cable modem on the local side. When my modem has problems, it'll assign my router an ip address of 192.168.100.10 or something like that. You might want to discuss your issue with a level 2 technician at the cable company.
 
there were no changes at all. the only thing i can think of is that the cable was cut off when there was a car wreck that took out some poles and interrupted service for 8 hours or so. it come back up on its own but then a few days later the problems started.
 
I would definitely talk to someone about this. They may not notice there is a problem. So if you don't raise their awareness to the problem, they're going to think everything is ok. Just chat them up and be nice, and I think they'll help you figure it out.
 
well i called cable company and he looked at my signal and so forth and said he seen nothing wrong and that my signal strength was real good. well 1 hour later my cable modem had big fit. i found out how to access my error log for the modem and seen this listed -


Index Date/Time ID Level Text
12 10/28/08 20:41:11 T01.0 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
13 10/28/08 20:47:51 R04.0 critical Received Response to Broadcast Maintenance Request, but no Unicast Maintenance opportunities received - T4 timeout
14 10/28/08 20:47:51 T01.0 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
15 10/28/08 20:48:07 T05.0 critical SYNC Timing Synchronization failure - Loss of Sync
16 10/28/08 20:48:08 T01.0 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
17 10/28/08 20:47:39 U02.0 critical UCD invalid or channel unusable
18 10/28/08 20:47:40 T01.0 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
19 10/28/08 20:47:57 U02.0 critical UCD invalid or channel unusable
20 10/28/08 20:47:57 T01.0 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
21 10/28/08 20:47:44 D03.0 warning DHCP WARNING - Non-critical field invalid in response
22 10/28/08 20:53:56 R02.0 critical No Ranging Response received - T3 time-out
23 10/28/08 20:54:26 R04.0 critical Received Response to Broadcast Maintenance Request, but no Unicast Maintenance opportunities received - T4 timeout
24 10/28/08 20:54:33 T05.0 critical SYNC Timing Synchronization failure - Loss of Sync
25 10/28/08 20:54:33 T01.0 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
26 10/28/08 20:54:49 T05.0 critical SYNC Timing Synchronization failure - Loss of Sync
27 10/28/08 20:54:49 T01.0 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
28 10/28/08 20:55:06 T05.0 critical SYNC Timing Synchronization failure - Loss of Sync
29 10/28/08 20:55:06 T01.0 critical SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing
30 10/28/08 20:55:37 R02.0 critical No Ranging Response received - T3 time-out
31 10/28/08 20:55:43 D03.0 warning DHCP WARNING - Non-critical field invalid in response

what does this mean?
 
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