PDA

View Full Version : WRT54G + Comcast = random cutouts?



Justin
12-02-09, 01:23 AM
Two days ago my WRT54G V6 started cutting out the internet connection
for no reason.
I updated the firmware and that didn't help. Per Google I changed the
MTU from auto to 1492, I thought that worked until just now it cut out
on me.
The cable modem is a Linksys BEFCMU10 version 4.
When I go to its diagnostic page http://192.168.100.1/ this is what I get:
Modem
Standard Specification Compliant DOCSIS 2.0
Hardware Version v2.0
Software Version 2.0.3.4.2-1212
Cable Modem MAC Address <removed>
Cable Modem Serial Number <removed>
CM certificate Installed

CONNECTION:

Startup Procedure


Status Comment
Acquire Downstream Channel 723000000 Hz Locked
Connectivity State Operational Operational
Boot State OK Operational
Security Enabled BPI+


Downstream Channel


Lock Status Operational
Modulation 256QAM
Channel ID 45
Provisioned Rate 6600 kbps
Symbol Rate 5360.537 Ksym/sec
Downstream Power 1.2 dBmV
SNR 38.2 dB


Upstream Channel


Lock Status Operational
Modulation 16QAM
Channel ID 2
Provisioned Rate 1100 kbps
Symbol Rate 5120 Ksym/sec
Upstream Power 37.2 dBmV



and the log

Time Priority Description
2009-12-02 01:13:12 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-02 01:13:08 critical No Ranging Response received - T3
time-out
2009-12-02 01:13:03 critical Received Response to Broadcast
Maintenance Request, But no Unicast Maintenance opportunities received -
T4 timeout
2009-12-02 01:12:30 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 22:56:19 critical Received Response to Broadcast
Maintenance Request, But no Unicast Maintenance opportunities received -
T4 timeout
2009-12-01 22:55:47 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 20:57:49 critical Received Response to Broadcast
Maintenance Request, But no Unicast Maintenance opportunities received -
T4 timeout
2009-12-01 20:57:16 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:58:03 critical No Ranging Response received - T3
time-out
2009-12-01 00:57:58 critical Received Response to Broadcast
Maintenance Request, But no Unicast Maintenance opportunities received -
T4 timeout
2009-12-01 00:57:57 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:26 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:24 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:23 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:21 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:21 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:18 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:16 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:15 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:14 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:12 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:11 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:09 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:07 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:06 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:04 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:03 critical DHCP FAILED - Request sent, No response
2009-12-01 00:57:02 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:57:00 critical DHCP FAILED - Request sent, No response
2009-12-01 00:56:59 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-01 00:56:57 critical DHCP FAILED - Request sent, No response
1970-01-01 00:00:06 critical No Ranging Response received - T3
time-out

f/fgeorge
12-02-09, 05:51 AM
On Wed, 02 Dec 2009 01:23:10 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>Two days ago my WRT54G V6 started cutting out the internet connection
>for no reason.
>I updated the firmware and that didn't help. Per Google I changed the
>MTU from auto to 1492, I thought that worked until just now it cut out
>on me.
>The cable modem is a Linksys BEFCMU10 version 4.
>When I go to its diagnostic page http://192.168.100.1/ this is what I get:
>Modem

Maybe your router is getting hot or going bad? I have Comcast and the
same router and it works just fine. Have you tried an alternative
software for the router?

Justin
12-02-09, 05:00 PM
f/fgeorge wrote:
> On Wed, 02 Dec 2009 01:23:10 -0500, Justin
> <justin@nobecauseihatespam.com> wrote:
>
>> Two days ago my WRT54G V6 started cutting out the internet connection
>> for no reason.
>> I updated the firmware and that didn't help. Per Google I changed the
>> MTU from auto to 1492, I thought that worked until just now it cut out
>> on me.
>> The cable modem is a Linksys BEFCMU10 version 4.
>> When I go to its diagnostic page http://192.168.100.1/ this is what I get:
>> Modem
>
> Maybe your router is getting hot or going bad? I have Comcast and the
> same router and it works just fine. Have you tried an alternative
> software for the router?

Its not getting hot, it has been sitting in the same place for the last
year without a problem. There's no dust.


I heard about alternative firmwares for the Linksys...
Which one should I try?

f/fgeorge
12-02-09, 06:19 PM
On Wed, 02 Dec 2009 17:00:50 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>f/fgeorge wrote:
>> On Wed, 02 Dec 2009 01:23:10 -0500, Justin
>> <justin@nobecauseihatespam.com> wrote:
>>
>>> Two days ago my WRT54G V6 started cutting out the internet connection
>>> for no reason.
>>> I updated the firmware and that didn't help. Per Google I changed the
>>> MTU from auto to 1492, I thought that worked until just now it cut out
>>> on me.
>>> The cable modem is a Linksys BEFCMU10 version 4.
>>> When I go to its diagnostic page http://192.168.100.1/ this is what I get:
>>> Modem
>>
>> Maybe your router is getting hot or going bad? I have Comcast and the
>> same router and it works just fine. Have you tried an alternative
>> software for the router?
>
>Its not getting hot, it has been sitting in the same place for the last
>year without a problem. There's no dust.
>
>
>I heard about alternative firmwares for the Linksys...
>Which one should I try?

All the reviewers like Tomato, I use HyperWrt 2.0, it works fine for
me.

Justin
12-02-09, 11:16 PM
f/fgeorge wrote:
> On Wed, 02 Dec 2009 17:00:50 -0500, Justin
> <justin@nobecauseihatespam.com> wrote:
>
>> f/fgeorge wrote:
>>> On Wed, 02 Dec 2009 01:23:10 -0500, Justin
>>> <justin@nobecauseihatespam.com> wrote:
>>>
>>>> Two days ago my WRT54G V6 started cutting out the internet connection
>>>> for no reason.
>>>> I updated the firmware and that didn't help. Per Google I changed the
>>>> MTU from auto to 1492, I thought that worked until just now it cut out
>>>> on me.
>>>> The cable modem is a Linksys BEFCMU10 version 4.
>>>> When I go to its diagnostic page http://192.168.100.1/ this is what I get:
>>>> Modem
>>> Maybe your router is getting hot or going bad? I have Comcast and the
>>> same router and it works just fine. Have you tried an alternative
>>> software for the router?
>> Its not getting hot, it has been sitting in the same place for the last
>> year without a problem. There's no dust.
>>
>>
>> I heard about alternative firmwares for the Linksys...
>> Which one should I try?
>
> All the reviewers like Tomato, I use HyperWrt 2.0, it works fine for
> me.

Both of which I can't use due to version 6.0.

Bill M.
12-02-09, 11:37 PM
On Wed, 02 Dec 2009 23:16:47 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>f/fgeorge wrote:
>> On Wed, 02 Dec 2009 17:00:50 -0500, Justin
>> <justin@nobecauseihatespam.com> wrote:
>>
>>> f/fgeorge wrote:
>>>> On Wed, 02 Dec 2009 01:23:10 -0500, Justin
>>>> <justin@nobecauseihatespam.com> wrote:
>>>>
>>>>> Two days ago my WRT54G V6 started cutting out the internet connection
>>>>> for no reason.
>>>>> I updated the firmware and that didn't help. Per Google I changed the
>>>>> MTU from auto to 1492, I thought that worked until just now it cut out
>>>>> on me.
>>>>> The cable modem is a Linksys BEFCMU10 version 4.
>>>>> When I go to its diagnostic page http://192.168.100.1/ this is what I get:
>>>>> Modem
>>>> Maybe your router is getting hot or going bad? I have Comcast and the
>>>> same router and it works just fine. Have you tried an alternative
>>>> software for the router?
>>> Its not getting hot, it has been sitting in the same place for the last
>>> year without a problem. There's no dust.
>>>
>>>
>>> I heard about alternative firmwares for the Linksys...
>>> Which one should I try?
>>
>> All the reviewers like Tomato, I use HyperWrt 2.0, it works fine for
>> me.
>
>Both of which I can't use due to version 6.0.

I use and recommend dd-wrt. You can check if your device is supported
here: http://www.dd-wrt.com/wiki/index.php/Supported_Devices

--
Bill

Timothy Daniels
12-03-09, 01:27 AM
"Justin" wrote:
> Two days ago my WRT54G V6 started cutting out the internet connection for no reason.
> I updated the firmware and that didn't help. Per Google I changed the MTU from auto to 1492, I thought that worked
> until just now it cut out on me.
> [.........]

Try changing the frequency band that your wireless router uses.
I had a Linksys WRT54GS wireless router that worked for a couple
months, and then the connection started getting iffy. I suffered for at
least 6 months, thinking that "it's that flaky Wi-Fi crap". I finally tried
changing to a different frequency band, and then the connection became
rock solid. A neighbor had probably gotten a wireless router, too, and
chose the same band. Or someone nearby got a wireless telephone.

*TimDaniels*

Justin
12-03-09, 02:57 AM
Timothy Daniels wrote:
> "Justin" wrote:
>> Two days ago my WRT54G V6 started cutting out the internet connection for no reason.
>> I updated the firmware and that didn't help. Per Google I changed the MTU from auto to 1492, I thought that worked
>> until just now it cut out on me.
>> [.........]
>
> Try changing the frequency band that your wireless router uses.
> I had a Linksys WRT54GS wireless router that worked for a couple
> months, and then the connection started getting iffy. I suffered for at
> least 6 months, thinking that "it's that flaky Wi-Fi crap". I finally tried
> changing to a different frequency band, and then the connection became
> rock solid. A neighbor had probably gotten a wireless router, too, and
> chose the same band. Or someone nearby got a wireless telephone.
>
> *TimDaniels*
>
>

Do you mean channel, or band? For example I have it on channel 11,
using G. Should I go back to b?

Bill M.
12-03-09, 11:59 AM
On Thu, 03 Dec 2009 02:57:37 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>Timothy Daniels wrote:
>> "Justin" wrote:
>>> Two days ago my WRT54G V6 started cutting out the internet connection for no reason.
>>> I updated the firmware and that didn't help. Per Google I changed the MTU from auto to 1492, I thought that worked
>>> until just now it cut out on me.
>>> [.........]
>>
>> Try changing the frequency band that your wireless router uses.
>> I had a Linksys WRT54GS wireless router that worked for a couple
>> months, and then the connection started getting iffy. I suffered for at
>> least 6 months, thinking that "it's that flaky Wi-Fi crap". I finally tried
>> changing to a different frequency band, and then the connection became
>> rock solid. A neighbor had probably gotten a wireless router, too, and
>> chose the same band. Or someone nearby got a wireless telephone.
>>
>> *TimDaniels*
>>
>>
>
>Do you mean channel, or band? For example I have it on channel 11,
>using G. Should I go back to b?

I think he meant channel. Going from G to B (or vice versa) will not
help. Changing to another channel MAY help, assuming you find a
channel without interference. Note that there are only 3
non-overlapping channels: 1, 6, and 11. Try doing a site survey to see
which channels are in heavy use, and then avoid them.

--
Bill

Justin
12-03-09, 07:42 PM
Bill M. wrote:
> On Thu, 03 Dec 2009 02:57:37 -0500, Justin
> <justin@nobecauseihatespam.com> wrote:
>
>> Timothy Daniels wrote:
>>> "Justin" wrote:
>>>> Two days ago my WRT54G V6 started cutting out the internet connection for no reason.
>>>> I updated the firmware and that didn't help. Per Google I changed the MTU from auto to 1492, I thought that worked
>>>> until just now it cut out on me.
>>>> [.........]
>>> Try changing the frequency band that your wireless router uses.
>>> I had a Linksys WRT54GS wireless router that worked for a couple
>>> months, and then the connection started getting iffy. I suffered for at
>>> least 6 months, thinking that "it's that flaky Wi-Fi crap". I finally tried
>>> changing to a different frequency band, and then the connection became
>>> rock solid. A neighbor had probably gotten a wireless router, too, and
>>> chose the same band. Or someone nearby got a wireless telephone.
>>>
>>> *TimDaniels*
>>>
>>>
>> Do you mean channel, or band? For example I have it on channel 11,
>> using G. Should I go back to b?
>
> I think he meant channel. Going from G to B (or vice versa) will not
> help. Changing to another channel MAY help, assuming you find a
> channel without interference. Note that there are only 3
> non-overlapping channels: 1, 6, and 11. Try doing a site survey to see
> which channels are in heavy use, and then avoid them.
>

I went from 11 to 1 - no change. I used kismac to see what channels are
open, there is one other wireless network on channel 6 - very weak
signal. He has wpa2 enabled just like me.

Bill M.
12-03-09, 08:11 PM
On Thu, 03 Dec 2009 19:42:38 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>Bill M. wrote:
>> On Thu, 03 Dec 2009 02:57:37 -0500, Justin
>> <justin@nobecauseihatespam.com> wrote:
>>
>>> Timothy Daniels wrote:
>>>> "Justin" wrote:
>>>>> Two days ago my WRT54G V6 started cutting out the internet connection for no reason.
>>>>> I updated the firmware and that didn't help. Per Google I changed the MTU from auto to 1492, I thought that worked
>>>>> until just now it cut out on me.
>>>>> [.........]
>>>> Try changing the frequency band that your wireless router uses.
>>>> I had a Linksys WRT54GS wireless router that worked for a couple
>>>> months, and then the connection started getting iffy. I suffered for at
>>>> least 6 months, thinking that "it's that flaky Wi-Fi crap". I finally tried
>>>> changing to a different frequency band, and then the connection became
>>>> rock solid. A neighbor had probably gotten a wireless router, too, and
>>>> chose the same band. Or someone nearby got a wireless telephone.
>>>>
>>>> *TimDaniels*
>>>>
>>>>
>>> Do you mean channel, or band? For example I have it on channel 11,
>>> using G. Should I go back to b?
>>
>> I think he meant channel. Going from G to B (or vice versa) will not
>> help. Changing to another channel MAY help, assuming you find a
>> channel without interference. Note that there are only 3
>> non-overlapping channels: 1, 6, and 11. Try doing a site survey to see
>> which channels are in heavy use, and then avoid them.
>>
>
>I went from 11 to 1 - no change. I used kismac to see what channels are
>open, there is one other wireless network on channel 6 - very weak
>signal. He has wpa2 enabled just like me.

With that info, I think you can probably rule out interference from
other wireless networks. Unfortunately, wireless networks aren't the
only thing that use that band.

By the way, if I were going to manually set the router's MTU, I'd
probably use 1500 rather than 1492 bytes, but that's based on an
experience I had quite a few years ago so it may not apply now.

When your Internet connection goes down, have you pinpointed whether
the culprit is the router, cable modem, or other?

--
Bill

Justin
12-03-09, 10:51 PM
Bill M. wrote:
> On Thu, 03 Dec 2009 19:42:38 -0500, Justin
> <justin@nobecauseihatespam.com> wrote:
>
>> Bill M. wrote:
>>> On Thu, 03 Dec 2009 02:57:37 -0500, Justin
>>> <justin@nobecauseihatespam.com> wrote:
>>>
>>>> Timothy Daniels wrote:
>>>>> "Justin" wrote:
>>>>>> Two days ago my WRT54G V6 started cutting out the internet connection for no reason.
>>>>>> I updated the firmware and that didn't help. Per Google I changed the MTU from auto to 1492, I thought that worked
>>>>>> until just now it cut out on me.
>>>>>> [.........]
>>>>> Try changing the frequency band that your wireless router uses.
>>>>> I had a Linksys WRT54GS wireless router that worked for a couple
>>>>> months, and then the connection started getting iffy. I suffered for at
>>>>> least 6 months, thinking that "it's that flaky Wi-Fi crap". I finally tried
>>>>> changing to a different frequency band, and then the connection became
>>>>> rock solid. A neighbor had probably gotten a wireless router, too, and
>>>>> chose the same band. Or someone nearby got a wireless telephone.
>>>>>
>>>>> *TimDaniels*
>>>>>
>>>>>
>>>> Do you mean channel, or band? For example I have it on channel 11,
>>>> using G. Should I go back to b?
>>> I think he meant channel. Going from G to B (or vice versa) will not
>>> help. Changing to another channel MAY help, assuming you find a
>>> channel without interference. Note that there are only 3
>>> non-overlapping channels: 1, 6, and 11. Try doing a site survey to see
>>> which channels are in heavy use, and then avoid them.
>>>
>> I went from 11 to 1 - no change. I used kismac to see what channels are
>> open, there is one other wireless network on channel 6 - very weak
>> signal. He has wpa2 enabled just like me.
>
> With that info, I think you can probably rule out interference from
> other wireless networks. Unfortunately, wireless networks aren't the
> only thing that use that band.
>
> By the way, if I were going to manually set the router's MTU, I'd
> probably use 1500 rather than 1492 bytes, but that's based on an
> experience I had quite a few years ago so it may not apply now.
>
> When your Internet connection goes down, have you pinpointed whether
> the culprit is the router, cable modem, or other?
>

I confirmed it is not the wireless - the ethernet machines go down as well.
It has been OK for the day so maybe it healed itself....
I had a problem with the MTU back around 2004, I would connect to a
friend's dyndns.org site. When I tried to upload a file it would
transfer the first byte and quit.
Once I set the MTU from 1,500 to 1,492 it worked.
I never understood what the problem was. That was with a different
router, though.

Bill M.
12-03-09, 11:25 PM
On Thu, 03 Dec 2009 22:51:28 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>Bill M. wrote:
>> On Thu, 03 Dec 2009 19:42:38 -0500, Justin
>> <justin@nobecauseihatespam.com> wrote:
>>
>>> Bill M. wrote:
>>>> On Thu, 03 Dec 2009 02:57:37 -0500, Justin
>>>> <justin@nobecauseihatespam.com> wrote:
>>>>
>>>>> Timothy Daniels wrote:
>>>>>> "Justin" wrote:
>>>>>>> Two days ago my WRT54G V6 started cutting out the internet connection for no reason.
>>>>>>> I updated the firmware and that didn't help. Per Google I changed the MTU from auto to 1492, I thought that worked
>>>>>>> until just now it cut out on me.
>>>>>>> [.........]
>>>>>> Try changing the frequency band that your wireless router uses.
>>>>>> I had a Linksys WRT54GS wireless router that worked for a couple
>>>>>> months, and then the connection started getting iffy. I suffered for at
>>>>>> least 6 months, thinking that "it's that flaky Wi-Fi crap". I finally tried
>>>>>> changing to a different frequency band, and then the connection became
>>>>>> rock solid. A neighbor had probably gotten a wireless router, too, and
>>>>>> chose the same band. Or someone nearby got a wireless telephone.
>>>>>>
>>>>>> *TimDaniels*
>>>>>>
>>>>>>
>>>>> Do you mean channel, or band? For example I have it on channel 11,
>>>>> using G. Should I go back to b?
>>>> I think he meant channel. Going from G to B (or vice versa) will not
>>>> help. Changing to another channel MAY help, assuming you find a
>>>> channel without interference. Note that there are only 3
>>>> non-overlapping channels: 1, 6, and 11. Try doing a site survey to see
>>>> which channels are in heavy use, and then avoid them.
>>>>
>>> I went from 11 to 1 - no change. I used kismac to see what channels are
>>> open, there is one other wireless network on channel 6 - very weak
>>> signal. He has wpa2 enabled just like me.
>>
>> With that info, I think you can probably rule out interference from
>> other wireless networks. Unfortunately, wireless networks aren't the
>> only thing that use that band.
>>
>> By the way, if I were going to manually set the router's MTU, I'd
>> probably use 1500 rather than 1492 bytes, but that's based on an
>> experience I had quite a few years ago so it may not apply now.
>>
>> When your Internet connection goes down, have you pinpointed whether
>> the culprit is the router, cable modem, or other?
>>
>
>I confirmed it is not the wireless - the ethernet machines go down as well.
>It has been OK for the day so maybe it healed itself....
>I had a problem with the MTU back around 2004, I would connect to a
>friend's dyndns.org site. When I tried to upload a file it would
>transfer the first byte and quit.
>Once I set the MTU from 1,500 to 1,492 it worked.
>I never understood what the problem was. That was with a different
>router, though.

So it could still be the router, the cable modem, or the ISP. If it
happens again, try to narrow it down further.

--
Bill

Justin
12-04-09, 12:50 AM
Bill M. wrote:

>
> So it could still be the router, the cable modem, or the ISP. If it
> happens again, try to narrow it down further.
>

Thanks for the tip.
Yes, it keeps happening now. I can get about two nimutes of internet
usage and then it craps out.

I unplug the modem and router, plug the modem back in, and then the router.
I can get an external IP address.
Once it craps out, I still have the ip address.
I CAN get to the router setup fine.
I have to hit renew several times before I get an IP, but its always
been like that.

Here's the log from 192.168.100.1
Time Priority Description
2009-12-04 00:48:01 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-04 00:45:19 critical No Ranging Response received - T3
time-out
2009-12-04 00:45:15 critical Received Response to Broadcast
Maintenance Request, But no Unicast Maintenance opportunities received -
T4 timeout
2009-12-04 00:44:42 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-04 00:42:54 critical REG RSP not received
2009-12-04 00:42:38 critical No Ranging Response received - T3
time-out
2009-12-04 00:42:33 critical Received Response to Broadcast
Maintenance Request, But no Unicast Maintenance opportunities received -
T4 timeout
2009-12-04 00:42:00 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-04 00:29:15 critical Received Response to Broadcast
Maintenance Request, But no Unicast Maintenance opportunities received -
T4 timeout
2009-12-04 00:28:42 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out
2009-12-04 00:26:58 critical No Ranging Response received - T3
time-out
2009-12-04 00:26:52 critical Received Response to Broadcast
Maintenance Request, But no Unicast Maintenance opportunities received -
T4 timeout
2009-12-04 00:26:20 critical Started Unicast Maintenance Ranging -
No Response received - T3 time-out

$Bill
12-04-09, 03:14 AM
Justin wrote:
>
> I unplug the modem and router, plug the modem back in, and then the router.
> I can get an external IP address.
> Once it craps out, I still have the ip address.
> I CAN get to the router setup fine.
> I have to hit renew several times before I get an IP, but its always
> been like that.

I think it's time to remove the router from the equation and
connect one of your PCs direct to the modem and see how that
goes. I'm guessing it will work fine.

Bill M.
12-04-09, 12:32 PM
On Fri, 04 Dec 2009 00:50:14 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>Bill M. wrote:
>
>>
>> So it could still be the router, the cable modem, or the ISP. If it
>> happens again, try to narrow it down further.
>>
>
>Thanks for the tip.
>Yes, it keeps happening now. I can get about two nimutes of internet
>usage and then it craps out.
>
>I unplug the modem and router, plug the modem back in, and then the router.
>I can get an external IP address.
>Once it craps out, I still have the ip address.
>I CAN get to the router setup fine.

You mean the router can get an external IP address assigned to its WAN
interface, right?

>I have to hit renew several times before I get an IP, but its always
>been like that.

This part seems to refer to getting a non-routed IP address assigned
to your PC by the router. It's normal for this assignment to take
10-20 seconds, so perhaps you're being impatient? You shouldn't have
to hit renew to make this happen after a router/PC reboot.

>Here's the log from 192.168.100.1
<snip>

I didn't see anything interesting in the modem log, but I wouldn't
mind seeing the numbers from the Signal page, specifically the
Downstream level and SNR, and the Upstream level.

And like $Bill said, simply (temporarily) removing the router and
connecting a PC directly to the cable modem might be a quick way to
rule the router in or out. Note that you'll have to reboot the modem
and reboot or renew the PC when you make the cabling change.

I assume the modem's various lights remain on and normal. I also
assume you've done a hard reset of the router, not the quick reset.
With the router powered up, you'll need to press and hold the reset
button for about 30 seconds to do a full reset and return everything
to factory defaults.

When you see your next outage, verify that you can access the router's
setup pages, if the router is still in the mix at that time. (Checks
the router's LAN side and its internal web server.) Then check to see
if you can access the modem's web pages. (Checks the router's WAN side
and checks the modem's LAN side and internal web server.) If all of
that works, what _exactly_ do you see when you try to access anything
on the Internet? Have you tried pinging your ISP's gateway address and
perhaps a known Internet address such as 4.2.2.2? (easy to remember IP
of a DNS server)

--
Bill

Justin
12-04-09, 04:22 PM
Bill M. wrote:
> On Fri, 04 Dec 2009 00:50:14 -0500, Justin
> <justin@nobecauseihatespam.com> wrote:
>
>> Bill M. wrote:
>>
>>> So it could still be the router, the cable modem, or the ISP. If it
>>> happens again, try to narrow it down further.
>>>
>> Thanks for the tip.
>> Yes, it keeps happening now. I can get about two nimutes of internet
>> usage and then it craps out.
>>
>> I unplug the modem and router, plug the modem back in, and then the router.
>> I can get an external IP address.
>> Once it craps out, I still have the ip address.
>> I CAN get to the router setup fine.
>
> You mean the router can get an external IP address assigned to its WAN
> interface, right?

Correct.

>
>> I have to hit renew several times before I get an IP, but its always
>> been like that.
>
> This part seems to refer to getting a non-routed IP address assigned
> to your PC by the router. It's normal for this assignment to take
> 10-20 seconds, so perhaps you're being impatient? You shouldn't have
> to hit renew to make this happen after a router/PC reboot.
>
>> Here's the log from 192.168.100.1
> <snip>
>
> I didn't see anything interesting in the modem log, but I wouldn't
> mind seeing the numbers from the Signal page, specifically the
> Downstream level and SNR, and the Upstream level.

Downstream Channel
Lock Status Operational
Modulation 256QAM
Channel ID 45
Provisioned Rate 6600 kbps
Symbol Rate 5360.537 Ksym/sec
Downstream Power -1.7 dBmV
SNR 37.6 dB
Upstream Channel
Lock Status Operational
Modulation 16QAM
Channel ID 1
Provisioned Rate 1100 kbps
Symbol Rate 2560 Ksym/sec
Upstream Power 38.8 dBmV

>
> And like $Bill said, simply (temporarily) removing the router and
> connecting a PC directly to the cable modem might be a quick way to
> rule the router in or out. Note that you'll have to reboot the modem
> and reboot or renew the PC when you make the cabling change.

I understand.

>
> I assume the modem's various lights remain on and normal. I also
> assume you've done a hard reset of the router, not the quick reset.
> With the router powered up, you'll need to press and hold the reset
> button for about 30 seconds to do a full reset and return everything
> to factory defaults.

If I do that I'll have to reenter all the WPA keys... Ugh.
But yes, that's one thing I have not tried.

>
> When you see your next outage, verify that you can access the router's
> setup pages, if the router is still in the mix at that time. (Checks
> the router's LAN side and its internal web server.) Then check to see
> if you can access the modem's web pages. (Checks the router's WAN side
> and checks the modem's LAN side and internal web server.) If all of
> that works, what _exactly_ do you see when you try to access anything
> on the Internet? Have you tried pinging your ISP's gateway address and
> perhaps a known Internet address such as 4.2.2.2? (easy to remember IP
> of a DNS server)
>

I do have access to the router's setup page, I confirmed that. When it
goes out, the first thing I do is release and renew the router's WAN ip
address - via the setup page.

Bill M.
12-04-09, 04:59 PM
On Fri, 04 Dec 2009 16:22:35 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>Bill M. wrote:
>> On Fri, 04 Dec 2009 00:50:14 -0500, Justin
>> <justin@nobecauseihatespam.com> wrote:
>>
>>> Bill M. wrote:
>>>
>>>> So it could still be the router, the cable modem, or the ISP. If it
>>>> happens again, try to narrow it down further.
>>>>
>>> Thanks for the tip.
>>> Yes, it keeps happening now. I can get about two nimutes of internet
>>> usage and then it craps out.
>>>
>>> I unplug the modem and router, plug the modem back in, and then the router.
>>> I can get an external IP address.
>>> Once it craps out, I still have the ip address.
>>> I CAN get to the router setup fine.
>>
>> You mean the router can get an external IP address assigned to its WAN
>> interface, right?
>
>Correct.

Thanks.


>>> I have to hit renew several times before I get an IP, but its always
>>> been like that.
>>
>> This part seems to refer to getting a non-routed IP address assigned
>> to your PC by the router. It's normal for this assignment to take
>> 10-20 seconds, so perhaps you're being impatient? You shouldn't have
>> to hit renew to make this happen after a router/PC reboot.
>>
>>> Here's the log from 192.168.100.1
>> <snip>
>>
>> I didn't see anything interesting in the modem log, but I wouldn't
>> mind seeing the numbers from the Signal page, specifically the
>> Downstream level and SNR, and the Upstream level.
>
>Downstream Channel
> Lock Status Operational
> Modulation 256QAM
> Channel ID 45
> Provisioned Rate 6600 kbps
> Symbol Rate 5360.537 Ksym/sec
> Downstream Power -1.7 dBmV
> SNR 37.6 dB
>Upstream Channel
> Lock Status Operational
> Modulation 16QAM
> Channel ID 1
> Provisioned Rate 1100 kbps
> Symbol Rate 2560 Ksym/sec
> Upstream Power 38.8 dBmV

Modem signal levels all look good. Thanks for posting this.


>> And like $Bill said, simply (temporarily) removing the router and
>> connecting a PC directly to the cable modem might be a quick way to
>> rule the router in or out. Note that you'll have to reboot the modem
>> and reboot or renew the PC when you make the cabling change.
>
>I understand.
>
>>
>> I assume the modem's various lights remain on and normal. I also
>> assume you've done a hard reset of the router, not the quick reset.
>> With the router powered up, you'll need to press and hold the reset
>> button for about 30 seconds to do a full reset and return everything
>> to factory defaults.
>
>If I do that I'll have to reenter all the WPA keys... Ugh.
>But yes, that's one thing I have not tried.

There's only one key, and heck, you can use Copy/Paste if it's hard to
type. :)


>> When you see your next outage, verify that you can access the router's
>> setup pages, if the router is still in the mix at that time. (Checks
>> the router's LAN side and its internal web server.) Then check to see
>> if you can access the modem's web pages. (Checks the router's WAN side
>> and checks the modem's LAN side and internal web server.) If all of
>> that works, what _exactly_ do you see when you try to access anything
>> on the Internet? Have you tried pinging your ISP's gateway address and
>> perhaps a known Internet address such as 4.2.2.2? (easy to remember IP
>> of a DNS server)
>>
>
>I do have access to the router's setup page, I confirmed that. When it
>goes out, the first thing I do is release and renew the router's WAN ip
>address - via the setup page.

Ok, don't do that. :)

I would suggest a slightly different mindset next time it happens.
Instead of focusing on fixing the issue, focus on troubleshooting the
issue. Once you know what the real issue is, the permanent solution
will likely become obvious.

--
Bill

Justin
12-04-09, 11:48 PM
Bill M. wrote:

>
> I would suggest a slightly different mindset next time it happens.
> Instead of focusing on fixing the issue, focus on troubleshooting the
> issue. Once you know what the real issue is, the permanent solution
> will likely become obvious.
>

Yeah, right.
Thanks for all the "help."
I am switching to Comcast's triple play so I will end up with a new
cable modem.
The connection has been working all day.

Bill M.
12-05-09, 01:56 PM
On Fri, 04 Dec 2009 23:48:22 -0500, Justin
<justin@nobecauseihatespam.com> wrote:

>Bill M. wrote:
>
>>
>> I would suggest a slightly different mindset next time it happens.
>> Instead of focusing on fixing the issue, focus on troubleshooting the
>> issue. Once you know what the real issue is, the permanent solution
>> will likely become obvious.
>>
>
>Yeah, right.
>Thanks for all the "help."

You're welcome.

>I am switching to Comcast's triple play so I will end up with a new
>cable modem.

I didn't see any issues with your current modem, so I don't expect to
see any major changes as a result of getting a new one. I know you
need it to support the triple play, but I'm just saying.

>The connection has been working all day.

Cool. Hope it stays that way. :)

--
Bill

Justin
12-05-09, 08:25 PM
Bill M. wrote:
> On Fri, 04 Dec 2009 23:48:22 -0500, Justin
> <justin@nobecauseihatespam.com> wrote:
>
>> Bill M. wrote:
>>
>>> I would suggest a slightly different mindset next time it happens.
>>> Instead of focusing on fixing the issue, focus on troubleshooting the
>>> issue. Once you know what the real issue is, the permanent solution
>>> will likely become obvious.
>>>
>> Yeah, right.
>> Thanks for all the "help."
>
> You're welcome.
>
>> I am switching to Comcast's triple play so I will end up with a new
>> cable modem.
>
> I didn't see any issues with your current modem, so I don't expect to
> see any major changes as a result of getting a new one. I know you
> need it to support the triple play, but I'm just saying.
>
>> The connection has been working all day.
>
> Cool. Hope it stays that way. :)
>

Yeah, I should be able to "narrow it down."
I'll send your advice over to my local police department. There's been
a murder. I'll tell them to narrow down the list of suspects to one -
from there the problem should present itself.

adjava007
12-29-09, 12:54 AM
My Linksys router and Comcast modem a working just fine. Hereís what I did.
First you must understand what you are trying to achieve. You are trying to make the modem think that it is talking directly to the computer. In other words, the Linksys router must look just like the Dell computer to the Comcast modem. This is primarily done by giving the router the same Mac address as a computer.
1. Plug the ethernet cable from the back of the computer straight into the cable modem. Make sure you are able to get to the Internet just like that. If not, something is wrong with your modem. A Comcast tech will be glad to help you with the modem which is his own equipment.
2. If the Internet is working, the modem is fine. On your computer screen, go to the command prompt (Start> Programs> Accessories >Command Prompt). Now youíre seeing a black DOS screen. Type in: ipconfig/release. Hit your Enter key. Wait 30 seconds and type in: ipconfig/renew Hit Enter again.
3. Now that you have a fresh ip address issued by the cable modem, type in: ipconfig/all. This will give you the physical address of your computer. It should look like this: 00.1A.A0.22.1A.8B. This is an example not the actual address. Write this address down.
4. Okay, plug the Internet cable from the back of your computer into your WAN connection socket. WAN is the first socket alone. LAN are the four sockets numbered one to four. While forums donít explain this I have no idea. Now plug the power cord to the router into the wall. youíre trying to get into the routerís configuration so you can change the Mac address.
5. You can usually access the router in Internet Explorer browser by typing the address: 192.168.1.1; Sometimes, if youíve tinkered with the firmware, your routerís main address may be different. If all else fails, hold down the reset button in the back of the router for 60 seconds. This should give the router back its factory defaults and now that address is good.
6. Assuming you are inside your routerís administration page, find the tab that says Clone Mac address. Enable the clone, but type in the address you wrote down. Just in case youíve forgotten, the physical address of your computer is the same Mac address we want to give to your router so the modem thinks itís talking to the computer. While youíre there in the router, make sure your security is WPA with your personal security code, at least 10 digits long. Write it down.
7. Save all settings. Get out of your router and turn it off, unplug it from the wall.
8. Now here is the tricky part. The cable modem is on. The router is off. So that you donít get confused, I am going to use color cables. Iím going to plug a gray ethernet cable into the back of my computer (Itís really already there). Iím going to plug the other end of the gray cable into the Number 1 LAN socket on my router. Iím going to plug a yellow ethernet cable into the cable modem. Iím going to plug the other end of the yellow cable into the WAN socket (standalone, not numbered) of my router. The yellow cable is transferring the internet to my router.
9. You can now plug the router back into the wall. Give the router time to light up, and grab the information from the modem, maybe 60 seconds. The modem is on; the routerís on. All we need now is a wireless adapter.
10. Plug your wireless adapter into the computerís USB slot. Tell the adapter to find all the networks. When you find your network, double-click or click Connect. The adapter screen should ask for the 10 digit security code you wrote down. Once you plug this code in, the screen should be connected to the network.
11. Now go around to each computer in the house and configure their individual wireless adapters to connect to the new network. Each time you will be asked for the 10 digit security code. Now everybody should be online.
So many people have helped me in these forums, Iím glad to give back. GOOD LUCK!!!