Cable Modems WRT54G + Comcast = random cutouts?

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Subject Author Date
WRT54G + Comcast = random cutouts? Justin 12-02-09
Posted by Justin on December 2, 2009, 1:23 am
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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

Posted by f/fgeorge on December 2, 2009, 5:51 am
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On Wed, 02 Dec 2009 01:23:10 -0500, Justin


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?

Posted by Justin on December 2, 2009, 5:00 pm
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f/fgeorge wrote:

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?

Posted by f/fgeorge on December 2, 2009, 6:19 pm
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On Wed, 02 Dec 2009 17:00:50 -0500, Justin


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

Posted by Justin on December 2, 2009, 11:16 pm
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f/fgeorge wrote:

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

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