[PLUG] Comcast troubles

Sean Whitney sean.whitney at gmail.com
Tue Dec 6 02:08:33 UTC 2005


Sounds more like a problem localized to his particular upstream rather
than a problem experience by everyone on the CMTS.  If these conditions
continue then by all means call in an get some attention on the issue.


Sean

On Mon, 2005-12-05 at 17:20 -0800, Keith Lofstrom wrote:
> On Mon, Dec 05, 2005 at 11:56:29AM -0800, Richard C. Steffens wrote:
> > Has anyone else been having trouble with Comcast this morning? Several 
> > times, I've looked over at the cable modem and found it going through 
> > the sequence it uses to establish a connection. This seems to happen 
> > shortly after I've successfully received some e-mail, and am trying to 
> > send a reply.
> > 
> > The solution has been to power down the cable modem for 10 seconds or so 
> > and then power it back up.
> 
> I've been downloading through Comcast all day.  So somewhere between
> you and the Phat Pipe (possibly even your computer or your power feed)
> something is wonky.  From my firewall:
> 
> [root]# ifconfig eth0
> eth0      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
>           inet addr:xx.xx.xxx.xx  Bcast:255.255.255.255  Mask:255.255.248.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:197946757 errors:7721 dropped:0 overruns:7722 frame:7721
>           TX packets:28652603 errors:0 dropped:0 overruns:0 carrier:1
>           collisions:0 txqueuelen:1000
>           RX bytes:2671832718 (2548.0 Mb)  TX bytes:991186072 (945.2 Mb)
>           Interrupt:3 Base address:0x300
> 
> [root]# uptime
> 17:04:29  up 103 days, 18:08,  1 user,  load average: 0.10, 0.05, 0.01
> 
> Assuming that you have a linux box talking to the cable modem, you might
> look at ethereal or tcpdump output and see if somebody else is dragging
> down the line, or attacking your box.  You might also put a cheap little
> 4 port ethernet hub between your computer and the cable modem, so you
> can watch the blinky lights, or monitor the traffic with another computer.
> 
> Keith
> 
-- 
If a nation values anything more than freedom, it will lose its freedom;
and the irony of it is that if it is comfort or money it values more, it
will lose that, too.
                -- W. Somerset Maugham





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