[lug] MAC question re: Comcast

D. Stimits stimits at comcast.net
Sun Jul 6 11:43:22 MDT 2003

Arlan Ramsay wrote:

> Sometime in the last 7 days or so, I began to have problems with programs
> running on a remote machine.  The ones that I know for sure are xdvi,
> pine, and an editor that produces TeX files and shows me approximate
> versions of what will be printed after TeX processing.  An example with
> xdvi is this:
> euclid>xdvi ch3v3
> Disconnecting: Corrupted MAC on input.

I wonder if maybe there is some kind of proxy ARP going on? Mostly I'd 
wonder if there is a hardware problem. Also, make sure firewalling is 
off for at least one test.

I'm doing fine on AT&T cable that switched to comcast, but I don't use a 
router, I use a bridge.

I should note that there are problems that occur only at night, where 
dhcp and dns disappear and packet loss goes up for short periods of time 
(this has been going on for three months, and comcast just now escalated 
the ticket after closing it twice as fixed, and never fixing it...they 
thought it was fixed cause they always tested it during the day).

D. Stimits, stimits AT comcast DOT net

> Here is some context.  I have been trying to set up a wireless home
> network using a D-link wireless router and a card with antenna in the
> computer. Until I get the driver for the D-link card working, I have been
> connecting it to the router via NIC and cable.  I thought the router might
> be the problem.  However, what just happened was with the NIC and cable
> directly to the cable modem.  I even shut down the cable modem and
> computer and started over.  It made no difference.
> When the cable service was ATT, I didn't have the router.  I don't know
> how to tell whether the problem is because Comcast has a different setup,
> because I have had the router, or something I haven't thought of.  Could
> it be that Comcast is deliberately sabotaging linux users?  With WIN98, I
> can't use any of the X programs, so finding out that WIN98 doesn't have
> the MAC problem wouldn't be good news for me to get my work done.
> rant********************
> Side remark: My lack of enthusiasm for Microsoft goes back to 1983 when
> they claimed they had a C compiler that would allow register values to be
> set and interrupts to be called.  As I recall, register A could be set but
> not much else could be done.  That was before Borland, which cost $50 or
> less versus $300 or more for Microsoft.
> endrant*****************
> TIA for any help.
> Arlan Ramsay
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