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Anyone have Comcast cable internet?

S

solideliquid

Limp Gawd
Joined
Mar 27, 2005
Messages
449
I subscribe to comcast cable internet and I use a Linksys WRT54G ver 3 router that is about two-three years old.

Here is my problem, every other day or so (sometimes sooner, sometimes longer) my connection to the internet closes through the router. I can plug into the modem directly and it works fine.

The only solution is to hold the reset button for 30 seconds and after that it works again. I'm not sure what the heck is going on, I've been on the phone with linksys twice, last time they told me to decrease the MTU to 1400 but a day later again it cut me off from the internet. I still see the router, can access the settings but nothing helps except reseting the thing.

I'm getting tired of this. Do you think its an issue with comcast (they have said its the router BTW "we don't offer support for linksys products)? Would buying a new router solve my issues?
 
IMO, it's likely the linksys router.

Having said that though, are you connecting via wired or wireless? If wireless, B or G?
 
I run DD-WRT on my WRT54G and it's great. I also have Comcast and I don't have any issues with their service and the router.

I've never actually run the stock firmware on the router, so I can't speak for it. But DD-WRT installed fine. If you are an advanced user and feel like giving it a go, it's not too bad to install. Just make sure you hunt down the proper install docs for that router.

With that said, I would agree with the above poster -- if you can plug directly into the modem and it works fine, it's either a setting on, or the router itself. You might want to try resetting it back to factory defaults and going from there. If it comes down to buying a new router, give DD-WRT a shot and see if you can salvage your existing router.
 
you said that when it fails, you plug directly into the modem and it works fine. are you restarting the modem when you plug the router back in? are you cloning your computer's MAC address?

have you called Comcast tech support to see if they are trapping any unusual traffic?
 
To the above poster:

When I plug the router back in usually I'll hold the reset button for 30 sec before I do and then to a power cycle. Yes, I clone my PC's MAC address as well when I set up the router through it's software.

My computers are on the WiFi network with mixed (two G and one B) adapters.

I have just installed the Tomato firmware and it installed without any problems. I'm going to give this a chance before I throw this thing in the garbage.
 
You don't need to clone MAC addresses with Comcast. Power modem off for several minutes...plug new device (such as router) into it...with the new device on. Power up modem..allow a minute to sych up. Release/renew...or power cycle/reboot, your new devices to it picks up a correct public IP and DNS info.
 
I often find that Linksys has a bad habit of using cheap capacitors you might wanna pop it open and see if they are ok.
 
Try doing this in order:

1. Unplug power from both the modem and router.
2. Wait about 5 mins after the two are powered off.
3. Next, ONLY plug power into the modem. You should see the activity LEDs blink in a certain fashion. at this time, the modem is requesting a new IP address from your ISP's DHCP Server.
4. Next, plug power into the router. Wait about a minute or so for it to boot up fully, then check your connection.

This should be helpful

good luck
 
Don't know if its been discussed, but are you using the latest firmware for the router?
 
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