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[ddmiller67]

Alrighty... Was running a DGL-4100. Having problems connecting to Comcast with it any time I edited the settings. The level of edits I could pull off were variable. sometimes even editing the password wasn't possible. I acquired a DGL-4500 because I needed wireless and I was hoping this would solve the problem. I have apparently fallen down the rabbit hole...

The DGL-4500 takes 2-3 minutes for the router to negotiate a connection with the cable box (ARRIS TM722). When it does connect, the speed is limited to 10Mbps. I have a 30Mbps connection. I have plugged the DGL-4100 back in and verified everything is ok with 30Mbps speed. FWIW, the DGL-4100 creates the DHCP connection immediately.

I have reset all the boxes multiple times. the DGL-4500 appears to be happier connecting without any settings modifications. Below are my answers to questions I see discussed regularly on this forum, including another connection speed.

Are you testing wired or wireless connection? Wired through a D-LINK DGS-1024D switch
What HW version is your router? A2
What FW version is currently loaded? 123 NA (behavior the same on 121NA)

What ISP Service do you have? Cable or DSL? Comcast cable 30/5 service
What ISP Modem do you have? Stand Alone or built in router? Stand Alone phone/cable
What ISP Modem make and model do you have? Arris Touchstone TM722 A

Ensure DNS IP addresses are being filled in under Setup/Internet/Manual? I got the DNS addresses from the last time this connected and entered them in by hand. The DNS IPOs show up when it connects via DHCP, of course.

Turn off QoS options. Running the default setups. Not sure where these are.

Turn off Advanced DNS Services if you have this option Setup/Internet/Manual. Off by default

Turn on DNS Relay under Setup/Networking. Done.

Setup DHCP reserved IP addresses for all devices on the router. Done

Ensure devices are set to auto obtain an IP address. TiVos don't work this way reliably, so they are fixed IP. I have taken them off the network to see if that's the problem and the problem does not go away.

Set Firewall settings to Endpoint Independent for TCP and UDP. Done.

TIA for any help you can provide.

[ddmiller67]

Added info: I have the advanced setting at 10/100/1000 auto detect. If I change it to 100, it will not connect to the modem

[FurryNutz]

I see you have an Arris ISP modem...do you have Internet phone service thru this modem by chance? If you do then it's not a stand alone modem and probably has a built in router.
Have seen issues with these modems and using external routers. My father has an arris modem and while there I noticed I had to Mac Clone the router to the modem before it would connect correctly. Only way it seems to work. Possible this could not, not sure though.

[ddmiller67]

That would explan why I was having trouble with my DGL-4100 only through the Arris and not the the older standalone.

The status page for the Arris has three MAC addresses -- LAN, Cable, and MTA. Which one should I try?

[ddmiller67]

Well [insert sheepish grin], it turned out to be a wiring problem... I have no idea why it ran 30Mbps with the DGL-4100 but wouldn't ON THE SAME CABLE with the DGL-4500, but there it is.

Using another cable wasn't simple to check as the modem is in the basement NOT near to any computer and the router is in a server closet upstairs. I carted a laptop, the DGL-4500, all the power cables, and the two patch cables that came with this equipment down to where the cable model was. Strung a few power cords and plugged 'er all in.

Voila, 30Mbps.

After much swearing (I've been working on this all day), and a quick replacement of both ends of the cable run from the modem to the server closet, the problem is fixed. Instant access, 30Mbps service.

No hiccup in speed with the older router, but a problem with the new one... ON THE EXACT SAME CABLE. Wouldn't believe it if I didn't see it myself.

Thanks for the quick reply anyhow!

David

[FurryNutz]

Glad you found the problem. I would recommend getting new CAT6 cabling if possible. Shortest length between modem and router is preferred. I use a 1ft between mine, hehe. Enjoy man.

[XS]

Glad you found the problem. I would recommend getting new CAT6 cabling if possible. Shortest length between modem and router is preferred. I use a 1ft between mine, hehe. Enjoy man.

Hey Furry,
Did you have some bad experience with a long CAT5E cable from your modem to your router?  The reason I ask is because, Cox installed my router in my wiring panel and plugged it there.  The CAT5E cable is ran to my entertainment center and that is where I have my router.  If I had to guess probably a 50' Cat5E cable

[FurryNutz]

Not really, just decides to upgrade to CAT6 since it's cheap and like the bit of overhead on signal and distance and speed for GB connections. Nothing wrong in using CAT 5e if thats what you have. Works great on Gb connections too. Just think if it like this, CAT 6 is the best and is affordable. However if  5e is working for you then keep it. If you get to a point that maybe your doing to do some re-wiring or maybe doing a new addition to your house and want to put wiring in, then maybe at that point CAT 6 is a great investment. Totally not necessary to run right out and get 6.
Was told that if you can keep the ISP modem and router as close as possible, run the shortest length of cable between them. If your geek tweekers like some of us on here, you kinda get into doing things that avg users won't.

[Hard Harry]

I am glad you got it all worked out..but I just have to ask. A 24port 230$ switch on a residential account? How many computers do you have man?! LOL

[ddmiller67]

Way too effin many...! It's not just the computers, it is all the TiVOs and the Cat5 plates we put in all over the house (nearly one per outlet) when we did the remodel. Yes, I could've just done it with wireless, but since the walls were open and you never know when you're gonna move the TV...

[FurryNutz]

I agree man, going thru a new addition build, soon as the ruff-in inspection is done, CAT 6 all the way man. My 24pt switch will come in handy. Can't wait till home theater is done.

[Hard Harry]

I agree man, going thru a new addition build, soon as the ruff-in inspection is done, CAT 6 all the way man. My 24pt switch will come in handy. Can't wait till home theater is done.

Ahh, you have inhouse wiring. That makes sense.

[FurryNutz]

I will...exhisting house is well, kinda messy. 

[Hard Harry]

Can't be worst then the guy I knew who ran his ethernet through his plumbing, water and all. No joke. And he wondered why he had packet loss.

[ddmiller67]

We used to run indoor 10Base-T through garden hose to shield it from UV and the elements. Was cheaper than buying outdoor rated cable. We once wired a three-location business by stringing black garden hose in the utility poles across two alleyways. We zip-tied it to the cable standing on a ladder atop a box truck. It worked flawlessly for almost six years.

Another one we did the same thing but fished it through a culvert. That one worked great until the culvert froze solid. It crushed and cracked the hose.

One of my favorites was when we delivered two cases of beer to a city crew who was standing around waiting for a supervisor who was on vacation to dig up a short piece of alley so we could run cable between two buildings. Popped it in the garden hose and through some 3" PVC (along with a rope so we could easily fish more cable through). They dug it, we dropped it in, they paved it over. Total time was less than 60 minutes!

Ah, youth...