Microsoft Teredo

[Carbo]

Never heard of this. My formerly always on, always fast, always reliable internet connection has suddenly gone south. Started about 2 days ago with random disconnects, and is happening now with increased frequency.
Called Comcast yesterday and was told the modem was bad. Went to the local office, picked up a new modem, and today the same issues persist, even more so. Called Comcast again and was told the new modem is probably defective. When I run a Windows diagnostic I'm receiving a message that MS Teredo has been disabled. Never having heard of this I did some research and enabled it. Issue persists, same message follows, and I enable Teredo again.
Any ideas what might be happening here? Thank you.
Windows 7, modem is an Arris TG862; router is a Netgear R7000.

 

[boomerang]

Comcast outage map

Same issue here for the past three weeks or so. Called and was told they are doing fiber optic work in the area. Internet cuts out and it also affect the television reception. Problems are usually around five minutes or less in duration.

Edit: You didn't happen to recently put the R7000 in use, did you?

 

[Carbo]

boomer, the R7000 router was installed about 3 months ago and has worked flawlessly. So I don't think it's a part of the issue. As an update, here's what's been happening since my original post.
After being told the new modem might be defective I went back to the local Comcast office. The rep there looked surprised when he saw I was returning a day old modem that he called "old and outdated", (model TG862G).
"Why would someone give you this?" he asked. "Let me get you a new one."
I left with Comcast's latest and greatest, I'm guessing, model TG1682G. It's a dual band unit, about the size of a small car radiator. Hehe. . .
Anyway, got home and installed it and since yesterday afternoon it has been working as expected. Haven't lost my internet connection once.
The one issue I noticed is that the Xfinity Home Hotspot that I have always had with the old modem is not available for some reason. It's good to have as a guest network. I'm just tired of talking to Comcast for the time being to get this straightened out.
The bigger concern is whether or not I continue to use the Netgear router, which has been great, or ditch it and just run with the Comcast unit?
Pros/cons?

 

[AnonymouseUser]

The bigger concern is whether or not I continue to use the Netgear router, which has been great, or ditch it and just run with the Comcast unit?
Pros/cons?

Using ISP's modem/router combo:

Pros

• Minimal to no setup required
• If it breaks, ISP will replace it
• One unit instead of two
• Often costs extra monthly
• May have hotspot functionality

Cons

• End users often have no control over functionality
• Some functionality completely missing or limited/disabled
• Many models have backdoors or other security flaws (1, 2)
• ISP may have backdoor LAN access even without a security flaw
• May have hotspot functionality

Using your own modem and/or router:

Pros

• Most are fully featured with no major limitations
• End user has complete control over router configuration
• Many routers can be flashed with third party firmware to enable additional functionality
• Can create one or multiple guest networks

Cons

• You have to buy it
• If it breaks, you have to replace it
• You will have to configure it (basic setup is usually very simple)
• Some have backdoors or other security flaws (1)

I personally do not like combos at all, but I am ok with using an ISP's modem if it costs nothing extra and I am using my own router with third party firmware installed. Regardless of firmware, using a separate modem and router usually affords additional security over combos.

 

[Carbo]

Thanks for the overview, AU.
I'm leaning to go with the Netgear. For starters, I purchased it only 3 months ago and I'd hate to relegate to the back of the closet so soon. Plus, it does what it's supposed to do damn well.
So with this in mind, how difficult will it be for a techno-dinosaur to set up bridge the Comcast modem and run off the Netgear? Simple for those in the know, I'm sure. But when talk turns to WANs, LANs, and DHCP, I'm thinking that splitting an atom would be easier.

 

[AnonymouseUser]

Thanks for the overview, AU.
I'm leaning to go with the Netgear. For starters, I purchased it only 3 months ago and I'd hate to relegate to the back of the closet so soon. Plus, it does what it's supposed to do damn well.
So with this in mind, how difficult will it be for a techno-dinosaur to set up bridge the Comcast modem and run off the Netgear? Simple for those in the know, I'm sure. But when talk turns to WANs, LANs, and DHCP, I'm thinking that splitting an atom would be easier.

Oh it's not that bad. You'll usually just set the modem to bridge mode, and follow the instructions from your router manufacturer to configure the router. It shouldn't take but a few minutes unless you have some unusual configuration.

 

[Mushkins]

Teredo is a tunneling protocol for sending ipv4 datagrams over ipv6 networks.

Are you sure you or comcast didn't enable some ipv6 WAN functionality on your modem/router?

 

[boomerang]

There is a possibility that only Comcast can bridge their combo device. It used to be this way, now, I really don't know because it's been a number of years since I rented one of their combo units. If you as the end user can't do it, Comcast can from their end.

I'm assuming you have their VOIP service? You can rent just a modem from Comcast if you have no need for their VOIP.

 

[AnonymouseUser]

There is a possibility that only Comcast can bridge their combo device. It used to be this way, now, I really don't know because it's been a number of years since I rented one of their combo units. If you as the end user can't do it, Comcast can from their end.

I'm assuming you have their VOIP service? You can rent just a modem from Comcast if you have no need for their VOIP.

Comcast provides instructions to enable bridge mode.

 

[VirtualLarry]

Teredo is a tunneling protocol for sending ipv4 datagrams over ipv6 networks.

Are you sure you or comcast didn't enable some ipv6 WAN functionality on your modem/router?

Comcast provides native IPv6 (dual-stack) to pretty-much all of their residential customers now. If your prior router didn't support IPv6, but your new one does, then that would make sense that you would be getting "Teredo disabled" messages. It's a Tunneling Protocol that is only used when you DON'T have IPv6 functionality. Since you now apparently DO, it's not needed.

 

[Carbo]

Update: newest modem, their latest model, started dropping the connection today, just like the previous two. Clearly not a modem issue.
Called support and the tech said she is picking up a weak signal and line interference. Wonder why the previous 8 calls over the past 3 days didn't show this? :\ Tech coming out on Saturday.
In the meantime I disconnected the router and hard wired the laptop into the Comcast box. We'll see what the tech comes up with on Saturday.