Desperate Need of Assistance BRIDGING Asus RT-AC68 Router Comcast leasd Cisco DCP3939

[coldengrey]

Since my Aris TG 862 Died (IT Bridged 100% every time - used my Asus RT-AC68 WiFi AC Router for 6 months No Problem)

I've gone through 2 different Comcast wireless Gateways that simply WILL NOT BRIDGE CORRECTLY.... Previous to current Cisco, I had a Touchstone or Technicolor that a Tier 2 Tech told me 'was the only model that would not function in Bridge Mode'..

I have spent over 5 hours trying to configure my Asus RT-AC68 to function with Cisco DCP 3939 in bridge mode. Have spent 3-4 hours on phone with 3 DIFFERENT TECHS.. The only way I'm even online is I'm using Neighbors wifi...

--> Have factory / Hard Reset my Asus AC68 multiple times...

---> Asus IS FUNCTIONING!!! Have FULL ACCESS to LOCAL NAS and Media Servers.

---> My Window 7 laptop wifi adapter IS Functioning, using right now and works with ASUS for LOCAL Network

---> Simply cannot get Asus to Connect to Internet with Cisco Bridged!

PLEASE someone help... I am so close to cancelling my comcast that I've had, uninterrupted service with, for 15 years +

 

[hggomes]

Cannot understand the difficulty of doing that kind of connection, since its a 100% bridged device, it should work just like you're previous gateway.

What you see in syslog?

 

[KGB7]

I had Technicolor modem/router from Comcast, and Comcast bridged it in 5min. But, it was pointless, i only had it done because it was the only way to get the wifi turned off.


Question is, why do you need the Cisco bridged in the first place?


Does the Asus work with the Cisco if its not in bridge mode??


Other option is, buy your own Motorola Modem.

 

[Adamm]

I had Technicolor modem/router from Comcast, and Comcast bridged it in 5min. But, it was pointless, i only had it done because it was the only way to get the wifi turned off.


Question is, why do you need the Cisco bridged in the first place?


Does the Asus work with the Cisco if its not in bridge mode??


Other option is, buy your own Motorola Modem.

This is so you dont run into a double-nat situation which can lead to quite a performance loss in some situations as most ISP modems are a POS

 

[KGB7]

This is so you dont run into a double-nat situation which can lead to quite a performance loss in some situations as most ISP modems are a POS

There are several ways around double nat.

 

[sinshiva]

There are several ways around double nat.

that don't involve a performance hit..?

 

[TonyH]

Hi,
Once ISP puts the modem in bridge mode, OP , did you turn off modem, router and after waiting for 5 mins. or so turn them back on one after another? What is the symptom? Can you ping any thing outside? If you can still access modem with it's ip address, I don't think it is in bridge mode. I believe they have to download different f/w for bridge mode.

 

[jim769]

Hi,
Once ISP puts the modem in bridge mode, OP , did you turn off modem, router and after waiting for 5 mins. or so turn them back on one after another? What is the symptom? Can you ping any thing outside? If you can still access modem with it's ip address, I don't think it is in bridge mode. I believe they have to download different f/w for bridge mode.

No they do not need to load a different firmware to bridge the gateway. Normally you can bridge the gateway yourself but comcast has crippled the firmware and taken the ability away from the end user the only way to have it bridged is to call or chat with comcast and also find a rep that knows how to properly do the job and as we all know that will be the biggest problem.

 

[KGB7]

that don't involve a performance hit..?

yup.

Add the second router to DMZ and turn off firewall on ISP router.

 

[coldengrey]

I had Technicolor modem/router from Comcast, and Comcast bridged it in 5min. But, it was pointless, i only had it done because it was the only way to get the wifi turned off.


Question is, why do you need the Cisco bridged in the first place?


Does the Asus work with the Cisco if its not in bridge mode??


Other option is, buy your own Motorola Modem.

A) It may have been a Touchstone that the tech said "was only gateway that wouldn"t bridge", he said it - I thought it was a cop out and he just couldn't do it....

B) I need the Cisco Bridged so I can use my Asus AC68 w/o problems of Double NAT (as several have pointed out...)

Also, I cannot get my premium anonymous VPN service to function in a double NAT environment...

Lastly, I'm a moderately advanced user, but DO NOT have time to research, config, test, reconfig, ect using double NAT workarounds...
I have MULTIPLE NAS, several set top streamers/xboxes as well as a pain in the butt Seagate GoFlex Home Network External Hard Drive that doesn't ever function the same way or at all with a normal direct bridged non double nat - don't feel I should be forced to clean up all these problems AND PAY $8/month to lease the problem causing gateway modem...

C) I CANNOT buy my own Modem, as I have Comcast Triple Play, including VOIP - which they currently do not allow retail sales of any telephony devices

---> Least of all a MOCA Modem that is what the X1/X2 TV service leverages for functioning, I believe.... Though, as a side note - X1 is not worth it!!!
THE only reason I bothered to try was I wanted a 500GB Capacity HD DVR,but that's way off topic

 

[KGB7]

With triple play, you can use your own modem.
Connect new modem to coax cable in your house and call Comcast to activate it. The Cisco stays connected to Coaxial cable, so you'll have use a spliter or another coaxial jack in your house for new modem.
Comcast will deactivate the modem hardware only in the Cisco router and everything else will still work; phone and TV.

Connect Asus router to new modem. Connect VoIP phone to Asus router...if it is VoIP and not old school phone land line.

I have personally done this in the past with zero issues.



P.s.

Before I forget.

The Docsis 3.0 modems are more sensitive to db fluctuations on coaxial cable. So ask Comcast to send a tech and install a coaxial line power booster.
Commscope ac addaptor, it comes with a coaxial splitter that will have to be grounded outdoors.

 

[TonyH]

Hi,
Using DMZ is one way of doing it but when I received that modem with my package upgrade, I kept phoning ISP tech support playing dumb, think after 4th or 5th try, I got hold of a girl who knew what
I was talking about. Within minutes she d/l'd proper f/w. Done.

 

[jim769]

With triple play, you can use your own modem.
Connect new modem to coax cable in your house and call Comcast to activate it. The Cisco stays connected to Coaxial cable, so you'll have use a spliter or another coaxial jack in your house for new modem.
Comcast will deactivate the modem hardware only in the Cisco router and everything else will still work; phone and TV.

Connect Asus router to new modem. Connect VoIP phone to Asus router...if it is VoIP and not old school phone land line.

I have personally done this in the past with zero issues.



P.s.

Before I forget.

The Docsis 3.0 modems are more sensitive to db fluctuations on coaxial cable. So ask Comcast to send a tech and install a coaxial line power booster.
Commscope ac addaptor, it comes with a coaxial splitter that will have to be grounded outdoors.

Its never a good idea to use an amp with cable modems almost always amplifies the noise floor causing the snr's to tank and the connection to be unstable. If his signals are strong enough he may be able to split it and still be in spec.

 

[KGB7]

Its never a good idea to use an amp with cable modems almost always amplifies the noise floor causing the snr's to tank and the connection to be unstable. If his signals are strong enough he may be able to split it and still be in spec.

Comcast installs it for you for free. It eliminates future head aches as coaxial line is not as reliable with signal levels as FiOS.

 

[coldengrey]

Hi,
Using DMZ is one way of doing it but when I received that modem with my package upgrade, I kept phoning ISP tech support playing dumb, think after 4th or 5th try, I got hold of a girl who knew what
I was talking about. Within minutes she d/l'd proper f/w. Done.

This is the second response suggesting that there may in fact be a different firmware needed to bridge.... Wondering if this may be the case- cause the factory shipped equipment f/w sure isn't stable or wanting to bridge.

I've contacted Comcast executive offices now. Was given a case number and assured I'd be assigned a 'personal liaison' that would personally handle situation and stay in contact with me through a promised fix (which suggests to me that this is a known issue, and perhaps working with hardware/engineer team on an update or fix, but who knows....)
---> I do know that this XB3 'Gateway 2' is the only current X1 compatible device, so any bugs are going to cripple a lot of new X1 subscribers/users...

Please, by all means, keep suggestions and/or fixes coming. This is in NO WAY fixed or solved!!

Thanks - and I'll advise when/if a fix for anyone else with same problem..

 

[ParanoiA]

Get rid of the xb3 and go back to your leased modem that worked b4. Or use the xb3 for voice service only and grab a d3 modem for internet. Whoever tells you that you need an xb3 for x1 service is lying or is clueless. I install them everyday and can tell you I don't have one in my house and my x1 works perfectly. Also , just because you have x1 service does not mean you need an amplifier. Only the signal levels and cable wiring in your house will determine that. Just because some guy on the internet said his neighbor's best friend's kid's baybysitter's parents had an amplifier, doesn't mean you NEED one too.