Equipment (Modems,Gateways)
Modems, Gateways, and Networking Devices
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Bumpshot
Contributor

Need my Modem in True Bridge mode

Can Anyone Please put my Modem in " True bridge mode" .

 

Not just pass through mode.

 

I don't have a static IP. 

 

Tech support told me I have to have Static IP to put my  modem into  true bridge mode.

 

That does not souund right to me.

 

it is a Netgear CG3000DCR

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59 REPLIES 59
Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

HI Bumpshot.  The requested change has been made to the device.  Please let us know if you need further assistance.

 

Thank You

jaf1348
New Member

Re: Need my Modem in True Bridge mode

This is exactly what I was told about my Comcast-issued SMCD3G.  The tech on the phone said it couldn't be done without a static IP.  He said he put it in bridged mode, and at that point, all the LAN ports lost link status.  Supervisor said that in this highly specific case, the modem disables the LAN if set to bridged without a static IP.  Possible, I suppose, but this sounds absurd.  I also have Comcast residential service and have no problems with that modem in bridged mode.

 

Can you please help me and put my modem in true bridge mode as well?  Thank you.

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hi jaf1348.  On the Comcast Network Static IP address cannot be assigned to a bridged device.   Placing the device in <true bridge mode> disables all router functions of the gateway.  In <true bridge mode>  the public IP is passed directly to only one connected device, multiple connections to additional gateway LAN ports will create an IP conflict.  I will contact our Support Team to assist.  The approximate down time is 5 minutes and you will need to restart you router.  

 

Thank You

 

 

 

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jaf1348
New Member

Re: Need my Modem in True Bridge mode

Thank you for the reply.  This is exactly what I would have expecte.  The explanation I got was anything but expected.

 

In any event, the only technical issue was that all LAN ports were dead, so there was no way to connect my router to the modem.  I asked if a specific LAN port had to be used, but got the "static IP required" line again, and none of them showed link status anymore.

 

I'm fine with the downtime and restart.  Thanks again for providing a logical explanation.

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

HI jaf1348.  Our Tier 2 Support Agent has made the requested change to the gateway associated with this account.  Please restart your router to ensure propagation.

 

Thank You

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jaf1348
New Member

Re: Need my Modem in True Bridge mode

Thank you so much!  Everything is now working as expected.

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Bumpshot
Contributor

Re: Need my Modem in True Bridge mode

Sorry, I was talking with Comcast_John through PM And I thanked him through PM.  Forgot to come back here and post.

 

Comcast_John  helped and solved my problem that day.

 

Now, in TRUE BRIDGE mode. Not just PASS through mode. 

 

customer support (phone) are back wards and will only give you PASS through mode.They will tell you that is bridge mode and that is all that can be done. They aslo think you need a static IP to do True Bridge mode.

 

You need to ask in here  or ask for a tier 2 tech.

 

 

Just to Help understand:

 

Pass through mode - will turn off DHCP and Firewall . But you still are able to login to modem/Gateway(router).

 

True Bridge Mode - it turn off the Gateway(router). It makes it a (dumb) modem ( no settings ). you can not login to it.

that means your router is now doing all the work ((hand shaking ) settings ) to connect.

 

 

 

But, for service from Comcast_John was fast and solved my problem.

ahniwa
New Member

Re: Need my Modem in True Bridge mode

*sigh* I tried to call Comcast Support, say all the right words, and even point them to this thread. All they said, though, was that they couldn't do it without selling me a static IP ($15 a month). They also said I could buy my own Modem. Not super helpful. On the plus side, it only took them about 30 minutes to tell me they couldn't help me.

 

So if someone here could help me get my gateway set to True Bridge mode I would appreciate it.

 

I made my own thread for this over here: http://forums.businesshelp.comcast.com/t5/Equipment-Modems-Gateways/Need-my-gateway-set-to-True-Brid...

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hi ahniwa.  Please see your private message for additional information.  

 

Thank YOu

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Corey
New Member

Re: Need my Modem in True Bridge mode

I too am looking for a way to put my Netgear CG3000DCR into True Bridge Mode.  From what I read here, this should be possible as I have a dynamic IP.  However, I just got off the phone with customer support (not a pleasant experience).  I was told that the Netgear CG3000DCR could not be placed into True Bridged Mode.  Not too sure what to believe.

 

Corey

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

HI Corey.We can work with our Tier 2 agent to make this change.   As your network will be offline for approximately 5 min, give me a window for the agent tomake the change. 

 

Thank You

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Corey
New Member

Re: Need my Modem in True Bridge mode

Hi John,

 

Anytime is OK.

 

Thank you very much!

 

Corey

 

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

HI Corey.  The requested changes have been made to the gateway.  Please restart your router to ensure that it receives the Network facing IP address.

 

Thank You

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kb_banas
New Member

Re: Need my Modem in True Bridge mode

I need my modem to be put into bridged mode. I have my static ip set on my firewall already. Can you please make the change on your modem?

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hi kb_banas.  Your current network setup is not compatible with a <true bridge mode> device. Since your Static IP address are assigned to you Firewall/Router, you can disable DHCP on the Comcast gateway and utilize your Firewall/Router for all DHCP functions. 

 

Thank You

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LiveMore
New Member

Re: Need my Modem in True Bridge mode

Hi John I'd also like to have my Netgear set to True Bridge Mode. I do not have a static IP address. Please help. Thanks, Van
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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hi LIveMore.  Our Support Agent has made the requested change to the Netgear Gateway.  All router functions of the gateway have been disabled.  Please restart your router to ensure that it obtains the new IP address.

 

Thank You

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rmckeethen
New Member

Re: Need my Modem in True Bridge mode

I too would deeply appreciate some help getting my Comcast-provided SMC device into bridging mode.

 

When my company signed-up for Comcast Business service about a month ago, we leased a /28 block of global IPv4 addresses as part of our package.  We have a SonicWALL TZ 220 using one of the global IPs in our Comcast-provided range, and that unit has functioned just fine for the past three weeks.  This afternoon, while attempting to add a newer SonicWALL NSA 3600 to our infrastructure, I could not get that unit to work with another one of the global IPs within our assigned range from Comcast.  The SMC can see the device's IP and MAC address, as indicated by the SMC's diagnostic page, but PINGs and traceroutes from an external IP address go nowhere.  I spent a frustrating 30 minutes on the phone with Comcast support and was told that the SMC could not be configured as a simple bridge.  This thread seems to indicate that what I was told was inaccurate, so if the SMC can be remotely configured to function in bridged mode, again I'd be grateful for any assistance in getting that taken care of.

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FrancisTech
Visitor

Re: Need my Modem in True Bridge mode

This sounds like something I may need as well.  I have ports forwarded on my Netgear firewall that are not getting past the Comcast-provided modem.  Would Pass-Through mode defeat the Comcast modem NAT or would it need to be in True Bridge mode?  Or, better worded, what are the advantages of having the modem in True Bridge mode over Pass-through?

 

Thanks!

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Bumpshot
Contributor

Re: Need my Modem in True Bridge mode

Most people don't need  "TRUE bridge"  mode.  or even Bridge mode

 

 

In your case if you are only wanting to port forward to go through Comcast modem/router unit.

 

You only need to login in to your comcast modem/router and turn off Firewall. that will solve your problem

 

If you do not know how to do it. You can call and costumer service Rep  ( normal 800 number ) and just ask them to turn it off for you.

They can login to your CC M/R and change it for you.

 

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FrancisTech
Visitor

Re: Need my Modem in True Bridge mode

That makes sense Smiley Happy.  It still has the generic creds, so I'll make the change and see what happens.

 

Many thanks.

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wdanford
Visitor

Re: Need my Modem in True Bridge mode

Comcast_John, can you set my modem to bridged mode as well?  Is there some portal that I'm able to use to do this myself?

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

HI Will.  Please send me a private message with the RF MAC address and the account number and we can set the gateway to <true brideg mode>.  Please note that Gateways that have static IP assignments cnnot be placed in <true bridge mode>.

 

Thank You

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Highlighted
Groupj
Visitor

Re: Need my Modem in True Bridge mode

Hi,

 

I see from the forum, that the easiest way to get my gateway in true bridge mode is to ask on the forum. Please switch me to true bridge mode. we do not have the static ip anymore.

 

Thanks!

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hi Groupj.   The gateway has been placed in <true bridge mode>.  All router functions have been disabled.  Please restart you connected device to ensure that it obtains the public IP address.

 

Thank You

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Groupj
Visitor

Re: Need my Modem in True Bridge mode

should we be seeing a lot of hanging on web pages & inconsistent speeds after the gateway is in bridge mode?

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

HI Groupj.  The provisioning bootfile that determines the max up/down speed does not change nor does the DNS Servers. Bridge mode only, turns the device into a stand alone modem with single output functionality.  We can refer the issue to the Regional Support Center if the issue persist.

 

Thank You

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Groupj
Visitor

Re: Need my Modem in True Bridge mode

Thanks for the reply. I was putting a newer apple base station into service & it turned out to be the problem. When I went back to our older base station, everything is working fine again.

 

Just one question, now that comcast device is in bridge mode how often will our internal device get a new public ip address? It has changed several times & i wasn't paying attention to see if it was just coinciding with all the times I had to restart the base station to apply new settings or if it was happening on its own.

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JasenG
New Member

Re: Need my Modem in True Bridge mode

We had to have our modem replaced yetserday due to a lightning strike. Before we were in true bridged mode and I am trying to get the device back into bridged mode before tomorrow morning. Our issues started Friday morning and we typically have people working over the weekend. Can you help me? I would appreciate it!

 

We use the cable Comcast ciruit connected to our firewall WAN 2 and use for load balancing mode. When in pass-thru mode, load balancing can be turned on but we lose internet access immediately. I believe we must have had it set up initially in true bridge mode as it was working well with load balancing and maintained internet access?

 

 

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TaylorCo
Visitor

Re: Need my Modem in True Bridge mode

Looks like an older thread but since its near the top I will give it a whirl, I need my netgear in bridge mode as well. Like everyone else, support said it cant be done. 

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AAPS_Patty
New Member

Re: Need my Modem in True Bridge mode

Hi John,

 

You seem to be the go-to guy for this issue, we've been scouring the web and practically know the Teir 1 support script by heart now.  Maybe you can help as you have with others in this thread?

 

DPC3939B, no static IPs, we just need the cursed thing in (true) bridged mode. 
(Just switched over from Verizon, and it's been a nightmare ever since; we can't get our network back up, and the 3939 can't cut it for what we need)

 

At this point, we're ready to do anything, including buying a "dumb" modem off the shelf.  Folks on the phone have made every excuse in the book from "you need a static IP" and "it's against our policy" to "it'll break your remote access" (huh?!?)

 

Can you just wave your magic wand and make it all better?

 

Thanks for your time and consideration! Smiley Very Happy

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

TaylorCo, welcome to the forum.

 

We can assist you with this request but need some more infromation. Can you please send me a private message with your business name and account number?

 

Thank you

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hi TaylorCo.   The gateway has been placed in <true bridge mode>.  All router functions have been disabled.  Please restart you connected device to ensure that it obtains the public IP address.

 

Thank You

TaylorCo
Visitor

Re: Need my Modem in True Bridge mode

Thank you
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gstanley79
Contributor

Re: Need my Modem in True Bridge mode

Need mine in bridge mode as well.

 

 

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hi gstanley79.  The gateway has been placed in <true bridge mode>.  All router functions have been disabled.  Please restart you connected device to ensure that it obtains the public IP address.

 

Thank You

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DarkSeed
Visitor

Re: Need my Modem in True Bridge mode

Hi all, we have 1 static IP. 

I would like to place our Comcast gateway into bridge mode so that going foward my terminals and settings will all have the (192.168...)  right now, some get the 10.1.10... and others the 192.168...

I am not sure the name of the Comcast Gateway we have, I will post pictures here.  

If someone can answer a few questions, we will trully appreciate it!  Smiley Happy

After Comcast Gateway is put into bridge mode... Will the three LAN ports begind modem be disabled?  I am guessing only port #1 will be the only working port and go straight to the WAN of my router?

Also, Once gateway is in bridge mode, will i be able to do all my router settings from the 192.168 linksys address and no longer have to keep accessing the 10.1.10.1 router settings?  

And last question, Is there a difference between "true bridge mode" and "bridge mode"?  My goal would be to have the Linksys router do all the work and configurations, so I can eliminate computers automatically being assigned a 10.1.10... IP.

Can I do a "true Bridge Mode" with my (1) static IP?

thank you for all your help!

 

IMG_0785.JPG

 

IMG_0786.JPG

 

IMG_0787.JPG

 

 

 

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riverwood_church_IT
Visitor

Re: Need my Modem in True Bridge mode

I think I need my modem in true bridge mode as well.  I do want to confirm that after this, the modem will pass the ip address that it recieves from comcast to the device (my Router) that is connected to it via dhcp.

 

Thanks,

 

Jeremy

 

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hello DarkSeed welcome to the forum.

 

I just sent a private message reguarding this issue. Please let me know if you have any further questions.

 

Thank you

Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

 

Hello riverwood_church_IT welcome to the forum.

 

 

 

I just sent a private message regarding this as well, to clarify by putting a modem in true bride mode it will disable all routing functions via your gateway modem essentially allowing it to just push a single WAN IP to your network device. If you want this done feel free to reply to this or my private message.

 

 

 

Thank you

 

DarkSeed
Visitor

Re: Need my Modem in True Bridge mode

Thank you for all your help Comcast_Jacob! Smiley Happy

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houston1967
New Member

Re: Need my Modem in True Bridge mode

Hi we are about to start VOIP service with a 3rd party provider (8x8)  - the have asked that we use their reccomended router dlink655 which has Qos to give priority to the voice data .

We have the comcast cg3000dcr without a static IP  and I called comcast tech support to put it in "bridge mode" as instructed by my voip provider  - I have connected the router to the lan port of the comcast modem abd  the router does not seem to connect to the internet - what do I need to do to get this to work ? Do we have to use "truebridge mode or would the setting done over the phone by comcast level 1 rep  be sufficient

Thanks

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ryanwagner
New Member

Re: Need my Modem in True Bridge mode

Can I have mine put into true bridge mode as well? I have a dynamic IP, but it sounds like that is not a problem. Thanks!

 

Edit: Nevermind - I called in and surprising the phone support was able to do it in about 2 minutes.

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hello ryanwagner,

 

Thank you so much for the update! I glad to hear that your issue was resolved. Please feel free to continue to share with community.

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Community Manager
Community Manager

Re: Need my Modem in True Bridge mode

Hello houston1967 welcome to the forum!

 

When the modem is put in true bridge mode is disables all routing functions within the gateway and allows for one WAN ip adress for your router to use. 
If you would like this done please let me know.

 

Thank you

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tomG
Visitor

Re: Need my Modem in True Bridge mode

I need this done to my Modem/Router as well.

 

What do you need from me?

 

Tom

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MikeF74
New Member

Re: Need my Modem in True Bridge mode

We have an installation pending using the Cisco DCP3939B.  The modem/router is in place, but it turns out the building wiring wasn't completed on time.  So, I've been looking at the cusadmin interface and I think that I, like many others here, will need it to be put into "True Bridged Mode" to pass into our more-advanced firewall.

 

I only have experience with having a single static-IP, and now with Comcast we are moving up to multiple static-IPs and I don't know exactly how to handle this. Our firewall has the option to take in a VLAN connection, can we do that with this Cisco DCP3939B device?

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kriztofo
Visitor

Re: Need my Modem in True Bridge mode

I have a SMC gateway with my business class Internet but it's NAT functions are causing some issues with my wireless router (dual NAT issues) that is preventing me from establishing a remote VPN when I'm away from my office. Would getting my router put into True Bridge mode solve this issue? Thanks in advance.

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MikeF74
New Member

Re: Need my Modem in True Bridge mode

Our installation is today.  Can anyone tell me how to pass along multiple static IPs from the DCP3939B to our firwall?  Is it VLAN capable?

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