Configuring the Comcast Cisco DPC3939B / DPC3941B Gateway The ideal network involves your Internet Service Provider (ISP) connecting onsite to a standalone modem that connects to a router, preferably a router recommended by Nextiva. DPC3941 by Cisco information and hardware knowledge base. We have Comcast Business service with DPC3941B cable modem hardware. The published PDF "Cisco Model DPC3941T DOCSIS 3.0 24x4 Wireless Residential Voice Gateway User Guide" shows the basic installation/hookup and Gateway configuration of the Wireless SSIDs and password keys.. I also have my gateway in bridge mode and it seems like this firmware no longer disables the wireless network when placed in bridge mode. The only solution we have seen is to either replace the router and gamble on a new Comcast router that maybe has fewer issues or, better yet, to place the router in 'bridge mode' and add your own router. Cisco SD-Access Scale Or follow our Static IP Addressguides to setup a static IP address. Recommended - Our free program will setup a static IP address for you. VPN University says. Reply. This equipment, by itself, is not recommended for use with VoIP service. Try enabling NAT. WARNING: Gateway operating in bridge mode! The DPC3941T is a wireless modem; of course you can get a Cisco router and connect it to the modem if you want to. The NAT feature may be disabled by default and will need to be enabled, and DNS servers need to be configured to a dependable set of DNS servers (Nextiva recommends Google DNS). We have a Cisco modem/router model DPC3941B provided to us by Comcast. the wireless component can be easily switched off and on through the GUI. DNS Server Configuration: If the DNS server being used is not up to date and consistent, devices (Poly phones in particular) can become deregistered. This can cause failed transfers, dead air upon call retrieval, among other issues. While there are limited options that can temporarily alleviate some of the above symptoms, for a permanent solution, this Gateway will need to be put into “Bridge Mode” and connected to a recommended firewall or router to provide quality audio. This range covers the IP addresses from 208.73.144.0 – 208.73.151.255, and 208.89.108.0 – 208.89.111.255. Enter the following credentials to log in: Reboot the router and any devices connected to the router. The question is: why would you want to put your modem in bridge mode? Integrate This session will cover MPLS Solution Overview on Catalyst 9000 platforms. When I enable the bridge mode, the cable modem disconnects, and internet is lost, as well as connection to the unit, so that I cannot access it and change the bridge settings, for example. When the SIP packet goes into the router, it is given another private IP address. Click HERE to get help with a password reset! Design This setting is only configurable on the DPC3941B. NOTE: The login address and credentials below are the default when the Gateway is shipped and can be modified by your Network Administrator. Don't need live help? I just need to be able to turn off the wireless function on the router. Do these routers allow you to turn off the wireless component? August 28, 2020 at 1:29 am. The ideal network involves your Internet Service Provider (ISP) connecting onsite to a standalone modem that connects to a router, preferably a router recommended by Nextiva. I set it to bridge mode after the installer did all his testing and left and the two wifi networks were still enabled. Mesh (192.168.5.#) left in Bridge mode (hence DHCP disabled). In bridged mode, the ACE bridges traffic between two VLANs in the same IP subnet. Start... DPC3941T is a wireless modem; of course you can get a Cisco router and connect it to the modem if you want to. So here's my dilemma, I work in a support role at a hosted voip(sip) provider and as of late I've had a ridiculous amount of customers reporting a whole slew of issues related to double NAT. Our team is ready to answer any questions you may have. My old Verizon config on the PA firewall was layer3 on both sides- "untrust" interface DHCP and "trust" interface static IP. Nextiva always recommends using the Google DNS servers of 8.8.8.8 and 8.8.4.4. I have read lots of articles and threads about extending your wifi range using an old router and confusion rules, most because people are going into detail about other routers. Comcast bridge mode doesn't function correctly 100% of the time. Shop backup batteries for telephone modems including Arris back up batteries and batteries for Cisco DPC3941t, DPC3939, DPC3212 + Comcast phone modems & more. Learn I called Comcast to have them remotely enable the bridge, and this is where I got lucky. Firewall Access Rules: The simplest way to ensure that traffic is not being blocked is to allow all traffic to and from 208.73.144.0/21 and 208.89.108.0/22. When I enable the bridge mode, the cable modem disconnects, and internet is lost, as well as connection to the unit, so that I cannot access it and change the bridge settings, for example. Grrr. ROUTER CONFIG Router is set to defaults/factory settings except for what Comcast did to set up the static IP address, etc. In this session we will deep dive into how you can leverage segmentation, layer 2 extensions, QOS, Multicast and advanced MPLS capabilities that are supported on Catalyst 9000 swit... Cisco SD-WAN Cloud OnRamp allows you to simplify and secure connectivity to cloud applications and public cloud. The modem is in bridge mode with the WiFi disabled. Comcast "either you get your static ip or true bridge mode, but not both" - HELP!!! Even the Comcast/Xfinity people did not know this, assuming it's true. This modem will not give IP addresses to devices which are not running Windows (such as Ipads, Iphones, Tablets, etc); the modem recognizes the devices but will not give them IP addresses so … It was so simple... Left column, select 'Connections" and then select 'Wifi', and then edit both of my private WiFi networks by 'Disable' the Wireless Network  All fixed. I need an ethernet router. The Cisco wireless router deals with the security of the network, delivering high speeds, and has eight downstream channels and four upstream channels. Cisco DPC3825 Upgrade -Basic Setup and Bridge Mode (Cable Modem Mode) I had a bit of confusion with the initial setup, and couldn't find a definitive source for a solution so thought I'ld post one. DPC3939/B, DPC3941B/T, DPQ3925C, DDR2200: Change firewall to LOW setting. Yes, only the DPC3941T is connected; I removed the router. I want to use my Hub One as primary router and connect old Technicolor as secondary router, wirelessly. Just for my understanding, you only have the DPC3941T connected, in bridge mode ? Even in DMZ/bridge mode issues remain. If the default credentials are not being accepted, speak with the Network Administrator who set up the network. Cisco DNA Center - Release Notes So, my experience is that putting a Comcast Business Internet DPC3941B in bridge mode DOES NOT disable any of the wifi. We have the house wired to avoid the use of wireless and any potential EMF issues. For the Comcast setup it took a bit more effort: And you have full Internet connectivity without another router being connected ? Interested in testing out the latest Cisco Cloud OnRamp solutions? 2. Is it true that I need a router inline with the cable modem to use the device in bridge mode? Cisco DNA Center Virtual Network (VN) Scale I will research those routers and get one. What might be some good choices for a Cisco router to use in this situation? 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