Xfinity ipv6

Many people are familiar with Comcast, one of the leading providers of cable and internet services in the United States. What some may not know is that Comcast also owns Xfinity, a...

There is no setting to disable IPV6 on Xfinity gateways. If you can find the standard the WiFi radio in the product uses (should be on the box somewhere, it will say something like 802.11b), and the issue is the radio in the product isn't compatible with WiFi 6, you can change WiFi standards the gateway is using the phone app.It has been this way for months. There has to be something wrong with the ipv6 config or some other settings. The modem updated last night in the middle of the night, so I thought I would give it another test. Same, just lags for 10-15 seconds for my android on wifi before it does anything. Load up any app, then wait a good 10-15 seconds for it ...Let's test the speed to your device. We'll measure the speed from our servers to this device. Results are often lower than plan speeds due to WiFi conditions and device capabilities. …... IPv6 configuration. If I go to Internet > IPv6 Setup, it's getting a proper address/prefix from my provider (XFINITY/Comcast). When I go to ...Go to Interfaces > LAN. 6. Select Track Interface in the IPv6 Configuration type. 7. Select the Track Interface (WAN) and leave the Prefix ID set at 0. 8. Save and Apply the Changes. 9. Go to Firewall > Rules and create a new rule by clicking the + button to make a rule for the WAN interface.Test Your Readiness for World IPv6 Day. IPv6 continues to receive an increasing amount of visibility around the world, in part related to an upcoming industry event called World IPv6 Day, which starts in the evening of June 7th in the U.S. While we continue to have a great deal of success with our IPv6 trials, the industry is concerned …

Choose System Preferences from the Apple menu. Click Network. Choose Wi-Fi or Ethernet (whichever one you're using) in the network connection services list. Click Advanced. Click TCP/IP. Then, click Renew DHCP Lease. Open a browser and connect to the Internet. Get complete instructions on how to release and renew your IP address when needed.How to Configure IPv6 in Your Home Network with ISP such as Comcast Xfinity. Dustin Casto. August 17, 2019. (Updated: May 16, 2022) Routers. OPNsense , IPv6. Photo by geralt from Pixabay. Fully Plug 'n Play KVM IP - Control any computer remotely, from BIOS to the desktop with the TinyPilot IP KVM. Starting at $399 · Learn more. Table of Contents. If 60 doesn't work, try 56, and then try 64. You can use the default ipv6 DNS servers Comcast provides, but I have mine set to the OpenDNS servers. The last screenshot is just showing all the default rules the USG set up for IPv6 interfaces. I didn't set anything up there and hopefully you don't have to either. IPv6. Primary DNS: 2001:558:feed::1. Secondary DNS: 2001:558:feed::2. Xfinity is the trade name of Comcast Cable Communications, LLC, a subsidiary of Comcast Corporation, used to market consumer cable television, internet, telephone, and wireless services provided by the company. Xfinity brand was first introduced in 2010; prior to that, all ...Technical Details for Our IPv6 Deployment. We have now started our pilot market deployment of IPv6, which is the first of several phases for our IPv6 deployment. This first phase will support certain types of directly connected CPE, where a computer is connected directly to a cable modem.I have my own MB8600 modem and Linksys WRT3200acm router with Google DNS specified. Even with this one, comcast uses the IPV6 DNS route to bounce IPV4 DNS requests to localhost (192.168.1.1) and insets its own search domain as well. Comcast / Xfinity now makes it impossible to escape their DNS usage. WE SEE YOU …When it comes to customer service, Comcast is one of the most reliable providers in the industry. With their 24/7 customer assistance, you can get help with any issue you may have ...Welcome to the Xfinity community! Our community is your official source on Reddit for help with Xfinity services. If you have questions about your services, we're here to answer them. We can help with technical issues, general service questions, upgrades & downgrades, new accounts & transfers, disconnect requests, credit requests and more.

Analysts have been eager to weigh in on the Services sector with new ratings on Comcast (CMCSA – Research Report), Service International (SCI –... Analysts have been eager to weigh...Not what the router can do. It depends on what the ISP configures IPv6 for there services. 2023-03-31 01:04 PM. I'm having trouble finding out the proper settings for ipv6 with Comcast on nighthawk rax70. It's currently set to off. Comcast keeps telling me to contact my router manufacturer.Jan 27, 2020 · The network portion uses the higher order bits of the address while the host uses the lower order bits. The division point is called the netmask in IPv4 and the prefix in IPv6. For IPv6: When the NIC is started and IPv6 is enabled w/ SLAAC support, the NIC generates a unique 64 bit address to be used as the host portion of the IPv6 address. I replaced my router today with an ubiquiti - amplifi dual-band mesh wi-fi system (HD Model with remote antennas). I am working on fine tuning the configuration. One item is the IPV6 settings. Xfinity appears to allow IPV6 so I selected it. Then it asks for the Network type and the two choices are DHCP6 and 6to4.Terminal. /ipv6 nd. set [ find default=yes ] disabled=yes. The next step is to setup DHCP client. Within a few seconds, you should see the prefix being allocated: Terminal. /ipv6 dhcp-client. add add-default-route=yes interface=ether1 pool-name=general-pool6 request=prefix use-peer-dns=no.Many people are familiar with Comcast, one of the leading providers of cable and internet services in the United States. What some may not know is that Comcast also owns Xfinity, a...

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Our business has been a ComCast customer for 8+ years, we have upgraded several time but most recently back in February we upgraded to 600mbps which required a new modem. Since then our IPv6 DHCP-PD has been broken. I have had multiple support tickets, L2 and L3 escalations. I have been told that Comcast does not service past the …Firmware version after the Comcast update is V2.01.02 and I'm including the event log and connection status below. The CM1100 is plugged into our firewall (Untangle v14.1.1) with IPv6 config set to Auto (SLAAC/RA). It's pulling a class A IPv4 address (73.x.x.x/23) without issue, but IPv6 is completely blank.We have now started our pilot market deployment of IPv6, which is the first of several phases for our IPv6 deployment. This first phase will support certain types of directly connected CPE, where a computer is connected directly to a cable modem. This will depend upon the cable modem (a subset of DOCSIS 3.0 cable modems, which will expand over …IPV6 - Prefix Delegation Size. Hello, I'm setting up IPV6 for my home network and by default, Comcast is assigning a 64-bit prefix delegation size, which allows only 1 subnet. I have multiple subnets at home and I want to add support for IPV6. According to the last post to this thread, it stated that Comcast no longer accepts hint for /60 prefixes.

WiFi security: For encryption, WPA2 and WPA3 are still considered secure at this time. That may change in the future. WPA3 is replacing WPA2, but not all devices can do it currently. WPA3 is recommended. Use WPA3 if your devices can, just to keep on the current security edge. IPV4 and IPV6 are just protocols.Are you worried about the safety of your online activities? There’s a number of ways to keep yourself safe while you’re using your Xfinity internet, and we’re here to help you out ...I had an issue with the Comcast wireless gateway and needed to do a factory reset. I lost all support for IPv6. I called in a ticket, it was escalated. The tech was unable to correct the settings on the modem remotely to enable IPv6. He scheduled a service call for a field tech to swap the modem and assured me that would fix the issue. …IPv6 is certainly supported on Comcast/Xfinity on the UDM. I have a score of 19/20 on IPv6 test. Configure as below and then reboot the UDM. You should have a 128/ under 2001: and your LAN should have a /64 under 2601:. Comcast (and other providers) are using IPV6 over 6rd. See: Comcast 6RD Configuration Instructions for IPv6. Here is an example dd-wrt config for use with the 2.4 pre-sp2 with a k2.6 build (14584M NEWD-2 K2.6 Eko) You can disable radvd from the management tab since this script creates the conf file and starts radvd. RV340 and Comcast Xfinity IPv6 Config. 01-03-2021 12:03 PM. I am using Comcast's residential service with an RV340 and a NETGEAR Nighthawk Cable Modem with Voice CM1150V. I have configured IPv6 to be enabled. I seem to be able to get a DHCP IPv6 address at the router (WAN port 1 reports an IPv6 address up in WAN1 config).Thu Jan 1 00:00:43 1970. Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC= [Edited: "Personal …Specifically, when Comcast's router sends an ICMPv6 message of type Router Advertisement, in that message it sets the MTU option to 9192. This is wrong because the IPv6 standard requires that value to be supported by segments. Since I'm connected to Comcast via a cable modem therefore it simply cannot handle this value.Jun 19, 2009 · This week at the North American Network Operators Group’s 46th meeting (NANOG46) Comcast demonstrated end-to-end IPv6 readiness on its network. Comcast is testing and trialing IPv6 by proactively checking the readiness of our software, hardware and systems. In some cases we’re replacing or upgrading equipment to ensure the transition is ... Comcast (or rather the DOCIS spec allows a value to be configured on a modem) only allows 1 MAC address to get DHCP lease, if you connected something like a laptop to configure bridge mode or for testing purposes you need to reboot the modem to clear the stored MAC address.LAN should have a default IPv6-to-any allow rule. Only install packages for your version, or risk breaking it. If yours is older, select it in System/Update/Update Settings. When upgrading, let it finish. Allow 10-15 minutes, or more depending on packages and device speed. Upvote 👍 helpful posts!

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for some reason, every router I have ever setup does not have ipv6 enabled from the factory, so just might need to enable it. if your router has the options, try "Native" for …Comcast (or rather the DOCIS spec allows a value to be configured on a modem) only allows 1 MAC address to get DHCP lease, if you connected something like a laptop to configure bridge mode or for testing purposes you need to reboot the modem to clear the stored MAC address.I figured I will share a trick that made my Comcast Busines IPv6 connection a bit more useful. I do have a Comcast Business connection and pay for a static /29 for IPv4. Note that Comcast does advertise, but not actually support static IPv6 addresses. So this is provided "as is" and "works for me". The IPv6 address assigned to the modem has ...Sep 24, 2019 · The Comcast IPv6 DNS servers will be prepended regardless of any other setting, static or dynamic. Additionally, all IPv6 DNS lookups are "intercepted" by Comcast and redirected to their IPv6 DNS servers. IPv6 cannot be disabled overall - even if devices have their IPv6 "turned off", the router will forward v4 to v6 and insert itself in the mix. On an almost daily basis I am getting IPv6 INPUT drop, IPv6 FORWARD drop, and WANATTACK drop in my router's firewall log and losing my network connection. Likely happening when using Microsoft Teams and Zoom for meetings using computer video and audio. Seen this same problem all over these forums and have yet to see a resolution.Nov 28, 2016 ... Next you have to configure ipv6 for all your networks. Go to Networks. open LAN (edit) and select the IPv6 interface type. Click save and your ...On further inspection, I am actually losing IPv6 connectivity every hour (not every two hours). Rebooting the modem restores IPv6 connectivity for an hour and then the modem stops routing traffic again. So my theory about the problem being related to 2 hour WAN DHCP leases may be incorrect. (Renewing a lease should not break connectivity …Enabling IPv6 on owned equipment. I have the Orbi 970 (BE 33000/BE 95) and looking to enable IPv6. What I'm not clear on, and netgear asked me to confirm with …IPv6 connection type. Native. (1) Select the IPv6 connection type as "Native". (2) Click [Apply] to save. (3) Login to router again, when IPv6 LAN setting appear IPv6 information, the settings of the "Native" are complete. Static IPv6. (1) Select the IPv6 connection type as "Static IPv6".

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NOW WiFi Pass. Access to millions of hotspots. No commitments. Special offer — only $10 for each 30-day pass. Save on Xfinity Digital Cable TV, High Speed Internet and Home Phone Services. Enjoy entertainment your way with great deals on Xfinity by Comcast.Sometime early 2022 something happened to IPv6 on my Xfinity Gigabit connection. I am not getting an IPv6 IP. The modem is a Netgear CM2000 which works great. I have tried to with two different routers. When using a Netgear Orbi router I am able to get an IPv6 address if I keep toggling IPv6 on and off several times.On an almost daily basis I am getting IPv6 INPUT drop, IPv6 FORWARD drop, and WANATTACK drop in my router's firewall log and losing my network connection. Likely happening when using Microsoft Teams and Zoom for meetings using computer video and audio. Seen this same problem all over these forums and have yet to see a resolution.2. Go to Advanced > IPv6. 3. Enable IPv6. 4. Select Dynamic IP (SLAAC/DHCPv6). 5. Go to Advanced settings, Select Auto in “Get IPv6 Address”. Select Enable in “Prefix Delegation”.Jun 12, 2021 · JKnott @lenhuppe. Jun 12, 2021, 6:38 PM. @lenhuppe said in Enabling IPv6 on Comcast home network: The "DHCPv6 Prefix Delegation size" defaults to 64 on the WAN side and the "IPv6 Prefix ID" defaults to 0 on the LAN side. The proper value depends on what prefix size they provide. This week at the North American Network Operators Group’s 46th meeting (NANOG46) Comcast demonstrated end-to-end IPv6 readiness on its network. Comcast is testing and trialing IPv6 by proactively checking the readiness of our software, hardware and systems. In some cases we’re replacing or upgrading equipment to ensure the transition is ...Oct 26, 2022 · Wan set to DHCPv6. DHCPv6 client configuration. mode basic. Request only an IPv6 prefix checked. Prefix delegation size 64. Send IPv6 prefix hint checked. Use IPv4 connectivity checked. On the Windows servers I used the prefix provided and set static IPv6 Addresses using the prefix with ::2 and ::3 for each. Page Loaded - Xfinity Speed Test - Check Your Internet Speed. Xfinity Speed Test. Let's test the speed to your device. We'll measure the speed from our servers to this device. Results are often lower than plan speeds due to WiFi … ….

May 28, 2023 · Check the Provide DNS configuration via radvd. Under Firewall-->Rules -->Lan. Add an IPv6 Lan Net entry to allow IPv6 traffic on your lan, just look at the IPv4 rule for a guide. Make sure you saved everything while doing this and reboot (again). When it comes back up, you should have IPv6 on the WAN interface. Static IPV6 only works with /64 or /60, NOT /56. So I've spent parts of 2 days trying to get this to work. I've had my pfsense 2.3.2-p1 box try to request a /56 from my netgear cable modem but I only ever get a /60 back (seen via debugging dhcp in pfsense). I have 2 "lan" interfaces "tracking" the wan, and if I set the wan to request a /60 ... Getting IPv6 working with Comcast/Xfinity. I had this working but then IPv6 lost connectivity through my clients. So far my setup is a follows: System -> Advanced -> Networking -> Allow IPv6. WAN Interface. IPv6 Configuration Type - DHCP6. Use IPv4 connectivity as parent interface - ticked. DHCPv6 prefix delegation size - 64. I had an issue with the Comcast wireless gateway and needed to do a factory reset. I lost all support for IPv6. I called in a ticket, it was escalated. The tech was unable to correct the settings on the modem remotely to enable IPv6. He scheduled a service call for a field tech to swap the modem and assured me that would fix the issue. …I figured out how to make ipv6 work with the Xfinity modem in bridge mode (or with any third party modem I guess too). The MAC address of the WAN Ethernet adapter that my router has (and that connects to the cable modem's ethernet) starts with 00:07:43 which is a prefix assigned to Chelsio and used for their adapters.The Comcast equipment is a Cisco type-BWG model-DPC3939B Business IP Gateway. It's readouts show the IPv4 and IPv6 static delegations. I'm using VyOS as the routing software on my router/firewall (which is plugged in to one of the LAN ports on the BIP Gateway). It's an OSS fork of Vyatta, parallel to Brocade or Ubiquiti.JKnott @lenhuppe. Jun 12, 2021, 6:38 PM. @lenhuppe said in Enabling IPv6 on Comcast home network: The "DHCPv6 Prefix Delegation size" defaults to 64 on the WAN side and the "IPv6 Prefix ID" defaults to 0 on the LAN side. The proper value depends on what prefix size they provide.Oct 26, 2022 · Wan set to DHCPv6. DHCPv6 client configuration. mode basic. Request only an IPv6 prefix checked. Prefix delegation size 64. Send IPv6 prefix hint checked. Use IPv4 connectivity checked. On the Windows servers I used the prefix provided and set static IPv6 Addresses using the prefix with ::2 and ::3 for each. Xfinity ipv6, Comcast’s Speedtest Now Breaks Out IPv6 Speed Vs IPv4 Speed. UPDATE: 18 March 2021 – Back in 2014 when I wrote this post, it outlined an excellent new tool Comcast had released to compare the speed of your connection over IPv4 versus over IPv6. At the time they were rolling out IPv6 into their networks and were also active with a range of ..., The Comcast IPv6 DNS servers will be prepended regardless of any other setting, static or dynamic. Additionally, all IPv6 DNS lookups are "intercepted" by Comcast and redirected to their IPv6 DNS servers. IPv6 cannot be disabled overall - even if devices have their IPv6 "turned off", the router will forward v4 to v6 and insert itself in the mix., You can find Comcast listings on Comcast.com or on LocateTV.com. To view Comcast TV listings, navigate to Comcast.com and click the Check TV Listings link., Not what the router can do. It depends on what the ISP configures IPv6 for there services. 2023-03-31 01:04 PM. I'm having trouble finding out the proper settings for ipv6 with Comcast on nighthawk rax70. It's currently set to off. Comcast keeps telling me to contact my router manufacturer., Test Your Readiness for World IPv6 Day. IPv6 continues to receive an increasing amount of visibility around the world, in part related to an upcoming industry event called World IPv6 Day, which starts in the evening of June 7th in the U.S. While we continue to have a great deal of success with our IPv6 trials, the industry is concerned that a ..., for some reason, every router I have ever setup does not have ipv6 enabled from the factory, so just might need to enable it. if your router has the options, try "Native" for …, Windows 10/11. Press Windows and R key at the same time to open the Run box. Type CMD and press Enter. Type ipconfig/release in the Command Prompt window. Press the Enter key. Type ipconfig/renew. Press Enter. Type Exit and press Enter to close the window., I cannot find the settings on the router using the local web interface, using the Xfinity app, or the Xfinity website. I dont have time to explain why I need to do this as this is not a debate on why I should use IPv6 or how to get around the many issues I have because of it, I just simply would like to know how to disable IPv6 as a Xfi customer., WiFi security: For encryption, WPA2 and WPA3 are still considered secure at this time. That may change in the future. WPA3 is replacing WPA2, but not all devices can do it currently. WPA3 is recommended. Use WPA3 if your devices can, just to keep on the current security edge. IPV4 and IPV6 are just protocols., In this tutorial, and if you have Comcast/Xfinity High Speed Internet and a new cable modem, you have IPv6 support. Go to www.comcast6.net it will display your …, Disabling IPV6 temporarily. I am trying to connect my smart home device (Litter Robot) to my WiFi. The device can only access 2.4 GHZ connections and IPv4 router. I am currently using the Dual Band XB3 Gateway which has the 5 GHZ AND 2.4 GHZ connections. The only problem I have is that I can't disable the IPv6 to allow my device …, Comcast's IPv6 actually works really well, a lot of providers do not implement it as nicely as they do. A few IPv6 tips though as a first-timer: Make sure you have proper firewall rules in place on your router, because with IPv6 each computer\device on your network will have a globally routable IP address (which they currently don't)., FW.IPv6 FORWARD drop and FW.IPv6 INPUT drop. I'm currently using the provided cable and the provided equipment. My desktop is hardwired to the modem. I think I need a technician to help me fix this problem. Thank you. P.S. Ironically, the internet cut off yet again when I tried to post this., 2. Go to Advanced > IPv6. 3. Enable IPv6. 4. Select Dynamic IP (SLAAC/DHCPv6). 5. Go to Advanced settings, Select Auto in “Get IPv6 Address”. Select Enable in “Prefix Delegation”., Not what the router can do. It depends on what the ISP configures IPv6 for there services. 2023-03-31 01:04 PM. I'm having trouble finding out the proper settings for ipv6 with Comcast on nighthawk rax70. It's currently set to off. Comcast keeps telling me to contact my router manufacturer., Jul 8, 2013 · If you are a Comcast customer, you simply need to go to www.comcast6.net where you will see at the top of the page the current status in your region. Here is a screen shot from one of our team members who is a Comcast customer: As shown in Comcast’s blog post, if both your regional “ CMTS ” and your cable modem support IPv6 you will see ... , The DCP3941B is broken on both IPv6 and IPv4. I wish Comcast would simply provide a way to turn off the $#@! IPv6 firewall rules (I'm guessing they are doing an "allow all" rule when you say you don't want firewalling in the GUI, but the problem is they are still apparently doing state inspection - I want to turn that stuff off so it works)., What IPv6 configuration does Comcast currently offer if you are using a single static IPv4 address, or a dynamic IPv4 address. Currently, I do have a static IPv4 /29 (5 IP addresses), and I am gett..., I figured I will share a trick that made my Comcast Busines IPv6 connection a bit more useful. I do have a Comcast Business connection and pay for a static /29 for IPv4. Note that Comcast does advertise, but not actually support static IPv6 addresses. So this is provided "as is" and "works for me". The IPv6 address assigned to the modem has ..., Obtain an Internet Protocol (IP) address automatically (both IPv4 and IPv6) Obtain the Domain Name System (DNS) server address automatically. Verify the IP address is Dynamic Host Configuration Protocol (DHCP) Enabled. Clear all the Windows Internet Name Service (WINS) addresses. Set the Network Basic Input/Output System (NetBIOS) option to ..., Jan 27, 2020 · The network portion uses the higher order bits of the address while the host uses the lower order bits. The division point is called the netmask in IPv4 and the prefix in IPv6. For IPv6: When the NIC is started and IPv6 is enabled w/ SLAAC support, the NIC generates a unique 64 bit address to be used as the host portion of the IPv6 address. , The Comcast IPv6 DNS servers will be prepended regardless of any other setting, static or dynamic. Additionally, all IPv6 DNS lookups are "intercepted" by Comcast and redirected to their IPv6 DNS servers. IPv6 cannot be disabled overall - even if devices have their IPv6 "turned off", the router will forward v4 to v6 and insert itself in the mix, Follow these steps to configure Windows 10 network settings on your computer. Right-click on Start. Select the Network Connections option. Double-click on the network connection you are using. Click Properties (you must be logged in as Administrator, or you will be prompted to log in). Click the Networking tab., 24 Messages. Saturday, March 6th, 2021 9:37 PM. Closed. How to setup IPv6 without Comcast DHCPv6 prefix delegation. With the troubles I've had with IPv6 with this week's …, IPv6 Configuration Type: DHCP6 Prefix Delegation size: 56 (I found somewhere this was the size supported by Spectrum) Send IPv6 prefix hint: checked Set the LAN interface to track WAN Once it was working, I very quickly discovered that I …, IPv6 may be disabled to resolve problems associated with: Name resolution – most routers are still configured to use IPv4, so IPv4 requests must be translated to IPv6 ISP does not support IPv6– even major ISPs like AT&T, Xfinity, Verizon, and Spectrum are still working on adding better support and infrastructure for IPv6. If you use a small ..., Xfinity Network upgrade / DHCPv6 change. A couple of months ago I received a notice that Xfinity was upgrading its network in my area with a middle of the night disruption. Next day, my IPv6 stopped working. I tracked it down to a change in the way DHCPv6 server worked. It seems the address of the DHCPv6 server moved from a …, I'm reaching out for some advice on setting up IPv6 with my Comcast Xfinity router. I've noticed that we're assigned a /56 IPv6 prefix in the Xfinity settings. However, Xfinity seems to restrict us to a /64 prefix for DHCPv6 or SLAAC. Our goal is to utilize our own DHCPv6 server and distribute the full /56 block into multiple /64 subnets., Choose System Preferences from the Apple menu. Click Network. Choose Wi-Fi or Ethernet (whichever one you're using) in the network connection services list. Click Advanced. Click TCP/IP. Then, click Renew DHCP Lease. Open a browser and connect to the Internet. Get complete instructions on how to release and renew your IP address when needed., Sunday, March 19th, 2017 7:00 PM. Lost my IPv6 /56 this evening. Sometime around 6pm Pacific time this evening, I noticed some odd connectivity issues to certain sites. The problem appears to be that I lost my IPv6 /56 PD, as my OpenBSD router running wide-dhcpv6 dhcp6c is now only receiving a /64. My IPv6 dhcp6c configuration hasn't …, This week at the North American Network Operators Group’s 46th meeting (NANOG46) Comcast demonstrated end-to-end IPv6 readiness on its network. Comcast is testing and trialing IPv6 by proactively checking the readiness of our software, hardware and systems. In some cases we’re replacing or upgrading equipment to ensure the transition …, Dec 14, 2023 ... If you have to setup a dhcpv6 server inside, use a /64 prefix. Set an arbitrary range -- something like ::1000 to ::2000. I use ravd to provide ..., Welcome to the Xfinity community! Our community is your official source on Reddit for help with Xfinity services. ... (Arris SB8200). I have a Google WiFi mesh system, that i activated IPv6 on, but it says it's not getting an ip from the modem. I have rebooted both the modem and the routers, and still nothing. I contacted Comcast support, and ...