NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Sovby
Mar 05, 2022Aspirant
ORBI RBR 50 V2 Loses Ethernet connection
Ive been using this router for 3 or 4 months with everything working fine, but a few days ago it started giving me problems. i lose my ethernet connection to my windows 10 computer. It says ip addres...
plemans
Mar 05, 2022Guru - Experienced User
What xfinity modem is it connected to?
What firmware version are you on?
Sovby
Mar 05, 2022Aspirant
The xfinity modem is CGM4140COM. Here is what i found on xfinity website.
- Model Numbers: TG3482G and CGM4140COM
- Friendly Model Name: XB6
- Gigabit Ethernet Ports: 2
- Dual-Band WiFi Option: Yes
- 2.4 GHz Connected Client Limit: 30
- 5 GHz Connected Client Limit: 75
- Maximum Data Throughput: 1 Gbps
- WPS (WiFi Protected Setup): Yes
- Gateway/ Network Management Tool (http://10.0.0.1): Yes
- Xfinity xFi Eligible: Yes
- Xfinity xFi Advanced Security: Yes
- Xfinity app Activation: Yes
- Two Total Telephone Ports: Yes
- Battery Backup Capability (Xfinity Voice Only): Yes
- Link Cordless Phones (CAT-iq 2.0*): YesHome Hotspot Capable: Yes
- Compatible with Xfinity Home Pro Protection: Yes
- Compatible with Xfinity Home Self Protection: Yes
The download speed was 106mbps and the upload speed was 23.2 mbps using wifi. I'm not sure how to see the firmware. i googled it and it said to put in username & password. Im not a network administrator or anything but that doesnt sound very secure. is there a better way to see this? i'm using the netgear router so xfinity turned on briging i think its called?
- SovbyMar 05, 2022Aspirant
i also have a 8 port netgear GS308E Smart managed Plus switch.
- FURRYe38Mar 05, 2022Guru - Experienced User
Your ISP Modem already has a built in router and wifi. This would be a double NAT (two router) condition which isn't recommended. https://kb.netgear.com/30186/What-is-Double-NAT
https://kb.netgear.com/30187/How-to-fix-issues-with-Double-NAT
Couple of options,
1. Configure the modem for transparent bridge or modem only mode. Then use the Orbi router in router mode. You'll need to contact the ISP for help and information in regards to the modem being bridged correctly.
2. If you can't bridge the modem, disable ALL wifi radios on the modem, configure the modems DMZ/ExposedHost or IP Pass-Through for the IP address the Orbi router gets from the modem. Then you can use the Orbi router in Router mode.
3. Or disable all wifi radios on the modem and connect the Orbi router to the modem, configure AP mode on the Orbi router. https://kb.netgear.com/31218/How-do-I-configure-my-Orbi-router-to-act-as-an-access-point and https://www.youtube.com/watch?v=H7LOcJ8GdDo&app=desktop- SovbyMar 05, 2022Aspirant
i was under the impression that the modem is in bridge mode. I have spoken to xfinity about this.
FURRYe38 wrote:Your ISP Modem already has a built in router and wifi. This would be a double NAT (two router) condition which isn't recommended. https://kb.netgear.com/30186/What-is-Double-NAT
https://kb.netgear.com/30187/How-to-fix-issues-with-Double-NAT
Couple of options,
1. Configure the modem for transparent bridge or modem only mode. Then use the Orbi router in router mode. You'll need to contact the ISP for help and information in regards to the modem being bridged correctly.
2. If you can't bridge the modem, disable ALL wifi radios on the modem, configure the modems DMZ/ExposedHost or IP Pass-Through for the IP address the Orbi router gets from the modem. Then you can use the Orbi router in Router mode.
3. Or disable all wifi radios on the modem and connect the Orbi router to the modem, configure AP mode on the Orbi router. https://kb.netgear.com/31218/How-do-I-configure-my-Orbi-router-to-act-as-an-access-point and https://www.youtube.com/watch?v=H7LOcJ8GdDo&app=desktop- SovbyMar 05, 2022Aspirant
This setup has been working for a few months but now it does not like something. Either there ws an update or some other reason that has made things not compatiable.