I recently purchased an Orbi AX4200 system with the RBR750 router and 2 satellites. I have only had it a few days. I have the router plugged into an ethernet port on my Xfinity router. (Forget which Xfinity/comcast router but one of the latest). The issue is that when I am going through the Orbi system and VPN'd into my work....Opening or starting a webex meeting with the webex client either doesnt work...or takes up to 5 minutes to load. This is defintiely an issue with the Orbi as I can plug directly into my Comcast router everythign works great. I chatted with tech support 2 days ago and they had me update the DNS server addresses on the Orbi from the Comcast DNS addresses that were in it to 8.8.8.8 and 8.8.4.4. This seemed to resolve the issue...but now its back. The addresses are still in there....so unsure whats going on. I will note that we use a Checkpoint VPN client and we do Split Tunneling with Webex. So webex isnt sent through the VPN tunnel but should be going directly out the internet. I'll be calling support at some point but also throught I'd ask the community. This is a deal breaker for me on keeping this if it cant be resolved.

Thanks again. So I have my cable modem in bridge mode and am back to the router mode for the Orbi. A little concerned as the first time i loaded a webex meeting it was pretty slow...but eventally came up. Fast after that. We'll see how work goes tomorrow but hopefully this will do the trick. Thank you very much for all your help. Greatly appreciated.

You just need to choose 1 option depending on what services you use. If you're using xfinitys security services/parental controls/etc (not sure what else they offer on their boxes) then you'd want to leave it as router with the netgear in AP (access point) mode. If you're using netgears parental controls/circle/armor, then you'd want it as router with the xfinity in modem only mode. Or if you're using both, you can go into the xfinity's and put the netgears IP address into the xfinity's dmz. little more challenging option but also an option. You can even try swapping to see which works better for you. Try it xfinity (modem only)----->netgear router modexfinity (modem/router combo)----->netgear (ap mode) I switch stuff around a lot because I have time and like to play. But that's just me.

Thanks again for the help. I'm not using any of those so I'll just play around when i get time today and see what works for me and if either results in my Webex issue going away. Thank you for the quick replies!!!

So I put my Orbi in AP mode and that has seemed to resolve the issue. Thank you. Regarding that list: Wow. Thats quite the list. However i see that my guest network is still available. But in general..it looks like you really neuter your ability to do much with this in AP mode. I suppose the only thing I could do is make a move to the CBR750. Correct? Not sure if this is worth keeping at this point. Paying a premium for this device and having to run it like this maybe isnt going to work...

You can put the XB7 in modem only mode and run the orbi in router mode. https://www.xfinity.com/support/articles/wireless-gateway-enable-disable-bridge-mode

Webex issues with RBR750 setup | NETGEAR Communities

20 Replies

plemans
Guru
Dec 06, 2020
so the cbr750 system has its own integrated modem. you shouldn't have it connected through a xfinity device.
So do you actually have the cbr system? or whats your model number?
What xfinity modem do you have it connected to? many have their own integrated router as well. That can cause a double nat and issues.
https://kb.netgear.com/30186/What-is-Double-NAT
- kingsxman
  Star
  Dec 06, 2020
  My bad. I was looking at the wrong thing. In logging into the Orbi modem itself its an RBR750.
  
  Your comment on the Orbi replacing the cable modem is interesting. The instructions that came with the Orbi were incredibly basic. It "looked" like, in the instructions, The orbi DID replace the cable modem...however...there is no coaxial connection on the Orbi router. So...thats not going to work. When i asked the Netgear technician on the chat about it she said that it was fine to just plug it into an open ethernet port on the Xfinity router.
  
  My Xfinity router is a Technicolor CGM4331COM
  - plemans
    Guru
    Dec 06, 2020
    so the CGM4331COM has its own integrated router function. Its an XB7 modem/router combo device.
    It can cause a double nat situation.
    
    options to try (only use 1)?
    1. put the CGM4331COM in modem only mode. this disables its router function.
    2. put the Netgear in access point mode. it disables its routing fuction and several other functions, wireless and ethernet still work fine but it leaves the xb7 controlling the actual routing. Tends to be the simplest route. If you do this, disable the wireless on the xb7 to prevent interference.

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Webex issues with RBR750 setup