IMPORTANT issue with HUB4000 and firmware 1.16 if optic fiber drops

[goldriver]

@BellPatricia @BellNick 

I have been installed firmware 1.16 a few days ago and while doing failover test on my network, I discovered an important problem that might be a big issue.

First, let me describe my setup, I have a UNIFI UDM-Pro router configured to provide DHCP over 192.168.1 network to my house devices. this router is connected to my HUB4000 via the 10GB port.

While doing failover testing, I disconnected the optic fiber between the HUB4000 and Bell connector.  The result was as I expeted it to be on my Unifi UDP router so I reconnected the optic fiber between the HUB4000 and the Bell connection box

After doing so, TV stopped working and refused to connect asking to restart the android device wich I did and that did not solve the problem . Continuing my investigation, I connected my iphone via WIFI to the HUB4000 instead of my own UNIFI network and found out that the HUB4000 was now providing 192.168.1.X ranges address to devices instead of 192.168.2.X. (192.168.1.X in my network range ip adresses)

To fix the issue I had to disconnect my 10GB line from my Unifi UDM-PRO of the HUB4000, unplug power from the HUB4000, plugged back HUB4000 wait until HUB4000 completely reboots. I the reconnected my iphione to the Bell wifi to make sure DHCP was providing a 192.168.2.X adress, once I confirmed, only then I reconnect my 10GB line between my router and HUB4000 and everything was back to normal.

I have tried this a second time to confirm the behavior and it is constant.

HUB4000 NEVER SHOULD REACT TAKING a LAN DHCP adress, it should always stick with its configured network which is 192.168.2.x

[goldriver]

1- @ZaneP I have been told to continue through the Bell community forum with @BellPatricia 

2- Very good point, I did the same tests with the Telus modem disconnected so no failover ad only Hub4000 connected to the UDM and the problem does not occur. At this point I am completely in the dark as to why the HUB4000 while DHCP is on would change it's static IP to 192.168.1.1 when Failover is connected to the UDMPRO and won't when failover is disconnected ...

Any how, there is still no reason as to why a gateway acting as a router would change it's adress !

@BellPatricia I think it is time that someone from the DSLR team contacts me directly so we can go further on testing and trying to figure out this issue

[ZaneP]

"...why the HUB4000 while DHCP is on would change it's static IP to 192.168.1.1......."

What is the benefit of enabling the Bell modem's DHCP server? Isn't the UDMPRO the appropriate DHCP server? During a failover event, why would Bell's modem serving IP addresses to the LAN be important? I must be missing something.

When the problem occurs and you log into the Bell modem's dashboard: /Advanced Tools and Settings/DHCP, what do you see as the "Router IP address"?

It's possible that there's nothing about the firmware of the Bell modem that's causing your problem. Perhaps there's a misconfiguration in your network topology (there's a  lot of "moving parts").

You may also want to post in forums that focus on the UDM Pro, including its own forum: https://community.ui.com/

I hope you make some progress on this issue.

[BellPatricia]

Good morning @goldriver, thanks for all of the additional information. Appreciate your suggestions and feedback as well @ZaneP.

@goldriver When the issue happens we recommend that you use your iPhone which has the 192.168.1.60 IP, and access 192.168.1.1. Then can you please share which page loads up; UDM admin page, Telus modem admin, or the Bell Home Hub admin page?

- Patricia

[goldriver]

The only reason I would have liked to keep the DHCP on was to have a guest network on a different network just so I could because I was running 2 routers.

When the problem occurs, the Bell modem's IP in the interface settings --> DHCP changed to 192.168.1.1... this is what I find completely strange.

Anyhow, I disabled the DHCP from the HUB4000, this will fix the issue..,.

I would have even prefer to get rid of the Bell modem's and connect the fiber directly in my UDP but unfortunatly, from what I have been told, this is impossible if I still want the Android Fiber tv box as it would be specifically driven by the Bell TV Network on the HUB4000

[goldriver]

I will conduct more test tomorrow morning, during the day the network is being used for "work" ...

[ZaneP]

It's good to hear that you do have a solution for the issue.

As you know the ONT isn't removable on these new modems...it's soldered onto the board.  Maybe someone on the DSLR Bell forum can advise you on a workaround for the tv issue.

Could you get the UAP AC Mesh Pro and configure it for your wifi's network devices and guests?

[goldriver]

@BellPatricia I conducted the test and it is the UDM admin page that came up.

Here are the steps I did:

1- Disconnected the Optic Fiber from the HUB4000
2- On my Iphone selected the "BELL667" SSID (wich is the HUB4000 wifi network) enterer the BELL667 password (wich is different than any other SSID on the environnent) 
3- Once connection done, I went on the phone and press setting --> wifi and press the "i" to look at the idadress provided by the DHCP (this was 192.168.1.160 and the router was 192.168.1.1) 
4- I then open chrome and typed in 192.168.1.1 that lead me to the UDM controler
5- Once in the UDM, I went in the "Device list" and there was no 192.168.1.160 device attributed to any devices
From what I know of network, if an SSID is only configured on 1 router, there is no way when connecting via a phone wifi to this specific SSID and it specific passwork to be connected to another router !
agree ?
If so this definitly confirms that the ip adress received at the phone level was delivered by the HUB4000

The final test was :
6- Then Disconnected both optic anfd 10gig to the UDM, "forgot"  BELL667 on Iphone, reconnected to Bell667 on iphone and now I got the 192.168.2.47 adress 

[goldriver]

I'll post on the DSLR to see if there would be a solution to take off the HUB4000 from the picture and have tv working anyway.

I already have a UAP Mesh grid of 4, yes I can definitly configure it and add a guest network. As mentionned before I was trying to get the most of the environment and take any guest traffic out of the Unifi working environment so there would be less "noise" on the unifi network. (I would have send kids games, streaming and everything of the "work" network).

[ZaneP]

"I was trying to get the most of the environment and take any guest traffic out of the Unifi working environment..."

I imagine your Unifi software and hardware is quite robust, given that it's enterprise-level! 😀

Anyway, I hope you get a solution to the IPTV issue from the on DSLR Bell forum.

[BellPatricia · Accepted solution]

Good afternoon @goldriver, thanks very much for the additional testing you've done.

We do not think that the Home Hub is providing the 192.168.1.160 IP address.

Another option you could try to reproduce this is to connect a PC (instead of your iPhone) loaded with Wireshark packet capture running, and observe which device based on the MAC address is offering that IP address.

The UDM device should be configured to not offer a DHCP address on a port that should be operating in WAN mode.

- Patricia