FWA515 cellular fallback without backup activated.

Sharks

Hello everyone,

I've been living something strange for 2 weeks. My fwa515 connected to FTTH as the main WAN folds into cellular WAN for no apparent reason because the FTTH connection works well.

So I deactivated the WAN backup and the phenomenon is still happening!

You can see it on the attached ping tests that go from 6ms in FTTH to around 35ms in cellular.

My fwa515 returns to the FTTH WAN after 3h30 or if a shutdown and reactivate ETH WAN.

I'm in firmware 1.60. My fwa515 is in router mode, same for the ftth modem (double NAT).

Do you have any idea? A way to have more logs?

Thanks you!

Zyxel_Melen

Hi @Sharks

Thanks for the information! I checked the device's Nebula connection and it certainly using cellular WAN to send traffics. I have started further investigation, and we will update you once we get further info.

Zyxel_Melen

Hi @Sharks

May we access to your organization and check your FWA515's current settings? This allows us to figure how to check this case.

If we may access, please reference this FAQ to enable Zyxel support access, so we can use remote configurator to check your FWA515. Please also share your organization's name so we can find it in our org list.

https://community.zyxel.com/en/discussion/14234/nebula-how-to-turn-on-zyxel-support-access

Sharks

Hi @Zyxel_Melen

Thanks you for the answer. I granted you the access and my organization name is « Franceschelli »

Last occurrence : This night between 2.40am and 7.40am

Thanks you in advanced!

Sharks

Hi @Zyxel_Melen ,

Have you started the investigation?
this phenomenom continues.

blob:https://community.zyxel.com/f3f9c038-ea78-465e-9fde-759769025cc9

Zyxel_Melen

Hi @Sharks

May I know the timestamp of "this phenomenom continues"?

I'm accessing to your FWA515 now, and I see something need to be investigated.

Additionally, may I know if your FTTH is static IP or dynamic IP? If is static IP, may you send me a private message for the static IP information? This can help us to investigate this issue. Thanks!

Sharks

https://community.zyxel.com/en/discussion/comment/85285#Comment_85285

It started around 0.40 am this night.

My public IP address is shared with 3 or 4 other client (CG-Nat) and seems to be renewed after a long period (6 month or if I restart the box) on my FTTH Connection. I will send it to you on a private message.

Thanks!

Zyxel_Melen

Hi @Sharks

Thanks for the information! I checked the device's Nebula connection and it certainly using cellular WAN to send traffics. I have started further investigation, and we will update you once we get further info.

Sharks

Hi @Zyxel_Melen ,

Ok thanks you!
let me know if you need that I do something on my setup!

Thanks you.

Sharks

Hi @Zyxel_Melen ,

Do you have any news?

Thanks you.

PeterUK

would this be the WAN Backup with ping if Primary WAN goes down? whats it set to? maybe try another ping source? what could be happening is your ISP drop ping causing you to go cellular.

I reported a problem with my FWA510 in testing about this option and its said to be fixed

[eITS#250701995]When backup WAN IF in service, user traffic will 

be interruptted periodically due to checking primary WAN status 

operation

I have not tested this as don't really need that option but wanted others who may need this to have trouble free internet.

from what it sounds like the FWA515 may have something similar or if its the same code base still not right?

Zyxel_Melen

Hi @Sharks

We want to focus on the WAN backup is enabling first. Could you help to add some settings?

1. Creating a new APN with the PDP type configured as IPv4 at > Network Setting > Broadband > Cellular APN.
2. Enable WAN Backup

These allows the device to ensure maintaining stable Ethernet check and allows us to narrow down this issue. Thanks!