Do ONTs have a fixed IP?

As in the title.

Do they have a fixed IP from the lan to the router? There was a power cut in the city a couple of days ago and while my broadband came back up more or less right away, some people using Zzoomm seemed to have problems, oine person said it took a few hours for their connection to come back up. I wonder if it is because the ONT and the router came back on at the same time.

The ONT will give the router its IP address by DHCP or some variant thereof from a central server. It has to be flexible to cope with changing to a different ISP or simply dynamic IP from the one ISP. Even a fixed IP will be allocated in this way.

Edited by DFScale (Tue 12-Mar-24 14:30:22)

I thought it would, but just wondered why some with some people it took a while to get working, maybe that is why. I use my own router, not the rubbish thing that Zzoomm provides.

cheers.

Without knowing what the lights on the ONT were doing at the time these connections were down, and being able to see what responses the routers were getting to DHCP requests, it's impossible to do anything other than speculate on the reason. Zzoomm use active cabinets which might have come back on later than the houses that they serve, for example.

Looking at one of the photos, the optical light is on as is the power, but it is the Ethernet light that is not on. I said to turn the router off, leave it off for a bit and then turn it back on. If that don't work then turn them both off and turn on ONT first, wait and then the router.
There is a reset on the ONT, so i suppose they could try that. They have someone from Zzoomm going down to have a look, they said the ONT could have gone belly up.

I did not think ONTs were that fragile, if so, then we would be getting them go pop all the time. I have mine connected to a Surge Protector.

It was my Echo units and hubs that took the longest to come back on. Have not had a power cut for a long time, so no idea what caused this one, but it affected most of the city. It was only quick as I did not even realise we had one, I was outside chatting and only realised something was amiss as all my lights was on when i went back indoors and my Echo unit in the living room was flashing.

i thought Active cabinets would have some sort of battery back up?

ONTs are layer two devices, meaning they just pass ethernet frames through transparently. They have no IP address.

Remote management from the OLT side is done using special management frames over the fibre (again, non-IP). You have no management access to it on the LAN side.

In reply to a post by zyborg47:

There was a power cut in the city a couple of days ago and while my broadband came back up more or less right away, some people using Zzoomm seemed to have problems, oine person said it took a few hours for their connection to come back up.

Then that's a problem with Zzoomm's network. Perhaps those customers were served from a different OLT than you.

I wonder as well if Zzoomm's back end is scaled to support a large number of end points trying to reconnect at the same time. It is possible that their central servers were not up to reconnecting everyone simultaneously. I think it would need more info about where the users were and what infrastructure components they were connected to in order to see if there are patterns.

In reply to a post by candlerb:

ONTs are layer two devices, meaning they just pass ethernet frames through transparently. They have no IP address.

Remote management from the OLT side is done using special management frames over the fibre (again, non-IP). You have no management access to it on the LAN side.

In reply to a post by zyborg47:

There was a power cut in the city a couple of days ago and while my broadband came back up more or less right away, some people using Zzoomm seemed to have problems, oine person said it took a few hours for their connection to come back up.

Then that's a problem with Zzoomm's network. Perhaps those customers were served from a different OLT than you.

cheers for that,

No idea what Ethernet frames are, but I will go on a learning spree later.

Anyway, Zzoomm have installed another ONT and according to the person all is up and running now, so maybe it was a damaged ONT.

Other people have said they lost broadband for a couple of hours, and it then returned.
I was lucky, it returned for me quickly.

yeah. Nokia and Huawei are both at 192.168.100.1

I have a Huawei ONT, and it doesn't respond to that IP.

Text

1 23 45 67 89 1011 1213 14

[admin@gw2] /ip address> add address=192.168.100.254/24 interface=ether1 [admin@gw2] /ip address> /ping 192.168.100.1  SEQ HOST                                     SIZE TTL TIME  STATUS     0 192.168.100.1                                           timeout    1 192.168.100.1                                           timeout     2 192.168.100.1                                           timeout    3 192.168.100.1                                           timeout     4 192.168.100.1                                           timeout    sent=5 received=0 packet-loss=100%  [admin@gw2] /ip address> /ip arp print where address=192.168.100.1 Flags: X - disabled, I - invalid, H - DHCP, D - dynamic, P - published, C - complete #    ADDRESS         MAC-ADDRESS       INTERFACE  0 D  192.168.100.1                     ether1