AON fiber stopped working after switching to SFP module

If you start making changes to the fiber connection,  you could break something. No RX could mean that the optics in the FTU box are damaged, maybe you used a wrong connector type?

When the FTU needs to be repaired, the grid provider will send you an invoice for that. So, be really precise in what you do there or hire a local IT technician.

Hi ​@eric. Thanks for the reply. I’m very confident the connector type in the box is correct. I also changed the patch cables very carefully, so I think it’s unlikely something broke. I’ll call customer service and ask them if a MAC release is possible.

Now the original media converter works again. Is there any extra step needed when using my own SFP module?

​@rvk01 Thanks for the reply. I asked (with pictures of my converter) in another thread and I got a confirmation that I have AON. Was it supposed to work straight away then?

For AON you shouldn’t need to clone the serial number. So it should work if you just set VLAN to 300.

I’m not sure if mentioned SFP module is the correct one. Maybe someone else knows.

​@rvk01 the media converter says inside: “Dual Rate, Single mode 10km, TX/RX: 1310/1550”. This matches the spec of the FS module I bought. I also saw someone else recommending it here.

The weird thing to me is that the SFP+ port does become green in the router UI, so I believe the module, cables and connection are fine. The port settings too: VLAN set to 300, port set to 1Gbps FDX. Still, I don’t get internet connection.

A mechanic came by today to check and he couldn’t get it working either, not even with the original media converter. But some time after he left, things started to work again with the original converter. He did call Odido, so I’m wondering if they made a remote reset. At least the original media converter works again. Not my FS module though (I tried again and reverted to the original media converter quickly this time to avoid having no internet at all again).

The weird thing is that ethtool shows that there is a connection from the other side, only for some reason I'm not getting internet connection.
 

root@UCG-Fiber:~# ethtool eth6
Settings for eth6:
Supported ports: [ FIBRE ]
Supported link modes:   100baseT/Full
                        1000baseT/Full
                        10000baseT/Full
                        2500baseT/Full
                        5000baseT/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes:  1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Port: MII
PHYAD: 30
Transceiver: external
Auto-negotiation: off
Link detected: yes

Do you get an (external) IP and/or DNS servers via dhcp for the UCG?

Hmm i think the problem is mac related. try waiting 1h or call customer support and request a “mac release” the shuld have a button for that on a AON connection. there use to be a limit of 2 concurrent mac adresses for modem swap. only the Technicians can do it from there service page. so mabe the changed that ? anyway am i correct that you move from a rj45 port to a fiber port on the same device ? that might be the reason for the conflict in this case.

​@Hidden.nld I just spoke with Odido customer service. They asked me to connect my original modem again so they could do operations remotely, but the option to release the MAC address wasn't available (I understood it's not available for AON connection. He also mentioned my connection is p2p).

If I run tcpdump on my router to capture traffic for that STF+ port on VLAN 300 (eth6.300) I see my device requests an IP address do the DHCP server but gets no response.

I even tried changing the MAC address for the STF+ port to the one they informed me in the customer service (from my original modem registered in the network). I see when requesting the DHCP the MAC they provided. But no luck with cloning the MAC address either.

15:14:15.693114 IP6 fe80::XXXX:XXXX:XXXX:XXXX > ff02::16: HBH ICMP6, multicast listener report v2, 3 group record(s), length 68
15:14:15.783115 IP6 fe80::XXXX:XXXX:XXXX:XXXX > ff02::16: HBH ICMP6, multicast listener report v2, 3 group record(s), length 68
15:14:16.063190 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from MAC: XX:XX:XX:XX:XX:XX (oui Unknown), length 302
15:14:19.143104 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from MAC: XX:XX:XX:XX:XX:XX (oui Unknown), length 302
15:14:22.243159 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from MAC: XX:XX:XX:XX:XX:XX (oui Unknown), length 302
15:14:45.373775 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from MAC: XX:XX:XX:XX:XX:XX (oui Unknown), length 302
15:14:48.433105 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from MAC: XX:XX:XX:XX:XX:XX (oui Unknown), length 302
15:14:51.593121 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from MAC: XX:XX:XX:XX:XX:XX (oui Unknown), length 302
15:15:14.853126 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from MAC: XX:XX:XX:XX:XX:XX (oui Unknown), length 302
15:15:17.983128 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from MAC: XX:XX:XX:XX:XX:XX (oui Unknown), length 302

They couldn't help me more and pointed me to ask for more help in the community, so here is my last hope...

​@Waqqas sorry for the ping, but you helped me to identify my connection was AON before. Maybe you have an idea on how to solve this problem? Thanks!

Hi ​@andre3d 

I’d like to take a look at the problem together with you.

For that, I just need a bit more information from you. Could you please complete your profile with your postal code, house number, date of birth, and the last 4 digits of your bank account number? You can do this by clicking your avatar in the top right → My Profile → Edit Profile.

As well please connect the SFP to your UCG-Fiber so I can have a look when it does not work. 

​@Sven-Odido thanks a lot! Information added on my profile! Feel free to text me in private if more information is needed.

​@Sven-Odido I couldn’t reply to you on private since you don’t follow me, but I did what you asked, I plugged my SFP to my UCG-Fiber and to my surprise, this time it worked! Super happy with that.

I did nothing different than in my previous attempts. Just out of curiosity, did you take any action from your side? Or maybe because I waited 1 month since my last attempted something was cleared up? Thanks.

Whoeps Sorry I forgot I have that setting on hahah 

Cool! I didn't do anything yet. Nothing needs to be cleared up as long as you don't use more then two different modems within an hour. Then still the oldest will clear up after an hour. 

So your just started working after plugging it in one time?