{"id":18976,"date":"2024-03-14T16:38:01","date_gmt":"2024-03-14T16:38:01","guid":{"rendered":"https:\/\/made4it.com.br\/blog\/reconfiguring-onu-ont-nokia-g-1425-ga-after-reset-auto-configuration-using-dhcp-option-43-for-acs-delivery\/"},"modified":"2026-07-01T14:41:16","modified_gmt":"2026-07-01T14:41:16","slug":"reconfiguring-onu-ont-nokia-g-1425-ga-after-reset-auto-configuration-using-dhcp-option-43-for-acs-delivery","status":"publish","type":"post","link":"https:\/\/made4it.com.br\/en\/blog\/reconfiguring-onu-ont-nokia-g-1425-ga-after-reset-auto-configuration-using-dhcp-option-43-for-acs-delivery\/","title":{"rendered":"Reconfiguring ONU\/ONT NOKIA G-1425-GA after reset: auto-configuration using DHCP Option 43 for ACS delivery"},"content":{"rendered":"\n

In this article we will talk about the process of reconfiguring Nokia G-1425-GA<\/strong> routers after they have been reset. In order for them to be completely reconfigured to the state they were in before the reset, an ACS TR-069 server must be up and running, persisting its previous settings. <\/p>\n\n

If you don’t know what an ACS server is or how useful it is, read this article<\/a>.<\/p>\n\n

These tests were carried out in the laboratory environment of DPR Telecomunica\u00e7\u00f5es, NOKIA’s largest partner in Brazil. They have a large optical equipment factory and a laboratory for testing Nokia solutions. Find out more about DPR here<\/a>. <\/p>\n\n

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For the test, we used the NOKIA G-1425-GA UN<\/strong> model. It was fully configured, including the Made4it made4graph ACS server, which handled data persistence for provisioning. <\/p>\n\n

Once the laboratory environment has been properly provisioned, we apply a factory-reset to our test CPE. As we can see in the images below, all the settings have been lost, including WAN, Wifi and the ACS server returning to default. <\/p>\n\n

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Requesting “Reset System Configuration to Factory Default<\/strong>“<\/p>\n\n

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The “default<\/strong>” TR-069 settings of the Nokia ONT after the reset. <\/p>\n\n

An important part of the lab is to observe the VLAN and the ONU’s addressing mode with factory settings. In this case, the Nokia ONU connects to a WAN on VLAN 881 with DHCP enabled. <\/p>\n\n

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With the router reset to its factory settings, we set up the self-provisioning infrastructure via DHCP Option 43, as described in the article<\/a>: . We used the same default VLAN 881 for this! <\/p>\n\n

Here, in a few moments, the ONU received the IP address from the DHCP server and also the ACS server. <\/p>\n\n

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After that, the magic of the TR-069 begins, with the ACS server made4graph<\/a> <\/strong>completely reconfiguring the ONU to its previous state, including the correct WAN settings (username, PPPoE password, and VLAN for accessing the BNG\/BRAS), Wi-Fi, port forwarding, and much more. <\/p>\n\n

And how do you generate the URL for ACS delivery via DHCP Option 43?<\/h3>\n\n

To generate the URL, Nokia uses a rule for option 43“Vendor Specific Information<\/strong>” coded with 3 parameters: <\/p>\n\n