# I am unable to set up the ACS, OLT, and CPE in a closed (isolated) network environment

**URL:** <https://forum.genieacs.com/t/i-am-unable-to-set-up-the-acs-olt-and-cpe-in-a-closed-isolated-network-environment/7026>\
**Category:** Uncategorized\
**Created:** [July 19, 2025, 1:47am UTC](https://forum.genieacs.com/t/i-am-unable-to-set-up-the-acs-olt-and-cpe-in-a-closed-isolated-network-environment/7026 "2025-07-19T01:47:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![pphh](https://avatars.discourse-cdn.com/v4/letter/p/ee59a6/32.png) [@pphh](https://forum.genieacs.com/u/pphh)\
**Post date:** [July 19, 2025, 1:47am UTC](https://forum.genieacs.com/t/i-am-unable-to-set-up-the-acs-olt-and-cpe-in-a-closed-isolated-network-environment/7026/1 "2025-07-19T01:47:32Z")

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Hello,

I referred to the official GenieACS documentation and deployed GenieACS on a laptop running Ubuntu 22.04.

I purchased a V1600GS OLT along with three ONUs — HG8120C, EG8145X6, and G-1426-MA — and attempted a closed-network TR-069 simulation using the following setup:

[GenieACS - RJ45(GE1) - OLT - Optical Patch Cord(PON) - ONU]

So far, none of the CPEs have successfully connected to the ACS.

Below is the configuration screen of the V1600GS OLT and G-1426-MA

 ![15](https://canada1.discourse-cdn.com/flex035/uploads/genieacs/original/2X/a/a422594eb8a9ebee71f35b4ed0fbf938044d1884.jpeg)

I can confirm that the CPEs are registered to the OLT via the PON port, but when I run `tcpdump` on the ACS laptop, I see no traffic at all.

Please help me.

Thank you.