# Map two different interfaces to FreeRTOS+TCP stack **URL:** \ **Category:** Libraries\ **Created:** [December 8, 2021, 9:32am UTC](https://forums.freertos.org/t/map-two-different-interfaces-to-freertos-tcp-stack/14033 "2021-12-08T09:32:13Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![AzerAhai](https://avatars.discourse-cdn.com/v4/letter/a/a9adbd/32.png) [@AzerAhai](https://forums.freertos.org/u/AzerAhai)\ **Post date:** [December 8, 2021, 9:32am UTC](https://forums.freertos.org/t/map-two-different-interfaces-to-freertos-tcp-stack/14033/1 "2021-12-08T09:32:13Z")
Hello, I am working with a STM32F4 board and I would like to use FreeRTOS+TCP stack with both ETH\_MAC and USB\_OTG\_FS. From what I have seen on the web, there is no official demo of FreeRTOS+TCP with USB, but is it possible to use the stack with these two interfaces ? Thank you, Azer ---
**Author:** ![rtel](https://d3iykfbgfh8zhg.cloudfront.net/user_avatar/forums.freertos.org/rtel/32/31_2.png) [@rtel](https://forums.freertos.org/u/rtel)\ **Post date:** [December 8, 2021, 5:02pm UTC](https://forums.freertos.org/t/map-two-different-interfaces-to-freertos-tcp-stack/14033/2 "2021-12-08T17:02:27Z")
You want to use the USB OTG peripheral as an Ethernet port? If you have a driver for that then the [multi-interface version of FreeRTOS+TCP](https://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/freertostcp-multiple-interfaces.html) (not fully released yet) may help. ---
**Author:** ![htibosch](https://d3iykfbgfh8zhg.cloudfront.net/user_avatar/forums.freertos.org/htibosch/32/62_2.png) [@htibosch](https://forums.freertos.org/u/htibosch)\ **Post date:** [December 9, 2021, 2:21am UTC](https://forums.freertos.org/t/map-two-different-interfaces-to-freertos-tcp-stack/14033/3 "2021-12-09T02:21:43Z")
You can also find the URL of the IPv6/multi Github branch on the page mentioned by @rtel. Unfortunately I don’t have experience with using USB as an Ethernet port, at least not on STM32. If you have any questions you can ask them here.