# V3 local\_conf.json "serv\_gw\_key": "what value?" **URL:** \ **Category:** Migrating Gateways to V3\ **Created:** [March 20, 2021, 11:53am UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753 "2021-03-20T11:53:09Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![hphillip](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/hphillip/32/46261_2.png) [@hphillip](https://www.thethingsnetwork.org/forum/u/hphillip)\ **Post date:** [March 20, 2021, 11:53am UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/1 "2021-03-20T11:53:09Z")
Just having a quick experiment with migrating my v2 gateway to v3 (obviously without deleting my v2 definition so I can swiftly swap back) However mp\_pkt\_fwd is hitting an issue with: “ERROR: [TTN] Connection to server “eu1.cloud.thethings.network” failed, retry in 30 seconds” I have managed to convince myself that the issue is the value in local\_conf.json “serv\_gw\_key”: “value” With v2 the **Gateway Key** is generated for me by the console and is of the form ttn-account-v2.blahblahblah But how do I generate an equivalent Gateway Key in v3 to go into my “serv\_gw\_key”: “value” ? I see “Add API key” function in the v3 console but obviously cannot see the wood for the trees 😉 Do I use one of those to generate a Gateway Key ? And if so which? Any comments much appreciated! (If I can just satisfy myself that the migrated gateway can talk to eu1.cloud.thethings.network I will feel much happier about the looming v2 switch off, but I’ll keep the v2 gateway running for as long as possible) Thanks ---
**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\ **Post date:** [March 20, 2021, 12:46pm UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/2 "2021-03-20T12:46:36Z")
You need an API key with > Link as Gateway to a Gateway Server for traffic exchange, i.e. write uplink and read downlink For the host entry you need to append :1881 for the correct port. And with MP forwarder you could consider connecting to both V2 and V3 by adding entries for both. ---
**Author:** ![hphillip](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/hphillip/32/46261_2.png) [@hphillip](https://www.thethingsnetwork.org/forum/u/hphillip)\ **Post date:** [March 20, 2021, 12:48pm UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/3 "2021-03-20T12:48:05Z")
Thanks @kersing I will give that a try. _Update:_ Fantastic - that worked! 13:03:16 INFO: [Transports] Initializing protocol for 2 servers 13:03:16 INFO: [TTN] server “bridge.eu.thethings.network” connected 13:03:16 INFO: [TTN] server “eu1.cloud.thethings.network” connected 13:03:16 INFO: [main] Starting the concentrator 13:03:19 INFO: [main] concentrator started, radio packets can now be received. 13:03:19 INFO: [up] Thread activated for all servers. The subtle bit I was missing was the port 1881 Thank you so much 😃 ---
**Author:** ![joachim1111](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/joachim1111/32/35697_2.png) [@joachim1111](https://www.thethingsnetwork.org/forum/u/joachim1111)\ **Post date:** [August 11, 2021, 9:54am UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/5 "2021-08-11T09:54:17Z")
Hello, i’m tryin to get my gateway on the v3 with no succes. could i get a screenshot of your local\_conf.json file? thanks! ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [August 11, 2021, 10:38am UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/6 "2021-08-11T10:38:29Z")
Please don’t do screen shots for text files. There is a button on the gateway page that will download a conf file for that gateway. ---
**Author:** ![joachim1111](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/joachim1111/32/35697_2.png) [@joachim1111](https://www.thethingsnetwork.org/forum/u/joachim1111)\ **Post date:** [August 11, 2021, 10:46am UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/7 "2021-08-11T10:46:42Z")
This is my local\_conf.json file. is it correct that the serv\_gw\_id is the same as my gateway id? thanks ! ``` { "gateway_conf": { "gateway_ID": "FFFEb827e *****", "description": "joachimindourgateway", "servers": [ { "serv_type": "ttn", "server_address": "eu1.cloud.thethings.network", "serv_gw_id": "FFFEB827E ****", "serv_gw_key": "NNSXS.CQ6YM67E7M5PAYV5YB4LHX3SUS445ZGL3F2EQBY.M3EJ6UNPVUPIJ7ZD6ZSX65BV2PP *****", "serv_enabled": true } ], "gps": false, "fake_gps": true, "ref_latitude": 0, "ref_longitude": 0, "ref_altitude": 0, "gps_tty_path":"/dev/serial1" } } ``` ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [August 11, 2021, 11:32am UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/8 "2021-08-11T11:32:17Z")
The Gateway ID on the console is for your personal identification of your gateway. The Gateway EUI is, confusingly, called the gateway\_ID in the conf file. There is no way that your EUI would start FFFE - anytime we use FFFE, it goes in the middle. And it goes on public record so there is no point \*\*\*\*\* it out. Given the made up EUI, can you tell us what gateway you own - brand and model please. It’s not clear if you tried downloading the configuration file from the console as suggested? I’ve formatted post as per [guidelines](https://www.thethingsnetwork.org/forum/t/how-do-i-format-my-forum-post-howto/8735) - please use \ on the toolbar to format blocks of code, logs or conf files. ---
**Author:** ![hphillip](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/hphillip/32/46261_2.png) [@hphillip](https://www.thethingsnetwork.org/forum/u/hphillip)\ **Post date:** [August 11, 2021, 12:35pm UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/9 "2021-08-11T12:35:08Z")
Hi @joachim1111 I suspect your hardware is different to mine, but for what it’s worth, the main difference I see looking at my own local\_conf.json is… ``` "server_address": "eu1.cloud.thethings.network:1881" ``` It was the lack of port number that caused my own gateway not to connect to v3, a problem solved by @kersing ---
**Author:** ![joachim1111](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/joachim1111/32/35697_2.png) [@joachim1111](https://www.thethingsnetwork.org/forum/u/joachim1111)\ **Post date:** [August 12, 2021, 7:14am UTC](https://www.thethingsnetwork.org/forum/t/v3-local-conf-json-serv-gw-key-what-value/45753/10 "2021-08-12T07:14:23Z")
HI, I found on a other topic a sulotion. i’ve deleted the local\_conf and adepted the global\_conf with the server key. this worked for me. thanks!