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--- ubiquiti:cli:mdns_repeater [2020/12/23 20:42] – peter
+++ ubiquiti:cli:mdns_repeater [2020/12/23 23:16] (current) – peter
@@ Line 1: / Line 1: @@
 ====== Ubiquiti - CLI - mDNS Repeater ======
+**Enable Multicast DNS** in the GUI:
+  * is no substitute for setting the mdns property in the JSON configuration.
+  * supposedly **enables** the mDNS reflector service, and while this seems to work for a while it does not work all the time.
+  * Turning on the mDNS repeater by setting the **mdns** property works.
+----
 To use mDNS repeater on the USG.
@@ Line 7: / Line 15: @@
 ----
-<file json config.gateway.json>
+<file json /srv/unifi/data/sites/default/config.gateway.json>
 {
   "service": {
@@ Line 29: / Line 37: @@
 'mdns repeater interface xxxxx' where xxxxx is/are the interface(s) mDNS advertisements are from as well as repeat mDNS advertisements to.  That means both the source and target interfaces must be added.
+Test your .json code using the [[https://jsonlint.com/|json validator]].
+Once the config.gateway.json file is created or edited:
+  * In the Controller GUI, navigate to **Devices -> Unifi Security Gateway -> Config -> Force Provision -> Provision**.
+Once the USG comes back online you should be all set.
 </WRAP>
@@ Line 59: / Line 78: @@
 SSH tutorial: https://help.ubnt.com/hc/en-us/articles/218850057-Intro-to-Networking-How-to-Establish-a-Connection-Using-SSH
 </WRAP>
+----
+===== Troubleshooting =====
+Alternate between enabling / disabling some of these settings may work.
+Enable IGMP Snooping as it can help with multicast traffic:
+  * Navigate to **Settings - Networks** and select a network.
+  * Enable IGMP snooping.
+Enable Multicast Enhancement:
+  * Navigate to **Settings -> Wireless Networks** and select a network.
+  * Enable **Multicast Enhancement (IGMPv3)**.
+Enable MulticastDNS Service:
+  * Navigate to **Settings -> Services -> MDNS**.
+  * Enable **Multicast DNS**.
+<WRAP info>
+**NOTE:**  Enabling the mDNS feature will enable a service on the USG that will reflect (mirror) mDNS packets into all other networks including WAN.
+</WRAP>
+Ensure Firewall is not blocking:
+  * Port 5353 is used for Bonjour services/discovery.
+----
+===== References =====
+https://help.ui.com/hc/en-us/articles/215458888-UniFi-USG-Advanced-Configuration-Using-config-gateway-json
+[[https://jsonlint.com/|json validator]]
+https://help.ubnt.com/hc/en-us/articles/218850057-Intro-to-Networking-How-to-Establish-a-Connection-Using-SSH
+https://help.ui.com/hc/en-us/articles/360001004034-UniFi-Best-Practices-for-Managing-Chromecast-Google-Home-on-UniFi-Network
+https://en.m.wikipedia.org/wiki/IGMP_snooping