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authorRobert Göhler <github@ghlr.de>2021-01-24 22:14:00 +0100
committerGitHub <noreply@github.com>2021-01-24 22:14:00 +0100
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Migrate new file structure to crux (#435)
* order workflows and add submodule * rename gitmodules file * delete docs/.gitignore * add vyos custom linter * correct __pycache__ in gitignore * add test-coverage.py * move draw.io folder * arrange changelog, install history and about * arrange: firewall * arrange: highavailability * arrange: loadbalancing * arrange: nat * arrange: services * sort configexamples and configuration interfaces * wireles: rename wireless * rearrange: Protocols and Policy * rearrange: Firewall and Zone Policy * rearrange: Interfaces * rearrange: Interfaces * rearrange: dynamic DNS * hostinfo: add page to index * rearrange: appendix * venv: add Pipfile * rearrange: contributing * index: remove debugging * rearrange: fix all figure and refs * rearrange: commandtree * fix: cli, openvpn, install headline level * protocols: change headline * firewall: move mss clamping * ip: separate ipv4 and ipv6 * arp: move to static page * igmp: rename multicast page * Update to year 2021
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+mDNS Repeater
+-------------
+
+Starting with VyOS 1.2 a `Multicast DNS`_ (mDNS) repeater functionality is
+provided.
+
+Multicast DNS uses the 224.0.0.51 address, which is "administratively scoped"
+and does not leave the subnet. It re-broadcast mDNS packets from one interface
+to other interfaces. This enables support for e.g. Apple Airplay devices across
+multiple VLANs.
+
+To enable mDNS repeater you need to configure at least two interfaces. To re-
+broadcast all mDNS packets from `eth0` to `eth1` and vice versa run:
+
+.. code-block:: none
+
+ set service mdns repeater interface eth0
+ set service mdns repeater interface eth1
+
+mDNS repeater can be temporarily disabled without deleting the service using
+
+.. code-block:: none
+
+ set service mdns repeater disable
+
+.. note:: You can not run this in a VRRP setup, if multiple mDNS repeaters
+ are launched in a subnet you will experience the mDNS packet storm death!
+
+
+.. _`Multicast DNS`: https://en.wikipedia.org/wiki/Multicast_DNS