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authorDaniel Thorpe <1077065+dantho281@users.noreply.github.com>2021-02-11 02:25:57 +0000
committerGitHub <noreply@github.com>2021-02-11 02:25:57 +0000
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-mDNS Repeater
--------------
-
-Starting with VyOS 1.2 a :abbr:`mDNS (Multicast DNS)` repeater functionality is
-provided. Additional information can be obtained from
-https://en.wikipedia.org/wiki/Multicast_DNS.
-
-Multicast DNS uses the 224.0.0.251 address, which is "administratively scoped"
-and does not leave the subnet. It retransmits mDNS packets from one interface
-to other interfaces. This enables support for e.g. Apple Airplay devices across
-multiple VLANs.
-
-Since the mDNS protocol sends the AA records in the packet itself, the repeater
-does not need to forge the source address. Instead, the source address is of
-the interface that repeats the packet.
-
-Configuration
-=============
-
-.. cfgcmd:: set service mdns repeater interface <interface>
-
- To enable mDNS repeater you need to configure at least two interfaces. To
- re-broadcast all incoming mDNS packets from any interface configured here to
- any other interface configured under this section.
-
-.. cfgcmd:: set service mdns repeater disable
-
- mDNS repeater can be temporarily disabled without deleting the service using
-
-.. 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!
-
-Example
-=======
-
-To listen on both `eth0` and `eth1` mDNS packets and also repeat packets
-received on `eth0` to `eth1` (and vice-versa) use the following commands:
-
-.. code-block:: none
-
- set service mdns repeater interface 'eth0'
- set service mdns repeater interface 'eth1'
-
-.. _`Multicast DNS`: https://en.wikipedia.org/wiki/Multicast_DNS