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74 lines
2.5 KiB
ReStructuredText
74 lines
2.5 KiB
ReStructuredText
.. _igmp_proxy:
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##########
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IGMP Proxy
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##########
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:abbr:`IGMP (Internet Group Management Protocol)` proxy sends IGMP host messages
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on behalf of a connected client. The configuration must define one, and only one
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upstream interface, and one or more downstream interfaces.
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Configuration
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=============
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.. cfgcmd:: set protocols igmp-proxy interface <interface> role <upstream | downstream>
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* **upstream:** The upstream network interface is the outgoing interface
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which is responsible for communicating to available multicast data sources.
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There can only be one upstream interface.
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* **downstream:** Downstream network interfaces are the distribution
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interfaces to the destination networks, where multicast clients can join
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groups and receive multicast data. One or more downstream interfaces must
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be configured.
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.. cfgcmd:: set protocols igmp-proxy interface <interface> alt-subnet <network>
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Defines alternate sources for multicasting and IGMP data. The network address
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must be on the following format 'a.b.c.d/n'. By default the router will
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accept data from sources on the same network as configured on an interface.
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If the multicast source lies on a remote network, one must define from where
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traffic should be accepted.
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This is especially useful for the upstream interface, since the source for
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multicast traffic is often from a remote location.
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This option can be supplied multiple times.
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.. cfgcmd:: set protocols igmp-proxy disable-quickleave
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Disables quickleave mode. In this mode the daemon will not send a Leave IGMP
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message upstream as soon as it receives a Leave message for any downstream
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interface. The daemon will not ask for Membership reports on the downstream
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interfaces, and if a report is received the group is not joined again
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upstream.
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If it's vital that the daemon should act exactly as a real multicast client
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on the upstream interface, this function should be enabled.
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Enabling this function increases the risk of bandwidth saturation.
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.. cfgcmd:: set protocols igmp-proxy disable
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Disable this service.
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Example
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-------
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Interface `eth1` LAN is behind NAT. In order to subscribe `10.0.0.0/23` subnet
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multicast which is in `eth0` WAN we need to configure igmp-proxy.
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.. code-block:: none
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set protocols igmp-proxy interface eth0 role upstream
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set protocols igmp-proxy interface eth0 alt-subnet 10.0.0.0/23
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set protocols igmp-proxy interface eth1 role downstream
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Operation
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=========
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.. opcmd:: restart igmp-proxy
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Restart the IGMP proxy process.
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