Chapter 9 Interfaces
ZyWALL ATP Series User’s Guide
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Set the priority used to identify the DR or BDR if one does not exist.
9.3.1.1 IGMP Proxy
Internet Group Management Protocol (IGMP) proxy is used for multicast routing. IGMP proxy enables the
Zyxel Device to issue IGMP host messages on behalf of hosts that the Zyxel Device discovered on its
IGMP-enabled interfaces. The Zyxel Device acts as a proxy for its hosts. Refer to the following figure.
• DS: Downstream traffic
• US: Upstream traffic
•R: Router
• MS: Multicast Server
• Enable IGMP Upstream (US) on the Zyxel Device interface that connects to a router (R) running IGMP
that is closer to the multicast server (MS).
• Enable IGMP Downstream on the Zyxel Device interface which connects to the multicast hosts.
Figure 167 IGMP Proxy
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