Example 4.14. IGMP - No Address Translation
The following example requires a configured interface group IfGrpClients including interfaces if1, if2 and if3. The
ip address of the upstream IGMP router is known as UpstreamRouterIP.
Two rules are needed. The first one is a report rule that allows the clients behind interfaces if1, if2 and if3 to
subscribe for the multicast groups 239.192.10.0/24. The second rule, is a query rule that allows the upstream
router to query us for the multicast groups that the clients have requested.
The following steps need to be executed to create the two rules.
Web Interface
A. Create the first IGMP Rule:
1. Go to Routing > IGMP > IGMP Rules > Add > IGMP Rule
2. Under General enter:
• Name: A suitable name for the rule, for example Reports
• Type: Report
• Action: Proxy
• Output: wan (this is the relay interface)
3. Under Address Filter enter:
• Source Interface: lfGrpClients
• Source Network: if1net, if2net, if3net
• Destination Interface: core
• Destination Network: auto
• Multicast Source: 192.168.10.1
• Multicast Destination: 239.192.10.0/24
4. Click OK
B. Create the second IGMP Rule:
1. Again go to Routing > IGMP > IGMP Rules > Add > IGMP Rule
2. Under General enter:
• Name: A suitable name for the rule, for example Queries
• Type: Query
• Action: Proxy
• Output: IfGrpClients (this is the relay interface)
3. Under Address Filter enter:
• Source Interface: wan
• Source Network: UpstreamRouterIp
• Destination Interface: core
• Destination Network: auto
• Multicast Source: 192.168.10.1
• Multicast Group: 239.192.10.0/24
4. Click OK
4.6.3. IGMP Configuration Chapter 4. Routing
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