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## Configure the IGMP Proxy

This section shows how to set up an IGMP topology.

1. On the router, create `VLAN 2` and `VLAN 3`, and associate the ports to the corresponding VLAN.

       SEFOS# configure terminal
       SEFOS(config)# vlan 2
       SEFOS(config-vlan)# ports extreme-ethernet 0/1 untagged extreme-ethernet 0/1
       SEFOS(config-vlan)# exit
       SEFOS(config)# interface extreme-ethernet 0/1
       SEFOS(config-if)# switchport access vlan 2
       SEFOS(config-if)# exit
       SEFOS(config)# interface vlan 2
       SEFOS(config-if)# shutdown
       SEFOS(config-if)# ip address 12.0.0.1 255.0.0.0
       SEFOS(config-if)# no shutdown
       SEFOS(config-if)# exit
       SEFOS(config)# vlan 3
       SEFOS(config-vlan)# ports extreme-ethernet 0/2 untagged extreme-ethernet 0/2
       SEFOS(config-vlan)# exit
       SEFOS(config)# interface extreme-ethernet 0/2
       SEFOS(config-if)# switchport access vlan 3
       SEFOS(config-if)# no shutdown
       SEFOS(config-if)# exit
       SEFOS(config)# interface vlan 3
       SEFOS(config-if)# shutdown
       SEFOS(config-if)# ip address 20.0.0.1 255.0.0.0
       SEFOS(config-if)# no shutdown
       SEFOS(config-if)# end

2. Verify the changes to the VLAN configuration.

       SEFOS# show ip interface

       vlan1 is up, line protocol is down
       Internet Address is 10.0.0.1/8
       Broadcast Address  10.255.255.255

       vlan2 is up, line protocol is up
       Internet Address is 12.0.0.1/8
       Broadcast Address  12.255.255.255

       vlan3 is up, line protocol is up
       Internet Address is 20.0.0.1/8
       Broadcast Address  20.255.255.255

3. Review the VLAN database information.

       SEFOS# show vlan brief

       Vlan database
       -------------
       Vlan ID             : 2
       Member Ports        : Ex0/1
       Untagged Ports      : Ex0/1
       Forbidden Ports     : None
       Name                :
       Status              : Permanent
       ----------------------------------------------------
       Vlan ID             : 3
       Member Ports        : Ex0/2
       Untagged Ports      : Ex0/2
       Forbidden Ports     : None
       Name                :
       Status              : Permanent
       ----------------------------------------------------
       Vlan ID             : 1
       Member Ports        : Ex0/3, Ex0/4, Ex0/5, Ex0/6, Ex0/7, Ex0/8
                             Ex0/9, Ex0/10, Ex0/11, Ex0/12, Ex0/13, Ex0/14
                             Ex0/15, Ex0/16, Ex0/17, Ex0/18, Ex0/19, Ex0/20
                             Ex0/21, Ex0/22, Ex0/23, Ex0/24
       Untagged Ports      : Ex0/3, Ex0/4, Ex0/5, Ex0/6, Ex0/7, Ex0/8
                             Ex0/9, Ex0/10, Ex0/11, Ex0/12, Ex0/13, Ex0/14
                             Ex0/15, Ex0/16, Ex0/17, Ex0/18, Ex0/19, Ex0/20
                             Ex0/21, Ex0/22, Ex0/23, Ex0/24
       Forbidden Ports     : None
       Name                :
       Status              : Permanent
       ----------------------------------------------------

4. Enable IGMP and the IGMP proxy service globally on the VLANs.

       SEFOS# configure terminal
       SEFOS(config)# set ip igmp enable
       SEFOS(config)# ip igmp proxy-service
       SEFOS(config)# interface vlan 2
       SEFOS(config-if)# set ip igmp enable
       SEFOS(config-if)# exit
       SEFOS(config)# interface vlan 3
       SEFOS(config-if)# set ip igmp enable
       SEFOS(config-if)# end

5. Configure `VLAN 2` as an upstream interface to receive the incoming data packets.

       SEFOS# configure terminal
       SEFOS(config)# interface vlan 2
       SEFOS(config-if)# ip igmp-proxy mrouter
       SEFOS(config-if)# end

6. For `VLAN 3` (`224.1.1.1`), add a static-multicast group membership.

       SEFOS# configure terminal
       SEFOS(config)# interface vlan 3
       SEFOS(config-if)# ip igmp static-group 224.1.1.1
       SEFOS(config-if)# end

   Note - Adding a static group membership is not required if the device connected to the `VLAN 3` interface is capable of sending an IGMP membership report to the switch.

7. Verify the changes to the IGMP configuration.

       SEFOS# show ip igmp global-config

        IGMP is globally enabled
        IGMP Proxy is globally enabled in the system

8. Review the configuration information.

       SEFOS# show ip igmp interface

        vlan2, line protocol is up
        Internet Address is 12.0.0.1/8
        IGMP is enabled on interface
        Interface is configured as Upstream interface

       vlan3, line protocol is up
        Internet Address is 20.0.0.1/8
        IGMP is enabled on interface
        Current IGMP router version is 2
        IGMP query interval is 125 seconds
        Last member query response interval is 10 seconds
       IGMP max query response time is 100 seconds
       Robustness value is 2
        IGMP querying router is 20.0.0.1 (this system)
        Fast leave is disabled on this interface
        Number of multicast groups joined 1

9. Review the IGMP group information.

       SEFOS# show ip igmp groups

       I - Include Mode,  E - Exclude Mode
       S - Static Mbr,    D - Dynamic Mbr

       GroupAddress  Flg  Iface  UpTime        ExpiryTime    LastReporter
       -----------  ----  ---   -------        ----------     -----------
       224.1.1.1     S   vlan3 [0d 00:03:02.86] [0d 00:00:00.00]  0.0.0.0

10. Verify that the multicast data from `VLAN 2` is forwarded to `VLAN 3`.

    At the packet generator, create and transmit a valid multicast data packet with destination IP address `224.1.1.1` and source IP address `12.0.0.`x. Ensure that the packet is received by the packet capturing device.

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