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.