Configure IGMP Multicast Group Filter

Network Requirement

• The whole network runs the PIM-SM protocol.
• Receiver is one receiver of the Device end network.
• Run IGMPv2 between Device and the end network.
• Device interface vlan3 filters the multicast group; the range of the multicast groups Receiver is permitted to add is 225.1.1.0-225.1.1.255.

Network Topology

Figure 5-4 Networking of configuring IGMP multicast group filter

Configuration Steps

Step 1: Configure the IP address of the interface. (omitted)

Step 2: Globally enable the multicast forwarding and enable the multicast protocol PIM-SM on the interface.

#Configure Device.

Globally enable the multicast forwarding and enable the multicast protocol PIM-SM on the related interfaces.

#View the IGMP information of Device interface vlan3.

Device#show ip igmp interface vlan3
Interface vlan3 (Index 50331921) 
 IGMP Enabled, Active, Querier (3.0.0.1)  
 Default version 2  
 IP router alert option in IGMP V2 msgs: EXCLUDE 
 Internet address is 3.0.0.1 
 IGMP query interval is 125 seconds 
 IGMP querier timeout is 255 seconds 
 IGMP max query response time is 10 seconds 
 Last member query response interval is 1 seconds 
 Last member query count is 2  
 Group Membership interval is 260 seconds 
 IGMP robustness variable is 2

Step 3: Configure the multicast group filter on Device interface vlan3.

#Configure Device.

Configure the multicast group filter on Device interface vlan3; the range of the multicast groups Receiver is permitted to add is 225.1.1.0-225.1.1.255.

Step4: Check the result.

#Receiver sends the IGMPv2 member relation report to add to multicast group 225.1.1.1 and 226.1.1.1.

#Source sends the multicast packets with multicast group 225.1.1.1 and 226.1.1.1.

#View the multicast member table of Device.

Device#show ip igmp groups  
IGMP Connected Group Membership
Total 1 groups 
Group Address  Interface    Uptime     Expires   Last Reporter V1 Expires V2 Expires
-------------------------------------------------------------------------------- 
225.1.1.1      vlan3        03:14:59   00:03:05	 3.0.0.2       stopped

#View the multicast route table of Device.

Device#show ip pim mroute
IP Multicast Routing Table:
PIM VRF Name: Default
Total 0 (*,*,RP) entry
Total 1 (*,G) entry 
Total 2 (S,G) entries
Total 2 (S,G,rpt) entries
Total 0 FCR entry 
Up timer/Expiry timer 
 
(*, 225.1.1.1) 
Up time: 00:00:56 RP: 0.0.0.0 
RPF nbr: 0.0.0.0 RPF idx: None
Flags: 
  JOIN DESIRED 
Upstream State: JOINED 
  Local interface list: 
    vlan3 
  Joined interface list: 
  Asserted interface list: 
 
(192.168.1.1, 225.1.1.1) 
Up time: 00:00:15
KAT time: 00:03:15
RPF nbr: 0.0.0.0
RPF idx: None 
SPT bit: TRUE Flags: 
  JOIN DESIRED 
  COULD REGISTER 
Upstream State: JOINED 
  Local interface list: 
  Joined interface list: 
    register_vif0 
  Asserted interface list: 
  Outgoing interface list: 
    register_vif0 
    vlan3 
  Packet count 1 
 
(192.168.1.1, 225.1.1.1, rpt) 
Up time: 00:00:15 RP: 0.0.0.0 
Flags: 
  RPT JOIN DESIRED 
  RPF SGRPT XG EQUAL 
Upstream State: NOT PRUNED 
  Local interface list: 
  Pruned interface list: 
  Outgoing interface list: 
    vlan3 
 
(192.168.1.1, 226.1.1.1) 
Up time: 00:00:15
KAT time: 00:03:15
RPF nbr: 0.0.0.0
RPF idx: None 
SPT bit: TRUE
Flags: 
  JOIN DESIRED 
  COULD REGISTER 
Upstream State: JOINED 
  Local interface list: 
  Joined interface list: 
    register_vif0 
  Asserted interface list: 
  Outgoing interface list: 
    register_vif0 
  Packet count 1 
              
(192.168.1.1, 226.1.1.1, rpt) 
Up time: 00:00:15 RP: 0.0.0.0 
Flags: 
  RPF SGRPT XG EQUAL 
Upstream State: RPT NOT JOINED 
  Local interface list: 
  Pruned interface list: 
  Outgoing interface list:

#Receiver can only receive the multicast service packets with multicast group 225.1.1.1 sent by Source.

• ---

  To filter based on multicast source group, use the command ip igmp ssm-access-group to realize. When using the command, it is required that the device runs PIM-SSM and the interface runs IGMPv3.

  ---