Example for Configuring IGMP Snooping Proxy in a VLAN

Networking Requirements

As shown in Figure 1, the router runs IGMPv3 and connects to user hosts through a Layer 2 switch. There are multiple receiver hosts on the network. The administrator wants to mitigate the IGMP message processing load of the router.

Figure 1 Network diagram for IGMP snooping proxy configuration

Configuration Roadmap

To meet the preceding requirements, configure IGMP snooping proxy on the switch. The configuration roadmap is as follows:

Create a VLAN and add interfaces to the VLAN.
Enable IGMP snooping globally and in the VLAN.
Configure IGMP snooping proxy on the switch to reduce packet exchange between the switch and router.
Disable the switch from sending IGMP Query messages to the upstream router to prevent election of the IGMP querier.

Procedure

Create a VLAN and add interfaces to the VLAN.

<HUAWEI> system-view
[HUAWEI] sysname Switch
[Switch] vlan 10
[Switch-vlan10] quit
[Switch] interface gigabitethernet 0/0/1
[Switch-GigabitEthernet0/0/1] port link-type hybrid
[Switch-GigabitEthernet0/0/1] port hybrid pvid vlan 10
[Switch-GigabitEthernet0/0/1] port hybrid untagged vlan 10
[Switch-GigabitEthernet0/0/1] quit
[Switch] interface gigabitethernet 0/0/2
[Switch-GigabitEthernet0/0/2] port link-type hybrid
[Switch-GigabitEthernet0/0/2] port hybrid pvid vlan 10
[Switch-GigabitEthernet0/0/2] port hybrid untagged vlan 10
[Switch-GigabitEthernet0/0/2] quit
[Switch] interface gigabitethernet 0/0/3
[Switch-GigabitEthernet0/0/3] port link-type hybrid
[Switch-GigabitEthernet0/0/3] port hybrid pvid vlan 10
[Switch-GigabitEthernet0/0/3] port hybrid untagged vlan 10
[Switch-GigabitEthernet0/0/3] quit

Enable IGMP snooping.
# Enable IGMP snooping globally.
```
[Switch] igmp-snooping enable
```
# Enable IGMP snooping in VLAN 10.
```
[Switch] vlan 10
[Switch-vlan10] igmp-snooping enable
```
# Configure IGMPv3 snooping to enable the Switch to process IGMP messages of all versions.
```
[Switch-vlan10] igmp-snooping version 3
```

Enable IGMP snooping proxy.

[Switch-vlan10] igmp-snooping proxy
[Switch-vlan10] quit

Disable the switch from sending IGMP Query messages to the upstream router.

[Switch] interface gigabitethernet 0/0/3
[Switch-GigabitEthernet0/0/3] igmp-snooping proxy-uplink-port vlan 10
[Switch-GigabitEthernet0/0/3] quit

Verify the configuration.

# Check IGMP message statistics on the switch.

[Switch] display igmp-snooping statistics vlan 10
 IGMP Snooping Packets Counter
   Statistics for VLAN 10
     Recv V1 Report   0
     Recv V2 Report   121
     Recv V3 Report   0
     Recv V1 Query    0
     Recv V2 Query    0
     Recv V3 Query    20
     Recv Leave       82
     Recv Pim Hello   0
     Send Query(S=0)  0
     Send Query(S!=0) 0
     Suppress Report         0
     Suppress Leave          0
     Proxy Send General Query          135
     Proxy Send Group-Specific Query        95
     Proxy Send Group-Source-Specific Query 0

The command output shows that the IGMP snooping proxy has taken effect, and the switch functions as a proxy to send IGMP General Query messages.

Configuration Files

Switch configuration file

#
sysname Switch
#
vlan batch 10
#
igmp-snooping enable
#
vlan 10
 igmp-snooping enable
 igmp-snooping version 3
 igmp-snooping proxy
#
interface GigabitEthernet0/0/1
 port link-type hybrid
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
#
interface GigabitEthernet0/0/2
 port link-type hybrid
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
#
interface GigabitEthernet0/0/3
 port link-type hybrid
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
 igmp-snooping proxy-uplink-port vlan 10 
#
return