Example for Associating a Multicast VLAN with Specified User VLANs

This section provides an example for associating a multicast VLAN with specified user VLANs.

Context

On the network shown in Figure 1, Device A's GE 0/1/1 connects to Device B, and Device A's GE 0/1/2 and GE 0/1/3 connect to VLAN 100 and VLAN 200 respectively. Users in VLAN 100 and VLAN 200 request data from the same multicast source. Therefore, Device A requests a separate copy of data for VLAN 100 and VLAN 200 from Device B, consuming bandwidth resources and increasing the workload of Device B.

To resolve this issue, configure a multicast VLAN (VLAN 10) on Device A for the two user VLANs, so that Device A uses VLAN 10 to request only one copy of data from Device B and then replicates a separate copy for VLAN 100 and VLAN 200.

Figure 1 Associating a multicast VLAN with specified user VLANs

Interfaces 1 through 3 in this example represent GE 0/1/1, GE 0/1/2, and GE 0/1/3, respectively.

Configuration Roadmap

The configuration roadmap is as follows:

Create a multicast VLAN and user VLANs.
Enable the multicast VLAN function.
Associate the multicast VLAN with the user VLANs.
Add Device A's interfaces to VLANs.

Data Preparation

To complete the configuration, you need the following data:

Device A's interface connected to an upstream device: GE 0/1/1; GE 0/1/1's VLAN ID: 10
Device A's interfaces connected to user VLANs: GE 0/1/2 and GE 0/1/3; GE 0/1/2's VLAN ID: 100; GE 0/1/3's VLAN ID: 200

Procedure

Create a multicast VLAN and user VLANs.

# Create a multicast VLAN.

<HUAWEIA> system-view
[~HUAWEI] sysname DeviceA
[*HUAWEI] commit
[~DeviceA] igmp-snooping enable
[*DeviceA] vlan 10
[*DeviceA-vlan10] igmp-snooping enable
[*DeviceA-vlan10] commit
[~DeviceA-vlan10] quit

# Create user VLANs.

[~DeviceA] vlan batch 100 200
[*DeviceA] commit

Enable the multicast VLAN function.

[~DeviceA] vlan 10
[*DeviceA-vlan10] multicast-vlan enable
[*DeviceA-vlan10] commit

Associate the multicast VLAN with the user VLANs.

[~DeviceA-vlan10] multicast-vlan user-vlan 100
[*DeviceA-vlan10] multicast-vlan user-vlan 200
[*DeviceA-vlan10] commit
[~DeviceA-vlan10] quit

Add Device A's interfaces to VLANs.

# Add GE 0/1/1 to VLAN 10.

[~DeviceA] interface gigabitethernet 0/1/1
[~DeviceA-GigabitEthernet0/1/1] undo shutdown
[~DeviceA-GigabitEthernet0/1/1] portswitch
[*DeviceA-GigabitEthernet0/1/1] port trunk allow-pass vlan 10
[*DeviceA-GigabitEthernet0/1/1] commit
[~DeviceA-GigabitEthernet0/1/1] quit

# Add GE 0/1/2 to VLAN 100.

[~DeviceA] interface gigabitethernet 0/1/2
[~DeviceA-GigabitEthernet0/1/2] undo shutdown
[~DeviceA-GigabitEthernet0/1/2] portswitch
[*DeviceA-GigabitEthernet0/1/2] port trunk allow-pass vlan 100
[*DeviceA-GigabitEthernet0/1/2] commit
[~DeviceA-GigabitEthernet0/1/2] quit

# Add GE 0/1/3 to VLAN 200.

[~DeviceA] interface gigabitethernet 0/1/3
[~DeviceA-GigabitEthernet0/1/3] undo shutdown
[~DeviceA-GigabitEthernet0/1/3] portswitch
[*DeviceA-GigabitEthernet0/1/3] port trunk allow-pass vlan 200
[*DeviceA-GigabitEthernet0/1/3] commit
[~DeviceA-GigabitEthernet0/1/3] quit

Verify the configuration.

After completing the configurations, run the display multicast-vlan command to view configurations of the multicast VLAN.

[~DeviceA] display multicast-vlan vlan 10
 Multicast-vlan          : 10
 User-vlan Number        : 2
 IGMP snooping state     : Enable
 Prune-source-port state : Disable
 User-vlan              Snooping-state
 -----------------------------------------------
 100                    IGMP Enable
 200                    IGMP Enable

Run the display user-vlan command to view configurations of the user VLANs.

[~DeviceA] display user-vlan vlan
 Total user vlan   2
 user-vlan  snooping-state  multicast-vlan  snooping-state
 ---------------------------------------------------------
 100       IGMP Enable     10             IGMP Enable
 200       IGMP Enable     10             IGMP Enable

The command output shows the user VLAN IDs and the multicast VLAN ID of the user VLANs.

Configuration Files

Device A configuration file

#
sysname DeviceA
#
vlan batch 10 100 200
#
igmp-snooping enable
#
vlan 10
 igmp-snooping enable
 multicast-vlan enable
 multicast-vlan user-vlan 100 200
#
interface gigabitethernet 0/1/1
 portswitch
 undo shutdown
 port trunk allow-pass vlan 10
#
interface gigabitethernet 0/1/2
 portswitch
 undo shutdown
 port trunk allow-pass vlan 100
#
interface gigabitethernet 0/1/3
 portswitch
 undo shutdown
 port trunk allow-pass vlan 200
#
return