Example for Configuring Layer 2 Multicast SSM Mapping
This section provides an example for configuring Layer 2 multicast SSM mapping.
Networking Requirements
On the network shown in Figure 1, PE1 is connected to PE2 through GE 0/1/0, and they both belong to VLAN 10. GE 0/1/0 on PE2 is a static router port.
IGMPv3 is running on PE1 while IGMPv2 is running on PE2.
Then, SSM mapping needs to be configured on PE1 so that PE1 can map the multicast group addresses of the received packets with no source addresses to specific sources. In addition, the querier function needs to be enabled for VLAN 10 on PE1 so that PE1 can send Query messages periodically to PE2.
Configuration Roadmap
The configuration roadmap is as follows:
Create VLANs and enable basic IGMP snooping functions.
Configure the version numbers of IGMP snooping running on PE1 and PE2.
Enable the querier function for VLAN 10 on PE1.
Configure GE 0/1/0 on PE2 as a static router port.
Configure an IGMP snooping SSM policy.
Data Preparation
To complete the configuration, you need the following data:
VLAN ID: 10
IGMP snooping version number: 3 on PE1 and 2 on PE2
Static multicast group address: 224.1.1.1
Procedure
- Create VLANs.
# Configure PE1.
<HUAWEI> system-view [~HUAWEI] sysname PE1 [*HUAWEI] commit [~PE1] interface gigabitethernet0/1/0 [~PE1-GigabitEthernet0/1/0] portswitch [*PE1-GigabitEthernet0/1/0] undo shutdown [*PE1-GigabitEthernet0/1/0] quit [*PE1] vlan 10 [*PE1-vlan10] port gigabitethernet 0/1/0 [*PE1-vlan10] commit [~PE1-vlan10] quit
# Configure PE2.
<HUAWEI> system-view [~HUAWEI] sysname PE2 [*HUAWEI] commit [~PE2] interface gigabitethernet 0/1/0 [~PE2-GigabitEthernet0/1/0] portswitch [*PE2-GigabitEthernet0/1/0] undo shutdown [*PE2-GigabitEthernet0/1/0] quit [*PE2] vlan 10 [*PE2-vlan10] port gigabitethernet 0/1/0 [*PE2-vlan10] commit [~PE2-vlan10] quit
- Enable global IGMP snooping and IGMP snooping in a VLAN.
# Configure PE1.
[~PE1] igmp-snooping enable [*PE1] vlan 10 [*PE1-vlan10] igmp-snooping enable [*PE1-vlan10] commit
# Configure PE2.
[~PE2] igmp-snooping enable [*PE2] vlan 10 [*PE2-vlan10] igmp-snooping enable [*PE2-vlan10] igmp-snooping report-suppress [*PE2-vlan10] commit
- Configure the version numbers of IGMP snooping running on PE1 and PE2.
# Configure PE1.
[~PE1-vlan10] igmp-snooping version 3 [*PE1-vlan10] commit
# Configure PE2.
[*PE2-vlan10] igmp-snooping version 2 [*PE2-vlan10] commit
- Enable the querier function for VLAN 10 on PE1 so that PE1 can send general Query messages to PE2.
[~PE1] igmp-snooping send-query enable [*PE1] vlan 10 [*PE1-vlan10] igmp-snooping querier enable [*PE1-vlan10] commit [~PE1-vlan10] quit
- Configure GE 0/1/0 on PE2 as a static router port and statically add GE 0/1/1 on PE2 to the multicast group with group address being 224.1.1.1.
[~PE2] interface gigabitethernet 0/1/0 [*PE2-GigabitEthernet0/1/0] igmp-snooping static-router-port vlan 10 [*PE2] interface gigabitethernet 0/1/1 [*PE2-GigabitEthernet0/1/1] portswitch [*PE2-GigabitEthernet0/1/1] undo shutdown [*PE2-GigabitEthernet0/1/1] port trunk allow-pass vlan 10 [*PE2-GigabitEthernet0/1/1] l2-multicast static-group group-address 224.1.1.1 vlan 10 [*PE2-GigabitEthernet0/1/1] commit [~PE2-GigabitEthernet0/1/1] quit
- Configure an IGMP snooping SSM policy.
[~PE1] acl number 2008 [*PE1-acl-basic-2008] rule 5 permit source 224.1.1.1 0 [*PE1-acl-basic-2008] quit [*PE1] vlan 10 [*PE1-vlan10] igmp-snooping ssm-policy 2008 [*PE1-vlan10] igmp-snooping ssm-mapping enable [*PE1-vlan10] igmp-snooping ssm-mapping 224.1.1.1 24 10.1.1.2 [*PE1-vlan10] igmp-snooping ssm-mapping 224.1.1.1 24 10.1.1.3 [*PE1-vlan10] igmp-snooping ssm-mapping 224.1.1.1 24 10.1.1.4 [*PE1-vlan10] commit
- Verify the configuration.
# After completing the configurations, run the display igmp-snooping vlan configuration command on PE1 to view information about the VLAN.
[~PE1] display igmp-snooping vlan configuration IGMP Snooping Configuration for VLAN 10 igmp-snooping enable igmp-snooping version 3 igmp-snooping querier enable igmp-snooping ssm-mapping enable igmp-snooping ssm-policy 2008 igmp-snooping ssm-mapping 224.1.1.1 255.255.255.0 10.1.1.2 igmp-snooping ssm-mapping 224.1.1.1 255.255.255.0 10.1.1.3 igmp-snooping ssm-mapping 224.1.1.1 255.255.255.0 10.1.1.4# After PE1 receives a Report message, run the display igmp-snooping port-info command to view configurations of the interface. In the command output, Source indicates a multicast source IP address, and Group indicates a multicast group IP address.
[~PE1] display igmp-snooping port-info ----------------------------------------------------------------------------------- Flag: S:Static D:Dynamic M:Ssm-mapping A:Active P:Protocol F:Fast-channel (Source, Group) Port Flag ------------------------------------------------------------------------------- VLAN 10, 3 Entry(s) (10.1.1.2, 224.1.1.1) P-- GigabitEthernet0/1/0 --M 1 port(s) include (10.1.1.3, 224.1.1.1) P-- GigabitEthernet0/1/0 --M 1 port(s) include (10.1.1.4, 224.1.1.1) P-- GigabitEthernet0/1/0 --M 1 port(s) include -------------------------------------------------------------------------------
Configuration Files
PE1 configuration file
# sysname PE1 # vlan batch 10 # igmp-snooping enable igmp-snooping send-query enable # vlan 10 igmp-snooping enable igmp-snooping querier enable igmp-snooping ssm-mapping enable igmp-snooping version 3 igmp-snooping ssm-policy 2008 igmp-snooping ssm-mapping 224.1.1.1 255.255.255.0 10.1.1.2 igmp-snooping ssm-mapping 224.1.1.1 255.255.255.0 10.1.1.3 igmp-snooping ssm-mapping 224.1.1.1 255.255.255.0 10.1.1.4 # acl number 2008 rule 5 permit source 224.1.1.1 0 # interface GigabitEthernet0/1/0 undo shutdown portswitch port default vlan 10 # return
PE2 configuration file
# sysname PE2 # vlan batch 10 # igmp-snooping enable # vlan 10 igmp-snooping enable igmp-snooping report-suppress # interface GigabitEthernet0/1/0 undo shutdown portswitch port default vlan 10 igmp-snooping static-router-port vlan 10 # interface GigabitEthernet0/1/1 undo shutdown portswitch port trunk allow-pass vlan 10 l2-multicast static-group group-address 224.1.1.1 vlan 10 # return