Procedure
l Run the display l2-multicast forwarding-table vlan vlan-id [ source-address source-
address group-address group-address ] command to check the multicast forwarding table
of a VLAN.
----End
Example
Run the display l2-multicast forwarding-table vlan 10 command, and you can view the
multicast forwarding table of VLAN 10.
<Quidway> display l2-multicast forwarding-table vlan 10
VLAN ID : 10, Forwarding Mode : IP
--------------------------------------------------------------------
(Source, Group) Interface Out-Vlan
--------------------------------------------------------------------
Router-port GigabitEthernet1/0/1 10
(*, 225.1.1.1) GigabitEthernet1/0/1 10
GigabitEthernet1/0/2 10
(*, 225.1.1.2) GigabitEthernet1/0/1 10
GigabitEthernet1/0/2 10
(*, 225.1.1.3) GigabitEthernet1/0/1 10
GigabitEthernet1/0/2 10
--------------------------------------------------------------------
Total Group(s) : 3
2.5 Configuring a Static Multicast MAC Address
This section describes how to configure a static multicast MAC address.
2.5.1 Establishing the Configuration Task
Applicable Environment
If a Layer 2 switch receives a multicast data packet whose destination MAC address is not a
multicast MAC address, the switch cannot find the matching entry in the MAC address table.
Therefore, the switch broadcasts the multicast packet in the VLAN. This wastes bandwidth and
threatens network security.
To save bandwidth and ensure network security, configure a static multicast MAC address on
an interface so that multicast packets destined for the multicast MAC address are forwarded only
by this interface.
Pre-configuration Tasks
Before configuring a static multicast MAC address, complete the following task:
l Creating a VLAN and adding the interface that needs to be configured with a static multicast
MAC address to the VLAN
Data Preparation
To configure a static multicast MAC address, you need the following data.
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 2 IGMP Snooping Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
29
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