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NE40E V800R010C10SPC500 Configuration Guide - IP Multicast 01

This is NE40E V800R010C10SPC500 Configuration Guide - IP Multicast
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Configuring IPv6 User-Side Multicast

Configuring IPv6 User-Side Multicast

User-side multicast enables a BRAS on an IPv6 network to identify users that have joined or left a multicast group, implementing user-based multicast service control and management.

Usage Scenario

Conventional multicast cannot well support IPTV services on IPv6 networks because it cannot identify users. Carriers need to have user-side multicast supported to identify users for better management. With user-side multicast, the BRAS can identify users in a multicast group and implement refined user service control and management.

Pre-configuration Tasks

Before configuring IPv6 user-side multicast, complete the tasks shown in Figure 15-2. For configuration details, see Table 15-1.

Figure 15-2 Pre-configuration tasks for user-side multicast configurations in IPv6

Table 15-1 Description of each pre-configuration task

Item

Description

Configure a local prefix pool and a local address pool. Bind the local prefix pool to the local address pool.

Configure Authentication, Authorization and Accounting (AAA) schemes.

Configure a domain and bind the local address pool to the domain.

Configure the PPPoE or IPoE access mode.
  • Configure the PPPoE access mode.

  • Configure the IPoE access mode.

Configure basic multicast functions.
  1. Enable IPv6 multicast routing.

  2. Enable IPv6 PIM-SM.

  3. Enable MLD.

Configure a BAS interface.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number [ .subinterface-number ]

    The interface or sub-interface view is displayed.

    The interface can be a main, a common sub-interface, or a QinQ sub-interface.

  3. Run bas

    A BAS interface is created, and the BAS interface view is displayed.

  4. Configure a multicast replication mode.

    NOTE:

    By default, multicast replication by interface is used.

    • To use multicast replication by interface + VLAN, run the multicast copy by-vlan command.
      NOTE:

      In a scenario where multiple users order a multicast program through the same interface and VLAN and MLD snooping is enabled on the downstream Layer 2 device, after multicast replication by interface + VLAN is configured, the BRAS replicates only one copy of a multicast traffic flow for the downstream Layer 2 device. Then, the downstream Layer 2 device replicates multicast data packets as needed. This replication mode therefore reduces the burden on the BRAS and the bandwidth consumption. This mode applies to scenarios where user packets carry VLAN tags and inter-VLAN traffic forwarding is not needed.

    • To use multicast replication by user (session), run the multicast copy by-session command.

      In a scenario where the downstream Layer 2 device is incapable of MLD snooping, after multicast replication by user is configured, the BRAS replicates multicast packets for each authenticated user. This mode prevents the BRAS from replicating multicast packets for users who fail to be authenticated, thus implementing refined user service control and management.

    • To use multicast replication by multicast VLAN, perform the following steps:

      1. Run the quit command to return to the main or sub-interface view.

      2. Run the multicast user-aggregation command to configure multicast replication by multicast VLAN.

        This replication mode applies to scenarios where users have joined multicast VLANs. In this mode, the BRAS replicates multicast packets based on multicast VLANs, and the downstream Layer 2 device replicates multicast packets based on user VLANs. For users who go online through the same interface and join the same multicast program, the BRAS replicates only one copy of a multicast traffic flow to the downstream Layer 2 device, irrespective of whether the users belong to the same VLAN. The downstream Layer 2 device then replicates multicast packets based on user VLANs. This replication mode reduces the burden on the BRAS and the bandwidth consumption. This mode applies to scenarios where user packets carry VLAN tags and inter-VLAN traffic forwarding is needed.

    NOTE:

    If all of the preceding multicast replication modes are configured, their priorities are as follows in descending order: replication by interface + VLAN, replication by user, replication by multicast VLAN, and replication by interface.

  5. Run commit

    The configuration is committed.

Checking the Configurations

Run the following commands to check statistics about MLD messages:

  • Run the display mld-snooping bas invalid-packet command to check statistics about invalid MLD messages on BAS interfaces.
    <HUAWEI> display mld-snooping bas invalid-packet all
    
               Statistics of invalid packets for all users:
    --------------------------------------------------------------------
    MLD Snooping General invalid packet:
    Fault Length             : 0           Invalid MLD Type         : 0
    Bad Checksum             : 0           Fault RouterAlert        : 0
    
    MLD Snooping Query invalid packet:
    Invalid Multicast Source : 0           Invalid Multicast Group  : 0
    
    MLD Snooping Done invalid packet:
    Invalid MLD Version      : 0           Invalid Multicast Group  : 0
    
    MLD Snooping Report invalid packet:
    Invalid MLD Version      : 0           Invalid Multicast Group  : 0
    Invalid Multicast Source : 0
    --------------------------------------------------------------------

Run the following command to display information about users and the multicast programs they join:

  • Run the display multicast user-id command to check information about multicast programs that a specified user joins on a BAS interface.
    <HUAWEI> display multicast user-id 65
      User information:
      User ID             :65
      User IPv6 address   :2015::10:9C00:8100:27E3
      Gateway IPv6 address:FE80::200:14FF:FE00:571
      BRAS interface      :Eth-Trunk1
      User MAC-address    :0010-9c00-27e3
      MAX program list    :4
    
      User order program:
      Group IP           Source IP
      FF17::1            0.0.0.0
    
      Total:1
  • Run the display multicast group-ip command to check information about users of a specified multicast group.
    <HUAWEI> display multicast group-ip FF17::1 out-interface Eth-Trunk 1
      User ID    User IP                     User type    Interface
    
      65         2015::10:9C00:8100:27E3     Local        Eth-Trunk1
    
      Local user number :1
      Remote user number:0
      Total user number :1  
  • Run the display mld-snooping bas port-info command to check information about programs and their users on a BAS interface.
    <HUAWEI> display mld-snooping bas port-info interface Eth-Trunk 1
    VPN-Instance: public net
      Interface Eth-Trunk1, 1 Group(s)
      (Source, Group)                          UserID LiveTime    Mode   Flag
      ---------------------------------------------------------------------------
      (::, FF17::1)                            65     03:50:27    IN     -D-

Run the following commands to check IPv6 multicast routing entries:

  • Run the display multicast ipv6 routing-table command to check information about IPv6 multicast routing entries.
    Multicast routing table of VPN-Instance: public net
     Total 1 entry
    
     00001. (2001:db8:1::2, FF18::1)
           Uptime: 01:00:39
           Upstream Interface: GigabitEthernet1/0/0
           List of 1 downstream interface
               1: GigabitEthernet1/0/1(bas)
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Updated: 2019-01-03

Document ID: EDOC1100055017

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