Example for Configuring an EVC to Transmit Layer 3 Multicast Services

This section provides an example for configuring an EVC to transmit Layer 3 multicast services.

Networking Requirements

An EVC applies to Layer 2 interfaces and does not support IP address configuration. To enable an EVC-capable BD to communicate with Layer 3 interfaces, configure a logical VBDIF interface for the BD. Then, the EVC can be used to transmit Layer 3 multicast services, simplifying network planning and management.

On the Layer 3 network shown in Figure 1, configure Subinterface1.1 as a VBDIF interface.

Figure 1 Configuring an EVC to transmit Layer 3 multicast services

Subinterface 1.1, interface 1, and interface 2 in this example represent GE 0/1/1.1, GE 0/1/1, and GE 0/1/2, respectively.



Configuration Roadmap

The configuration roadmap is as follows:

  1. Create an EVC model.

    1. Configure a BD to forward services.

    2. Create an EVC Layer 2 sub-interface and add the sub-interface to the BD.

    3. Create a VBDIF interface.

  2. Assign IP addresses to interfaces and configure a unicast routing protocol.

  3. Configure Layer 3 multicast.

    1. Enable multicast routing.

    2. Configure basic PIM-SM functions.

    3. Configure an IGMP static group and simulate user Join messages.

    4. Configure an RP.

Data Preparation

To complete the configuration, you need the following data:

  • Multicast group address: 225.1.0.0

  • Multicast source address: 10.0.0.1

  • BD ID

Procedure

  1. Create an EVC model.

    1. Create a BD on Device B.

      # Configure Device B.

      <HUAWEI> system-view
[~HUAWEI] sysname Device B
[*HUAWEI] commit
[~Device B] bridge-domain 10
[*Device B-bd10] commit
[~Device B-bd10] quit

    2. Create an EVC Layer 2 sub-interface, add the sub-interface to the BD, and specify the traffic encapsulation type and behavior on the sub-interface.

      # Configure Device B.

      [*Device B] interface gigabitethernet 0/1/1
[*Device B-GigabitEthernet0/1/1] undo shutdown
[*Device B-GigabitEthernet0/1/1] quit
[*Device B] interface gigabitethernet 0/1/1.1 mode l2
[*Device B-GigabitEthernet0/1/1.1] encapsulation dot1q vid 10
[*Device B-GigabitEthernet0/1/1.1] rewrite pop single
[*Device B-GigabitEthernet0/1/1.1] bridge-domain 10
[*Device B-GigabitEthernet0/1/1.1] commit
[~Device B-GigabitEthernet0/1/1] quit

    3. Create a VBDIF interface.

      # Configure Device B.

      [~Device B] interface vbdif 10
[*Device B-Vbdif10] commit
[~Device B-Vbdif10] quit

    4. Verify the configuration.

      After completing the configuration, run the display bridge-domain command to check the BD to which the EVC Layer 2 sub-interface is added and the BD status. The following example uses the command output on Device A.

      [~Device B] display bridge-domain
The total number of bridge-domains is : 1
--------------------------------------------------------------------------------
MAC_LRN: MAC learning;         STAT: Statistics;         SPLIT: Split-horizon;
BC: Broadcast;                 MC: Unknown multicast;    UC: Unknown unicast;
*down: Administratively down;  FWD: Forward;             DSD: Discard;
--------------------------------------------------------------------------------

BDID  State MAC-LRN STAT    BC  MC  UC  SPLIT   Description
--------------------------------------------------------------------------------
10    up    enable  disable FWD FWD FWD disable

  2. Assign IP addresses to interfaces and configure a unicast routing protocol.

    # Configure Device B.

    [~Device B] isis 1
[*Device B-isis-1] network-entity 10.0000.0000.0002.00
[*Device B-isis-1] commit
[~Device B-isis-1] quit 
[~Device B] interface gigabitEthernet 0/1/2
[~Device B-GigabitEthernet0/1/2] ip address 192.168.1.2 24 
[*Device B-GigabitEthernet0/1/2] isis enable 1 
[*Device B-GigabitEthernet0/1/2] quit 
[*Device B] interface vbdif 10
[*Device B-Vbdif10] ip address 192.168.2.1 24
[*Device B-Vbdif10] isis enable 1 
[*Device B-Vbdif10] quit 
[*Device B] commit

    The configuration of Device A is similar to the configuration of Device B. For configuration details, see Configuration Files in this section.

  3. Configure Layer 3 multicast.

    1. Enable multicast routing on each Device A and Device B. Enable PIM-SM on each interface.

      [~Device B] multicast routing-enable
[*Device B] interface gigabitEthernet 0/1/2
[*Device B-GigabitEthernet0/1/2] pim sm
[*Device B-GigabitEthernet0/1/2] quit
[*Device B] interface vbdif 10
[*Device B-Vbdif10] pim sm
[*Device B-Vbdif10] igmp enable
[*Device B-Vbdif10] igmp version 3
[*Device B-Vbdif10] quit
[*Device B] commit

      The configuration of Device A is similar to the configuration of Device B. For configuration details, see Configuration Files in this section.

    2. On Device B, configure a static IGMP group on GE 0/1/1.1 connected to user hosts. Simulate user Join messages.

      [~Device B] interface gigabitEthernet 0/1/1.1
[~Device B-GigabitEthernet0/1/1.1] l2-multicast static-group source-address 10.0.0.1 group-address 225.0.0.1 dot1q vid 10
[*Device B-GigabitEthernet0/1/1.1] quit
[*Device B] commit

    3. Configure a C-BSR and C-RP on Device A.

      [~Device A] pim
[*Device A-pim] c-bsr gigabitEthernet 0/1/2
[*Device A-pim] c-rp gigabitEthernet 0/1/2
[*Device A-pim] quit
[*Device A] commit

  4. Verify the configuration.

    # Run the display pim interface command on Device B to check whether PIM-SM is enabled.

    [~Device B] display pim interface 
 VPN-Instance: public net

 Interface           State NbrCnt HelloInt   DR-Pri     DR-Address
 GE0/1/2             up    0      30         1          192.168.1.2 (local)
 Vbdif10             up    1      30         1          192.168.2.1 (local)

    The command output shows that PIM-SM is enabled on VBDIF 10.

    # Run the display pim routing table command on Device B to check the IPv4 routing table.

    [~Device B] display pim routing table 
 (10.0.0.1, 225.0.0.1)
     RP: 192.168.1.1 
     Protocol: pim-sm, Flag: SPT SG_RCVR 
     UpTime: 00:25:11     
     Upstream interface: GigabitEthernet0/1/2
         Upstream neighbor: 192.168.1.1
         RPF prime neighbor: 192.168.1.1
     Downstream interface(s) information:
     Total number of downstreams: 1
        1: Vbdif10
             Protocol: igmp, UpTime: 00:25:11, Expires: -

Configuration Files

  • Device A configuration file

    #
sysname Device A
#
multicast routing-enable
#
isis 1
 network-entity 10.0000.0000.0001.00 
#
interface GigabitEthernet0/1/1
 undo shutdown
 ip address 10.0.0.1 255.255.255.0
interface GigabitEthernet0/1/2
 undo shutdown  
 ip address 192.168.1.1 255.255.255.0
 pim sm
 isis enable 1
#
pim
 c-bsr GigabitEthernet0/1/2
 c-rp GigabitEthernet0/1/2
#
return

  • Device B configuration file

    #
sysname Device B
#
multicast routing-enable
#
bridge-domain 10
#
isis 1
 network-entity 10.0000.0000.0002.00 
#
interface Vbdif10
 ip address 192.168.2.1 255.255.255.0
 pim sm
 igmp enable 
 igmp version 3
 isis enable 1
#
interface GigabitEthernet0/1/1
 undo shutdown
#
interface GigabitEthernet0/1/1.1 mode l2
 encapsulation dot1q vid 10
 rewrite pop single
 bridge-domain 10
 l2-multicast static-group source-address 10.0.0.1 group-address 225.0.0.1 dot1q vid 10
#
interface GigabitEthernet0/1/2
 undo shutdown  
 ip address 192.168.1.2 255.255.255.0
 pim sm         
 isis enable 1  
#
return
Parent Topic: Configuration Examples for EVC
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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