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AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009 CLI-based Configuration Guide - IP Unicast Routing
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Example for Configuring Basic MBGP Functions

Example for Configuring Basic MBGP Functions

Networking Requirements

As shown in Figure 9-28, the receiver receives VoD information in multicast mode. The receiver and the source reside in different ASs. Multicast routing information needs to be transmitted between ASs.

Figure 9-28 Networking diagram of configuring MBGP

Device

Interface

IP Address

Device

Interface

IP Address

RouterA

GE1/0/0

10.1.1.1/24

RouterC

GE1/0/0

10.4.1.1/24

GE2/0/0

10.10.10.1/24

GE2/0/0

10.168.1.1/24

Loopback0

1.1.1.1/32

GE3/0/0

10.2.1.1/24

RouterB

GE1/0/0

10.1.1.2/24

Loopback0

3.3.3.3/32

GE2/0/0

10.3.1.2/24

RouterD

GE1/0/0

10.4.1.2/24

GE3/0/0

10.2.1.2/24

GE2/0/0

10.3.1.1/24

Loopback0

2.2.2.2/32

Loopback0

4.4.4.4/32

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure MBGP peers for inter-AS multicast transmission.

  2. Configure the routes advertised by MBGP.

  3. Enable the multicast function on each router.

  4. Configure basic PIM-SM functions on each router in ASs and enable IGMP on receiver-side interfaces.

  5. Configure a BSR boundary on the interfaces that connect to two ASs.

  6. Configure MSDP peers to transmit inter-domain multicast source information.

Procedure

  1. Assign IP addresses to the interfaces on each router and configure OSPF in ASs.

    # Configure IP addresses and masks for the interfaces on each router according to Figure 9-28 and configure OSPF on the routers in ASs. Ensure that Router B, Router C, Router D can communicate with the receiver at the network layer, learn routes to the loopback interfaces of each other, and dynamically update routes using a unicast routing protocol. Configure OSPF process 1. The configuration procedure is not mentioned here.

  2. Configure BGP, enable the MBGP protocol, and configure MBGP peers.

    # Configure BGP and the MBGP peer on Router A.

    <Huawei> system-view
    [Huawei] sysname RouterA
    [RouterA] bgp 100
    [RouterA-bgp] peer 10.1.1.2 as-number 200
    [RouterA-bgp] ipv4-family multicast
    [RouterA-bgp-af-multicast] peer 10.1.1.2 enable
    [RouterA-bgp-af-multicast] quit
    [RouterA-bgp] quit

    # Configure BGP and the MBGP peer on Router B.

    [RouterB] bgp 200
    [RouterB-bgp] peer 10.1.1.1 as-number 100
    [RouterB-bgp] peer 10.2.1.1 as-number 200
    [RouterB-bgp] peer 10.3.1.1 as-number 200
    [RouterB-bgp] ipv4-family multicast
    [RouterB-bgp-af-multicast] peer 10.1.1.1 enable
    [RouterB-bgp-af-multicast] peer 10.2.1.1 enable
    [RouterB-bgp-af-multicast] peer 10.3.1.1 enable
    [RouterB-bgp-af-multicast] quit
    [RouterB-bgp] quit

    # Configure BGP and the MBGP peer on Router C.

    [RouterC] bgp 200
    [RouterC-bgp] peer 10.2.1.2 as-number 200
    [RouterC-bgp] peer 10.4.1.2 as-number 200
    [RouterC-bgp] ipv4-family multicast
    [RouterC-bgp-af-multicast] peer 10.2.1.2 enable
    [RouterC-bgp-af-multicast] peer 10.4.1.2 enable
    [RouterC-bgp-af-multicast] quit
    [RouterC-bgp] quit

    # Configure BGP and the MBGP peer on Router D.

    [RouterD] bgp 200
    [RouterD-bgp] peer 10.3.1.2 as-number 200
    [RouterD-bgp] peer 10.4.1.1 as-number 200
    [RouterD-bgp] ipv4-family multicast
    [RouterD-bgp-af-multicast] peer 10.3.1.2 enable
    [RouterD-bgp-af-multicast] peer 10.4.1.1 enable
    [RouterD-bgp-af-multicast] quit
    [RouterD-bgp] quit

  3. Configure the routes to be advertised.

    # Configure the routes to be advertised on Router A.

    [RouterA] bgp 100
    [RouterA-bgp] import-route direct
    [RouterA-bgp] ipv4-family multicast
    [RouterA-bgp-af-multicast] import-route direct
    [RouterA-bgp-af-multicast] quit
    [RouterA-bgp] quit

    # Configure the routes to be advertised on Router B.

    [RouterB] bgp 200
    [RouterB-bgp] import-route direct
    [RouterB-bgp] import-route ospf 1
    [RouterB-bgp] ipv4-family multicast
    [RouterB-bgp-af-multicast] import-route direct
    [RouterB-bgp-af-multicast] import-route ospf 1
    [RouterB-bgp-af-multicast] quit
    [RouterB-bgp] quit

    # Configure the routes to be advertised on Router C. The configuration of Router D is similar to the configuration of Router C, and is not mentioned here.

    [RouterC] bgp 200
    [RouterC-bgp] import-route direct
    [RouterC-bgp] ipv4-family multicast
    [RouterC-bgp-af-multicast] import-route direct
    [RouterC-bgp-af-multicast] import-route ospf 1
    [RouterC-bgp-af-multicast] quit
    [RouterC-bgp] quit

  4. Enable the multicast function on each Router and interfaces on the Routers.

    # Configure Router A.

    [RouterA] multicast routing-enable
    [RouterA] interface gigabitethernet 1/0/0
    [RouterA-GigabitEthernet1/0/0] pim sm
    [RouterA-GigabitEthernet1/0/0] quit
    [RouterA] interface gigabitethernet 2/0/0
    [RouterA-GigabitEthernet2/0/0] pim sm
    [RouterA-GigabitEthernet2/0/0] quit

    # Configure Router B.

    [RouterB] multicast routing-enable
    [RouterB] interface gigabitethernet 1/0/0
    [RouterB-GigabitEthernet1/0/0] pim sm
    [RouterB-GigabitEthernet1/0/0] quit
    [RouterB] interface gigabitethernet 2/0/0
    [RouterB-GigabitEthernet2/0/0] pim sm
    [RouterB-GigabitEthernet2/0/0] quit
    [RouterB] interface gigabitethernet 3/0/0
    [RouterB-GigabitEthernet3/0/0] pim sm
    [RouterB-GigabitEthernet3/0/0] quit

    # Configure Router C.

    [RouterC] multicast routing-enable
    [RouterC] interface gigabitethernet 1/0/0
    [RouterC-GigabitEthernet1/0/0] pim sm
    [RouterC-GigabitEthernet1/0/0] quit
    [RouterC] interface gigabitethernet 2/0/0
    [RouterC-GigabitEthernet2/0/0] pim sm
    [RouterC-GigabitEthernet2/0/0] igmp enable
    [RouterC-GigabitEthernet2/0/0] quit
    [RouterC] interface gigabitethernet 3/0/0
    [RouterC-GigabitEthernet3/0/0] pim sm
    [RouterC-GigabitEthernet3/0/0] quit

    # Configure Router D.

    [RouterD] multicast routing-enable
    [RouterD] interface gigabitethernet 1/0/0
    [RouterD-GigabitEthernet1/0/0] pim sm
    [RouterD-GigabitEthernet1/0/0] quit
    [RouterD] interface gigabitethernet 2/0/0
    [RouterD-GigabitEthernet2/0/0] pim sm
    [RouterD-GigabitEthernet2/0/0] quit

  5. Configure the BSR and RP within each AS.

    # Configure Router A.

    [RouterA] interface loopback 0
    [RouterA-LoopBack0] ip address 1.1.1.1 255.255.255.255
    [RouterA-LoopBack0] pim sm
    [RouterA-LoopBack0] quit
    [RouterA] pim
    [RouterA-pim] c-bsr loopback 0
    [RouterA-pim] c-rp loopback 0
    [RouterA-pim] quit

    # Configure Router B.

    [RouterB] interface loopback 0
    [RouterB-LoopBack0] ip address 2.2.2.2 255.255.255.255
    [RouterB-LoopBack0] pim sm
    [RouterB-LoopBack0] quit
    [RouterB] pim
    [RouterB-pim] c-bsr loopback 0
    [RouterB-pim] c-rp loopback 0
    [RouterB-pim] quit

  6. Configure a BSR boundary on the interfaces that connect to two ASs.

    # Configure Router A.

    [RouterA] interface gigabitethernet 1/0/0
    [RouterA-GigabitEthernet1/0/0] pim bsr-boundary
    [RouterA-GigabitEthernet1/0/0] quit

    # Configure Router B.

    [RouterB] interface gigabitethernet 1/0/0
    [RouterB-GigabitEthernet1/0/0] pim bsr-boundary
    [RouterB-GigabitEthernet1/0/0] quit

  7. Configure MSDP peers.

    # Configure Router A.

    [RouterA] msdp
    [RouterA-msdp] peer 10.1.1.2 connect-interface gigabitethernet 1/0/0
    [RouterA-msdp] quit

    # Configure Router B.

    [RouterB] msdp
    [RouterB-msdp] peer 10.1.1.1 connect-interface gigabitethernet 1/0/0
    [RouterB-msdp] quit

  8. Verify the configuration.

    # Run the display bgp multicast peer command to view the MBGP peer relationship between Routers. For example, information about the MBGP peer relationship on Router A is as follows:

    [RouterA] display bgp multicast peer
    

     BGP local router ID : 1.1.1.1
    

     Local AS number : 100
    

     Total number of peers : 1                 Peers in established state : 1
    

    

      Peer        V   AS   MsgRcvd  MsgSent  OutQ  Up/Down        State     PrefRcv
    

      10.1.1.2    4  200        82       75     0 00:30:29  Established          17
    

    # Run the display msdp brief command to view information about the MSDP peer relationship between Routers. For example, brief information about the MSDP peer relationship on Router B is as follows:
    

    [RouterB] display msdp brief
    

    MSDP Peer Brief Information of VPN-Instance: public net
    

      Configured      Up        Listen       Connect      Shutdown     Down
    

      1               1         0            0            0            0
    

    

      Peer's Address     State     Up/Down time    AS     SA Count    Reset Count
    

      10.1.1.1           Up        00:07:17        100    1           0
    

    

    9. 




Configuration Files
    

  • Configuration file of Router A
    

    #
sysname RouterA
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
 ip address 10.1.1.1 255.255.255.0
 pim bsr-boundary
 pim sm
#
interface GigabitEthernet2/0/0
 ip address 10.10.10.1 255.255.255.0
 pim sm
#
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
 pim sm
#
pim
 c-bsr Loopback0
 c-rp Loopback0
#
bgp 100
 peer 10.1.1.2 as-number 200
#
 ipv4-family unicast
  undo synchronization
  import-route direct 
  peer 10.1.1.2 enable
#
 ipv4-family multicast
  undo synchronization
  import-route direct
  peer 10.1.1.2 enable
#
msdp
 peer 10.1.1.2 connect-interface GigabitEthernet1/0/0
#
return
    

    • 

  • Configuration file of Router B
    

    #
 sysname RouterB
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
 ip address 10.1.1.2 255.255.255.0
 pim bsr-boundary 
 pim sm
# 
interface GigabitEthernet2/0/0
 ip address 10.3.1.2 255.255.255.0
 pim sm
# 
interface GigabitEthernet3/0/0
 ip address 10.2.1.2 255.255.255.0
 pim sm
# 
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
 pim sm
#
pim
 c-bsr Loopback0
 c-rp Loopback0
#
ospf 1 
 area 0.0.0.0
  network 10.2.1.0 0.0.0.255
  network 10.3.1.0 0.0.0.255
  network 2.2.2.2 0.0.0.0
#
bgp 200
 peer 10.1.1.1 as-number 100
 peer 10.2.1.1 as-number 200
 peer 10.3.1.1 as-number 200
# 
 ipv4-family unicast
  undo synchronization
  import-route direct 
  import-route ospf 1
  peer 10.1.1.1 enable
  peer 10.2.1.1 enable
  peer 10.3.1.1 enable
# 
 ipv4-family multicast
  undo synchronization
  import-route direct
  import-route ospf 1
  peer 10.1.1.1 enable
  peer 10.2.1.1 enable
  peer 10.3.1.1 enable
# 
msdp
 peer 10.1.1.1 connect-interface GigabitEthernet1/0/0
# 
return
    

    • 

  • Configuration file of Router C
    

    #
 sysname RouterC
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
 ip address 10.4.1.1 255.255.255.0
 pim sm
#
interface GigabitEthernet2/0/0
 ip address 10.168.1.1 255.255.255.0
 pim sm
 igmp enable
#
interface GigabitEthernet3/0/0
 ip address 10.2.1.1 255.255.255.0
 pim sm
# 
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
 pim sm
#
ospf 1 
 area 0.0.0.0
  network 10.2.1.0 0.0.0.255
  network 10.4.1.0 0.0.0.255
  network 10.168.1.0 0.0.0.255
  network 3.3.3.3 0.0.0.0
#
bgp 200
 peer 10.2.1.2 as-number 200
 peer 10.4.1.2 as-number 200
#
 ipv4-family unicast
  undo synchronization
  import-route direct 
  peer 10.2.1.2 enable
  peer 10.4.1.2 enable
#
 ipv4-family multicast
  undo synchronization
  import-route direct
  import-route ospf 1
  peer 10.2.1.2 enable
  peer 10.4.1.2 enable
#
return

    

    • 

  • Configuration file of Router D
    

    #
 sysname RouterD
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
 ip address 10.4.1.2 255.255.255.0
 pim sm
#
interface GigabitEthernet2/0/0
 ip address 10.3.1.1 255.255.255.0
 pim sm
# 
interface Loopback0
 ip address 4.4.4.4 255.255.255.255
 pim sm
#
ospf 1 
 area 0.0.0.0
  network 10.3.1.0 0.0.0.255
  network 10.4.1.0 0.0.0.255
  network 4.4.4.4 0.0.0.0
#
bgp 200
 peer 10.3.1.2 as-number 200
 peer 10.4.1.1 as-number 200
#
 ipv4-family unicast
  undo synchronization
  import-route direct 
  peer 10.3.1.2 enable
  peer 10.4.1.1 enable
#
 ipv4-family multicast
  undo synchronization
  import-route direct
  import-route ospf 1
  peer 10.3.1.2 enable
  peer 10.4.1.1 enable
#
return

    

    • 











            

            
            

        

        
        

            

                
                

                
                    

                        
                            
                                

                                    
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                    Updated: 2022-05-16
                    
                

                
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