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Typical Configuration Examples (V100 and V200)
CloudEngine 16800, 12800, 9800, 8800, 7800, 6800, and 5800 Series Switches
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Example for Configuring Anycast RP Using MSDP

Example for Configuring Anycast RP Using MSDP

Applicable Products and Versions

This example applies to all models (except the CE6810LI) and all versions.

For details about the mapping between software versions and switch models, see the Hardware Query Tool.

Networking Requirements

As shown in Network diagram for configuring Anycast RP, a Protocol Independent Multicast Sparse Mode (PIM-SM) domain contains multiple multicast sources and receivers. Rendezvous points (RPs) in a PIM-SM domain need to be configured as MSDP peers to perform load balancing.

Figure 2-28 Network diagram for configuring Anycast RP
Table 2-6 Data preparation

Device

VLAN and IP Address

Interface Number

Description

SwitchA

VLAN: 105

IP Address: 10.110.5.1/24

10GE1/0/1

S1

VLAN: 101

IP Address: 10.110.1.2/24

10GE2/0/2

SwitchC

SwitchB

VLAN: 106

IP Address: 10.110.6.1/24

10GE1/0/1

S2

VLAN: 102

IP Address: 10.110.2.2/24

10GE2/0/2

SwitchD

SwitchC

VLAN: 100

IP Address: 192.168.1.1/24

10GE1/0/1

SwitchE

VLAN: 101

IP Address: 10.110.1.1/24

10GE2/0/2

SwitchA

VLAN: 104

IP Address: 10.110.4.1/24

10GE3/0/3

User1

10.5.5.5/32

Loopback0

NA

10.3.3.3/32

Loopback1

NA

10.1.1.1/32

Loopback10

NA

SwitchD

VLAN: 300

IP Address: 192.168.3.1/24

10GE1/0/1

SwitchE

VLAN: 102

IP Address: 10.110.2.1/24

10GE2/0/2

SwitchB

VLAN: 103

IP Address: 10.110.3.1/24

10GE3/0/3

User2

10.2.2.2/32

Loopback0

NA

10.4.4.4/32

Loopback1

NA

10.1.1.1/32

Loopback10

NA

SwitchE

VLAN: 300

IP Address: 192.168.3.2/24

10GE1/0/1

SwitchD

VLAN: 100

IP Address: 192.168.1.2/24

10GE2/0/2

SwitchC

Configuration Roadmap

Configure anycast RPs using MSDP so that the receiver sends a Join message to the closest RP and the multicast source sends a Register message to the nearest RP. RPs implement load balancing.

  1. Configure IP addresses for the interfaces on each switch and configure Open Shortest Path First (OSPF) in the PIM-SM domain.

  2. Enable multicast on all switches and PIM-SM on all interfaces, and enable IGMP on interfaces connected to network segments of receiver hosts.

  3. Configure the same Loopback10 address on SwitchC and SwitchD. Configure Loopback10 as a rendezvous point (RP) and Loopback1 as a candidate bootstrap router (C-BSR)

  4. Configure MSDP peers on Loopback0 interfaces of SwitchC and SwitchD. According to reverse path forwarding (RPF) rules, the switches receive Source-Active (SA) messages from the source RP.

Procedure

  1. Configure IP addresses for interfaces and configure a unicast routing protocol on each switch.

    # According to Data preparation, configure IP addresses and masks for the interfaces in the PIM-SM domain. Configure OSPF between switches. The configuration details are not mentioned here.

  2. Enable multicast routing and configure PIM-SM.

    # Enable multicast routing on all switches and PIM-SM on all interfaces. Enable IGMP on interfaces connected to network segments of receiver hosts. The configurations on other switches are similar to the configuration on SwitchC, and are not mentioned here.

    [~SwitchC] multicast routing-enable
[*SwitchC] interface vlanif 104
[*SwitchC-Vlanif104] pim sm
[*SwitchC-Vlanif104] igmp enable
[*SwitchC-Vlanif104] quit
[*SwitchC] interface vlanif 101
[*SwitchC-Vlanif101] pim sm
[*SwitchC-Vlanif101] quit
[*SwitchC] interface vlanif 100
[*SwitchC-Vlanif100] pim sm
[*SwitchC-Vlanif100] quit
[*SwitchC] commit

  3. Configure Loopback1 interfaces, Loopback10 interfaces, C-BSRs, and C-RPs.

    # Configure Loopback1 addresses and the same Loopback10 address for SwitchC and SwitchD. Configure C-BSRs on Loopback1 interfaces and C-RPs on Loopback10 interfaces. The configuration on SwitchD is similar to the configuration on SwitchC, and is not mentioned here.

    [~SwitchC] interface loopback 1
[*SwitchC-LoopBack1] ip address 10.3.3.3 255.255.255.255
[*SwitchC-LoopBack1] pim sm
[*SwitchC-LoopBack1] quit
[*SwitchC] interface loopback 10
[*SwitchC-LoopBack10] ip address 10.1.1.1 255.255.255.255
[*SwitchC-LoopBack10] pim sm
[*SwitchC-LoopBack10] quit
[*SwitchC] pim
[*SwitchC-pim] c-bsr loopback 1
[*SwitchC-pim] c-rp loopback 10
[*SwitchC-pim] quit
[*SwitchC] commit

  4. Configure MSDP peers on Loopback0 interfaces.

    # Configure an MSDP peer on Loopback0 of SwitchC.

    [~SwitchC] interface loopback 0
[*SwitchC-LoopBack0] ip address 10.5.5.5 255.255.255.255
[*SwitchC-LoopBack0] pim sm
[*SwitchC-LoopBack0] quit
[*SwitchC] msdp
[*SwitchC-msdp] originating-rp loopback0
[*SwitchC-msdp] peer 10.2.2.2 connect-interface loopback0
[*SwitchC-msdp] quit
[*SwitchC] commit

    # Configure an MSDP peer on Loopback0 of SwitchD.

    [~SwitchD] interface loopback 0
[*SwitchD-LoopBack0] ip address 10.2.2.2 255.255.255.255
[*SwitchD-LoopBack0] pim sm
[*SwitchD-LoopBack0] quit
[*SwitchD] msdp
[*SwitchD-msdp] originating-rp loopback0
[*SwitchD-msdp] peer 10.5.5.5 connect-interface loopback0
[*SwitchD-msdp] quit
[*SwitchD] commit

Verifying the Configuration

# Run the display msdp brief command to view the status of the MSDP peers on switches. The following output shows summary information about MSDP peers on SwitchC and SwitchD:

[~SwitchC] 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                                                   
  10.2.2.2               Up     00:10:17        ?(unknown)         0             0                                                   


[~SwitchD] 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                                                   
  10.5.5.5               Up     00:10:18        ?(unknown)         0             0

# Run the display pim routing-table command to view the PIM routing table on a switch. When S1 (10.110.5.100/24) in the PIM-SM domain sends multicast data to G (225.1.1.1), User1 (Receiver) joins G and receives the multicast data sent to G. Comparing information about the PIM routing tables on SwitchC and SwitchD, you can find that SwitchC is the valid RP. S1 registers to SwitchC, and User1 sends a Join message to SwitchC.

[~SwitchC] display pim routing-table
VPN-Instance: public net
 Total 1 (*, G) entry; 1 (S, G) entry
 
 (*, 225.1.1.1)
     RP: 10.1.1.1 (local)
     Protocol: pim-sm, Flag: WC
     UpTime: 00:08:49
     Upstream interface: Register
         Upstream neighbor: NULL
         RPF prime neighbor: NULL
     Downstream interface(s) information:
     Total number of downstreams: 1
         1: Vlanif104
             Protocol: igmp, UpTime: 00:08:49, Expires: -
 
 (10.110.5.1, 225.1.1.1)
     RP: 10.1.1.1 (local)
     Protocol: pim-sm, Flag: SPT 2MSDP ACT
     UpTime: 00:07:26
     Upstream interface: Vlanif101
         Upstream neighbor: 10.110.1.2
         RPF prime neighbor: 10.110.1.2
     Downstream interface(s) information:
     Total number of downstreams: 1
         1: Vlanif104
             Protocol: pim-sm, UpTime: 00:07:26, Expires: -


[~SwitchD] display pim routing-table

Not output is displayed.

# User1 exits from G, and S1 stops sending multicast data to G. You can run the reset pim routing-table command to clear PIM routing entries on SwitchC.

[~SwitchC] quit
<SwitchC> reset pim routing-table group 225.1.1.1 mask 255.255.255.255 source 10.110.5.100 interface vlanif 104

# User2 joins G, and S2 (10.110.6.100/24) sends multicast dat to G. Comparing information about the PIM routing tables on SwitchC and SwitchD, you can find that SwitchD is the valid RP. S2 registers to SwitchD, and User2 sends a Join message to SwitchD.

<SwitchC> display pim routing-table

Not output is displayed.

[~SwitchD] display pim routing-table
VPN-Instance: public net  
Total 1 (*, G) entry; 1 (S, G) entry
 
(*, 225.1.1.1)
     RP: 10.1.1.1 (local)
     Protocol: pim-sm, Flag: WC
     UpTime: 00:07:23
     Upstream interface: Register 
         Upstream neighbor: NULL
         RPF prime neighbor: NULL
     Downstream interface(s) information:
     Total number of downstreams: 1
         1: Vlanif103,
             Protocol: igmp, UpTime: 00:07:23, Expires:-

 (10.110.6.100, 225.1.1.1)
     RP: 10.1.1.1 (local)
     Protocol: pim-sm, Flag: SPT 2MSDP ACT
     UpTime: 00:05:20
     Upstream interface: Vlanif102
         Upstream neighbor: 10.110.2.2
         RPF prime neighbor: 10.110.2.2
     Downstream interface(s) information:
     Total number of downstreams: 1
         1: Vlanif103
             Protocol: pim-sm, UpTime: 00:05:20, Expires: -

Configuration Files

  • SwitchA configuration file

    #
sysname SwitchA
#
vlan batch 101 105
#
multicast routing-enable
#
interface Vlanif101
 ip address 10.110.1.2 255.255.255.0
 pim sm
#
interface Vlanif105
 ip address 10.110.5.1 255.255.255.0
 pim sm
#
interface 10GE1/0/1
 port default vlan 105
#
interface 10GE2/0/2
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 101
#
ospf 1
 area 0.0.0.0
  network 10.110.1.0 0.0.0.255
  network 10.110.5.0 0.0.0.255
#
return

  • SwitchB configuration file

    #
sysname SwitchB
#
vlan batch 102 106
#
multicast routing-enable
#
interface Vlanif102
 ip address 10.110.2.2 255.255.255.0
 pim sm
#
interface Vlanif106
 ip address 10.110.6.1 255.255.255.0
 pim sm
#
interface 10GE1/0/1
 port default vlan 106
#
interface 10GE2/0/2
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 102
#
ospf 1
 area 0.0.0.0
  network 10.110.2.0 0.0.0.255
  network 10.110.6.0 0.0.0.255
#
return

  • SwitchC configuration file

    #
sysname SwitchC
#
vlan batch 100 to 101 104
#
multicast routing-enable
#
interface Vlanif100
 ip address 192.168.1.1 255.255.255.0
 pim sm
#
interface Vlanif101
 ip address 10.110.1.1 255.255.255.0
 pim sm
#
interface Vlanif104
 ip address 10.110.4.1 255.255.255.0
 pim sm
 igmp enable
#
interface 10GE1/0/1
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 100
#
interface 10GE2/0/2
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 101
#
interface 10GE3/0/3
 port default vlan 104
#
interface LoopBack0
 ip address 10.5.5.5 255.255.255.255
 pim sm
#
interface LoopBack1
 ip address 10.3.3.3 255.255.255.255
 pim sm
#
interface LoopBack10
 ip address 10.1.1.1 255.255.255.255
 pim sm
#
ospf 1
 area 0.0.0.0
  network 10.5.5.5 0.0.0.0
  network 10.3.3.3 0.0.0.0
  network 10.1.1.1 0.0.0.0
  network 10.110.1.0 0.0.0.255
  network 10.110.4.0 0.0.0.255
  network 192.168.1.0 0.0.0.255
#
pim
 c-bsr LoopBack1
 c-rp LoopBack10
#
msdp
 originating-rp LoopBack0
 peer 10.2.2.2 connect-interface LoopBack0
#
return

  • SwitchD configuration file

    #
sysname SwitchD
#
vlan batch 102 to 103 300
#
multicast routing-enable
#
interface Vlanif102
 ip address 10.110.2.1 255.255.255.0
 pim sm
#
interface Vlanif103
 ip address 10.110.3.1 255.255.255.0
 pim sm
#
interface Vlanif300
 ip address 192.168.3.1 255.255.255.0
 pim sm
 igmp enable
#
interface 10GE1/0/1
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 300
#
interface 10GE2/0/2
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 102
#
interface 10GE3/0/3
 port default vlan 103
#
interface LoopBack0
 ip address 10.2.2.2 255.255.255.255
 pim sm
#
interface LoopBack1
 ip address 10.4.4.4 255.255.255.255
 pim sm
#
interface LoopBack10
 ip address 10.1.1.1 255.255.255.255
 pim sm
#
ospf 1
 area 0.0.0.0
  network 10.2.2.2 0.0.0.0
  network 10.4.4.4 0.0.0.0
  network 10.1.1.1 0.0.0.0
  network 10.110.2.0 0.0.0.255
  network 10.110.3.0 0.0.0.255
  network 192.168.3.0 0.0.0.255
#
pim
 c-bsr LoopBack1
 c-rp LoopBack10
#
msdp
 originating-rp LoopBack0
 peer 10.5.5.5 connect-interface LoopBack0
#
return

  • SwitchE configuration file

    #
sysname SwitchE
#
vlan batch 100 300
#
multicast routing-enable
#
interface Vlanif100
 ip address 192.168.1.2 255.255.255.0
 pim sm
#
interface Vlanif300
 ip address 192.168.3.2 255.255.255.0
 pim sm
#
interface 10GE1/0/1
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 300
#
interface 10GE2/0/2
 port link-type trunk
 undo port trunk allow-pass vlan 1
 port trunk allow-pass vlan 100
#
ospf 1
 area 0.0.0.0
  network 192.168.1.0 0.0.0.255
  network 192.168.3.0 0.0.0.255
#
return
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Updated: 2020-12-24

Document ID: EDOC1000039339

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