Example: Configuring Anycast RP
Network configuration
As shown in Figure 66, OSPF runs within the domain to provide unicast routes.
Configure the Anycast RP application so that the receiver-side DRs and the source-side DRs can initiate a join process to their respective RPs that are topologically closest to them.
Configure the router IDs of Switch B and Switch D as 1.1.1.1 and 2.2.2.2, respectively. Set up an MSDP peering relationship between Switch B and Switch D.
Figure 66: Network diagram
Table 16: Interface and IP address assignment
Device | Interface | IP address | Device | Interface | IP address |
|---|---|---|---|---|---|
Source 1 | — | 10.110.5.100/24 | Switch C | Vlan-int101 | 192.168.1.2/24 |
Source 2 | — | 10.110.6.100/24 | Switch C | Vlan-int102 | 192.168.2.2/24 |
Switch A | Vlan-int300 | 10.110.5.1/24 | Switch D | Vlan-int200 | 10.110.3.1/24 |
Switch A | Vlan-int103 | 10.110.2.2/24 | Switch D | Vlan-int104 | 10.110.4.1/24 |
Switch B | Vlan-int100 | 10.110.1.1/24 | Switch D | Vlan-int102 | 192.168.2.1/24 |
Switch B | Vlan-int103 | 10.110.2.1/24 | Switch D | Loop0 | 2.2.2.2/32 |
Switch B | Vlan-int101 | 192.168.1.1/24 | Switch D | Loop10 | 4.4.4.4/32 |
Switch B | Loop0 | 1.1.1.1/32 | Switch D | Loop20 | 10.1.1.1/32 |
Switch B | Loop10 | 3.3.3.3/32 | Switch E | Vlan-int400 | 10.110.6.1/24 |
Switch B | Loop20 | 10.1.1.1/32 | Switch E | Vlan-int104 | 10.110.4.2/24 |
Procedure
Assign an IP address and subnet mask to each interface, as shown in Figure 66. (Details not shown.)
Configure OSPF on the switches. (Details not shown.)
Enable IP multicast routing, IGMP, and PIM-SM:
# On Switch B, enable IP multicast routing.
<SwitchB> system-view [SwitchB] multicast routing [SwitchB-mrib] quit
# Enable IGMP on the receiver-side interface (VLAN-interface 100).
[SwitchB] interface vlan-interface 100 [SwitchB-Vlan-interface100] igmp enable [SwitchB-Vlan-interface100] quit
# Enable PIM-SM on the other interfaces.
[SwitchB] interface vlan-interface 103 [SwitchB-Vlan-interface103] pim sm [SwitchB-Vlan-interface103] quit [SwitchB] interface Vlan-interface 101 [SwitchB-Vlan-interface101] pim sm [SwitchB-Vlan-interface101] quit [SwitchB] interface loopback 0 [SwitchB-LoopBack0] pim sm [SwitchB-LoopBack0] quit [SwitchB] interface loopback 10 [SwitchB-LoopBack10] pim sm [SwitchB-LoopBack10] quit [SwitchB] interface loopback 20 [SwitchB-LoopBack20] pim sm [SwitchB-LoopBack20] quit
# Enable IP multicast routing, IGMP, and PIM-SM on Switch A, Switch C, Switch D, and Switch E in the same way Switch B is configured. (Details not shown.)
Configure C-BSRs and C-RPs:
# Configure Loopback 10 as a C-BSR and Loopback 20 as a C-RP on Switch B.
[SwitchB] pim [SwitchB-pim] c-bsr 3.3.3.3 [SwitchB-pim] c-rp 10.1.1.1 [SwitchB-pim] quit
# Configure a C-BSR and a C-RP on Switch D in the same way Switch B is configured. (Details not shown.)
Configure MSDP peers:
# Configure an MSDP peer on Loopback 0 of Switch B.
[SwitchB] msdp [SwitchB-msdp] originating-rp loopback 0 [SwitchB-msdp] peer 2.2.2.2 connect-interface loopback 0 [SwitchB-msdp] quit
# Configure an MSDP peer on Loopback 0 of Switch D.
[SwitchD] msdp [SwitchD-msdp] originating-rp loopback 0 [SwitchD-msdp] peer 1.1.1.1 connect-interface loopback 0 [SwitchD-msdp] quit
Verifying the configuration
# Display brief information about MSDP peers on Switch B.
[SwitchB] display msdp brief Configured Established Listen Connect Shutdown Disabled 1 1 0 0 0 0 Peer address State Up/Down time AS SA count Reset count 2.2.2.2 Established 00:10:57 ? 0 0
# Display brief information about MSDP peers on Switch D.
[SwitchD] display msdp brief Configured Established Listen Connect Shutdown Disabled 1 1 0 0 0 0 Peer address State Up/Down time AS SA count Reset count 1.1.1.1 Established 00:10:57 ? 0 0
# Send an IGMP report from Host A to join multicast group 225.1.1.1. (Details not shown.)
# Send multicast data from Source 1 to multicast group 225.1.1.1. (Details not shown.)
# Display the PIM routing table on Switch D.
[SwitchD] display pim routing-table
No information is output on Switch D.
# Display the PIM routing table on Switch B.
[SwitchB] display pim routing-table
Total 1 (*, G) entry; 1 (S, G) entry
(*, 225.1.1.1)
RP: 10.1.1.1 (local)
Protocol: pim-sm, Flag: WC
UpTime: 00:15:04
Upstream interface: Register
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface100
Protocol: igmp, UpTime: 00:15:04, Expires: -
(10.110.5.100, 225.1.1.1)
RP: 10.1.1.1 (local)
Protocol: pim-sm, Flag: SPT 2MSDP ACT
UpTime: 00:46:28
Upstream interface: Vlan-interface103
Upstream neighbor: 10.110.2.2
RPF prime neighbor: 10.110.2.2
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface100
Protocol: pim-sm, UpTime: - , Expires: -
The output shows that Switch B now acts as the RP for Source 1 and Host A.
# Send an IGMP leave message from Host A to leave multicast group 225.1.1.1. (Details not shown.),
# Send an IGMP report from Host B to join multicast group 225.1.1.1. (Details not shown.)
# Send multicast data from Source 2 to multicast group 225.1.1.1. (Details not shown.)
# Display the PIM routing table on Switch B.
[SwitchB] display pim routing-table
No information is output on Switch B.
# Display the PIM routing table on Switch D.
[SwitchD] display pim routing-table
Total 1 (*, G) entry; 1 (S, G) entry
(*, 225.1.1.1)
RP: 10.1.1.1 (local)
Protocol: pim-sm, Flag: WC
UpTime: 00:12:07
Upstream interface: Register
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface200
Protocol: igmp, UpTime: 00:12:07, Expires: -
(10.110.6.100, 225.1.1.1)
RP: 10.1.1.1 (local)
Protocol: pim-sm, Flag: SPT 2MSDP ACT
UpTime: 00:40:22
Upstream interface: Vlan-interface104
Upstream neighbor: 10.110.4.2
RPF prime neighbor: 10.110.4.2
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface200
Protocol: pim-sm, UpTime: - , Expires: -
The output shows that Switch D now acts as the RP for Source 2 and Host B.