Example: Configuring PIM-SM inter-domain multicast
Network configuration
As shown in Figure 64:
OSPF runs within AS 100 and AS 200 and BGP runs between them.
Each PIM-SM domain has a minimum of one multicast source or receiver.
Set up MSDP peering relationships between the RPs in the PIM-SM domains to share multicast source information among the PIM-SM domains.
Figure 64: Network diagram
Table 14: Interface and IP address assignment
Device | Interface | IP address | Device | Interface | IP address |
|---|---|---|---|---|---|
Switch A | Vlan-int103 | 10.110.1.2/24 | Switch D | Vlan-int104 | 10.110.4.2/24 |
Switch A | Vlan-int100 | 10.110.2.1/24 | Switch D | Vlan-int300 | 10.110.5.1/24 |
Switch A | Vlan-int200 | 10.110.3.1/24 | Switch E | Vlan-int105 | 10.110.6.1/24 |
Switch B | Vlan-int103 | 10.110.1.1/24 | Switch E | Vlan-int102 | 192.168.3.2/24 |
Switch B | Vlan-int101 | 192.168.1.1/24 | Switch E | Loop0 | 3.3.3.3/32 |
Switch B | Loop0 | 1.1.1.1/32 | Switch F | Vlan-int105 | 10.110.6.2/24 |
Switch C | Vlan-int104 | 10.110.4.1/24 | Switch F | Vlan-int400 | 10.110.7.1/24 |
Switch C | Vlan-int102 | 192.168.3.1/24 | Source 1 | — | 10.110.2.100/24 |
Switch C | Vlan-int101 | 192.168.1.2/24 | Source 2 | — | 10.110.5.100/24 |
Switch C | Loop0 | 2.2.2.2/32 | Switch D | Vlan-int104 | 10.110.4.2/24 |
Procedure
Assign an IP address and subnet mask to each interface, as shown in Figure 64. (Details not shown.)
Configure OSPF on the switches in the ASs. (Details not shown.)
Enable IP multicast routing and PIM-SM, and configure PIM-SM domain borders:
# On Switch A, enable IP multicast routing.
<SwitchA> system-view [SwitchA] multicast routing [SwitchA-mrib] quit
# Enable PIM-SM on VLAN-interface 103 and VLAN-interface 100.
[SwitchA] interface vlan-interface 103 [SwitchA-Vlan-interface103] pim sm [SwitchA-Vlan-interface103] quit [SwitchA] interface vlan-interface 100 [SwitchA-Vlan-interface100] pim sm [SwitchA-Vlan-interface100] quit
# Enable IGMP on the receiver-side interface (VLAN-interface 200).
[SwitchA] interface vlan-interface 200 [SwitchA-Vlan-interface200] igmp enable [SwitchA-Vlan-interface200] quit
# Enable IP multicast routing and PIM-SM on Switch B, Switch C, Switch D, Switch E, and Switch F in the same way Switch A is configured. (Details not shown.)
# Configure a PIM domain border on Switch B.
[SwitchB] interface vlan-interface 101 [SwitchB-Vlan-interface101] pim bsr-boundary [SwitchB-Vlan-interface101] quit
# Configure a PIM domain border on Switch C and Switch E in the same way Switch B is configured. (Details not shown.)
Configure C-BSRs and C-RPs:
# Configure Loopback 0 as a C-BSR and a C-RP on Switch B.
[SwitchB] pim [SwitchB-pim] c-bsr 1.1.1.1 [SwitchB-pim] c-rp 1.1.1.1 [SwitchB-pim] quit
# Configure C-BSRs and C-RPs on Switch C and Switch E in the same way Switch B is configured. (Details not shown.)
Configure BGP for mutual route redistribution between BGP and OSPF:
# On Switch B, configure an EBGP peer, and redistribute OSPF routes.
[SwitchB] bgp 100 [SwitchB-bgp] router-id 1.1.1.1 [SwitchB-bgp] peer 192.168.1.2 as-number 200 [SwitchB-bgp] address-family ipv4 unicast [SwitchB-bgp-ipv4] import-route ospf 1 [SwitchB-bgp-ipv4] peer 192.168.1.2 enable [SwitchB-bgp-ipv4] quit
# On Switch C, configure an EBGP peer, and redistribute OSPF routes.
[SwitchC] bgp 200 [SwitchC-bgp] router-id 2.2.2.2 [SwitchC-bgp] peer 192.168.1.1 as-number 100 [SwitchC-bgp] address-family ipv4 unicast [SwitchC-bgp-ipv4] import-route ospf 1 [SwitchC-bgp-ipv4] peer 192.168.1.1 enable [SwitchC-bgp-ipv4] quit
# Redistribute BGP routes into OSPF on Switch B.
[SwitchB] ospf 1 [SwitchB-ospf-1] import-route bgp [SwitchB-ospf-1] quit
# Redistribute BGP routes into OSPF on Switch C.
[SwitchB] ospf 1 [SwitchB-ospf-1] import-route bgp [SwitchB-ospf-1] quit
Configure MSDP peers:
# Configure an MSDP peer on Switch B.
[SwitchB] msdp [SwitchB-msdp] peer 192.168.1.2 connect-interface vlan-interface 101 [SwitchB-msdp] quit
# Configure an MSDP peer on Switch C.
[SwitchC] msdp [SwitchC-msdp] peer 192.168.1.1 connect-interface vlan-interface 101 [SwitchC-msdp] peer 192.168.3.2 connect-interface vlan-interface 102 [SwitchC-msdp] quit
# Configure MSDP peers on Switch E.
[SwitchE] msdp [SwitchE-msdp] peer 192.168.3.1 connect-interface vlan-interface 102 [SwitchE-msdp] quit
Verifying the configuration
# Display information about BGP peer groups on Switch B.
[SwitchB] display bgp peer ipv4 BGP local router ID: 1.1.1.1 Local AS number: 100 Total number of peers: 1 Peers in established state: 1 Peer AS MsgRcvd MsgSent OutQ PrefRcv Up/Down State 192.168.1.2 200 24 21 0 6 00:20:07 Established
# Display information about BGP peer groups on Switch C.
[SwitchC] display bgp peer ipv4 BGP local router ID: 2.2.2.2 Local AS number: 1 Total number of peers: 1 Peers in established state: 1 Peer AS MsgRcvd MsgSent OutQ PrefRcv Up/Down State 192.168.1.1 100 18 16 0 1 00:20:07 Established
# Display the BGP routing table on Switch C.
[SwitchC] display bgp routing-table ipv4
Total number of routes: 5
BGP local router ID is 2.2.2.2
Status codes: * - valid, > - best, d - dampened, h - history,
s - suppressed, S - stale, i - internal, e - external
Network NextHop MED LocPrf PrefVal Path/Ogn
* > 1.1.1.1/32 192.168.1.1 0 0 100?
* >i 2.2.2.2/32 0.0.0.0 0 0 ?
* > 192.168.1.0 0.0.0.0 0 0 ?
* > 192.168.1.1/32 0.0.0.0 0 0 ?
* > 192.168.1.2/32 0.0.0.0 0 0 ?
# Verify that hosts in PIM-SM 1 and PIM-SM 3 can receive the multicast data from Source 1 in PIM-SM 1 and Source 2 in PIM-SM 2. (Details not shown.)
# Display brief information about MSDP peer groups 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 192.168.1.2 Established 00:12:57 200 13 0
# Display brief information about MSDP peer groups on Switch C.
[SwitchC] 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 192.168.3.2 Established 01:43:57 ? 8 0 192.168.1.1 Established 01:43:57 ? 13 0
# Display brief information about MSDP peer groups on Switch E.
[SwitchE] 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 192.168.3.1 Established 01:07:57 200 8 0
# Display detailed MSDP peer information on Switch B.
[SwitchB] display msdp peer-status MSDP Peer 192.168.1.2; AS 200 Description: Information about connection status: State: Established Up/down time: 00:15:47 Resets: 0 Connection interface: Vlan-interface101 (192.168.1.1) Received/sent messages: 16/16 Discarded input messages: 0 Discarded output messages: 0 Elapsed time since last connection or counters clear: 00:17:40 Mesh group peer joined: momo Last disconnect reason: Hold timer expired with truncated message Truncated packet: 5 bytes in buffer, type: 1, length: 20, without packet time: 75s Information about (Source, Group)-based SA filtering policy: Import policy: None Export policy: None Information about SA-Requests: Policy to accept SA-Requests: None Sending SA-Requests status: Disable Minimum TTL to forward SA with encapsulated data: 0 SAs learned from this peer: 0, SA cache maximum for the peer: 4294967295 Input queue size: 0, Output queue size: 0 Counters for MSDP messages: RPF check failure: 0 Incoming/outgoing SA: 0/0 Incoming/outgoing SA-Request: 0/0 Incoming/outgoing SA-Response: 0/0 Incoming/outgoing Keepalive: 867/867 Incoming/outgoing Notification: 0/0 Incoming/outgoing Traceroutes in progress: 0/0 Incoming/outgoing Traceroute reply: 0/0 Incoming/outgoing Unknown: 0/0 Incoming/outgoing data packet: 0/0