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Example for Configuring SPT Switchover in PIM-SM Domain
Example for Configuring SPT Switchover in PIM-SM Domain
- Tracy Yang (Unlicensed)
Owned by Tracy Yang (Unlicensed)
Networking Requirements
Receiver could receive the Video-on-Demand information in multicast mode. By default, when SPT switchover function is enabled, the receiver-side DR initiates SPT switchover to the source immediately after receiving the first multicast packet and find the best path to receive the multicast packets from the source. You can also use SPT switchover configuration to set the rate threshold of the multicast packets in a measurement interval to initiate SPT switchover.
As shown in Figure 1, it is required that the Receiver can receive multicast data properly through the path Source->SwitchC->SwitchB->SwitchA->Receiver. When the rate of multicast data reaches 120000 bytes within 10s, SwitchA performs SPT switchover after which the receiving path of Receiver changes to Source->SwitchC->SwitchA->Receiver.
Figure 1. SPT Switchover in PIM-SM Domain
Configuration Roadmap
Follow the roadmap below to configure SPT switchover in PIM-SM domain:
- Configure an IP address for each interface and a unicast routing protocol.
- Enable PIM-SM on all interfaces and enable IGMP on the interface that connects to the Receiver.
Procedure
SwitchA
Step1 Configure VLAN.
admin@XorPlus# set vlans vlan-id 20 l3-interface vlan20 admin@XorPlus# set vlans vlan-id 60 l3-interface vlan60 admin@XorPlus# set vlans vlan-id 100 l3-interface vlan100 admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 family ethernet-switching native-vlan-id 100 admin@XorPlus# set interface gigabit-ethernet ge-1/1/25 family ethernet-switching native-vlan-id 20 admin@XorPlus# set interface gigabit-ethernet ge-1/1/26 family ethernet-switching native-vlan-id 60 admin@XorPlus# set l3-interface loopback lo address 1.1.1.1 prefix-length 32 admin@XorPlus# set l3-interface vlan-interface vlan20 address 20.0.0.1 prefix-length 24 admin@XorPlus# set l3-interface vlan-interface vlan60 address 60.0.0.1 prefix-length 24 admin@XorPlus# set l3-interface vlan-interface vlan100 address 100.0.0.1 prefix-length 24
Step2 Enable IP routing.
admin@Xorplus# set ip routing enable true
Step3 Enable IGMP on the L3 VLAN interfaces of the PIM router connected to the receiver.
admin@XorPlus# set protocols igmp interface vlan100
Step4 Enable PIM-SM on the L3 VLAN interfaces.
admin@XorPlus# set protocols pim interface vlan20 admin@XorPlus# set protocols pim interface vlan60 admin@XorPlus# set protocols pim interface vlan100
Step5 Configure OSPF routes to other switches.
admin@XorPlus# set protocols ospf router-id 1.1.1.1 admin@XorPlus# set protocols ospf traceoption packet all admin@XorPlus# set protocols ospf interface lo area 0.0.0.0 admin@XorPlus# set protocols ospf interface vlan20 area 0.0.0.0 admin@XorPlus# set protocols ospf interface vlan60 area 0.0.0.0 admin@XorPlus# set protocols ospf interface vlan100 area 0.0.0.0
Step6 Commit the configuration.
admin@Xorplus# commit
Step7 Verify the configuration.
- Run run show pim interface command to show information about all interfaces on which PIM-SM is enabled.
admin@Xorplus# run show pim interface Interface State Mode V PIMstate Priority DRaddr Neighbors ---------- -------- ------ - -------- -------- --------------- --------- loopback UP Sparse 2 DR 1 1.1.1.1 0 vlan20 UP Sparse 2 NotDR 1 20.0.0.2 1 vlan60 UP Sparse 2 NotDR 1 60.0.0.3 1 vlan100 UP Sparse 2 DR 1 100.0.0.1 0
- Run run show pim neighbors command to show information about about PIM neighbors.
admin@Xorplus# run show pim neighbors Interface DRpriority NeighborAddr V Mode Holdtime Timeout ---------- ---------- ------------- - ---- -------- ------- vlan20 1 20.0.0.2 2 Sparse 105 84 vlan60 1 60.0.0.3 2 Sparse 105 83
- Run run show pim join command to show information about PIM multicast routing state.
admin@Xorplus# run show pim join Group Source RP Flags ------------ ------------- ------------- ----- 238.0.0.1 0.0.0.0 50.0.1.1 WC Upstream interface (RP): vlan20 Upstream MRIB next hop (RP): 20.0.1.2 Upstream RPF'(*,G): 20.0.1.3 Upstream state: Joined Join timer: 18 Local receiver include WC: vlan10 Joins RP: None Joins WC: None Join state: None Prune state: None Prune pending state: None I am assert winner state: None I am assert loser state: vlan20 Assert winner WC: None Assert lost WC: None Assert tracking WC: vlan10,vlan20 Could assert WC: vlan10 I am DR: vlan10,register_vif Immediate olist RP: None Immediate olist WC: vlan10 Inherited olist SG: vlan10 Inherited olist SG_RPT: vlan10 PIM include WC: vlan10
SwitchB
Step1 Configure VLAN.
admin@XorPlus# set vlans vlan-id 20 l3-interface vlan20 admin@XorPlus# set vlans vlan-id 30 l3-interface vlan30 admin@XorPlus# set interface gigabit-ethernet ge-1/1/49 family ethernet-switching native-vlan-id 20 admin@XorPlus# set interface gigabit-ethernet ge-1/1/50 family ethernet-switching native-vlan-id 30 admin@XorPlus# set l3-interface loopback lo address 2.2.2.2 prefix-length 32 admin@XorPlus# set l3-interface vlan-interface vlan20 address 20.0.0.2 prefix-length 24 admin@XorPlus# set l3-interface vlan-interface vlan30 address 30.0.0.2 prefix-length 24
Step2 Enable IP routing.
admin@Xorplus# set ip routing enable true
Step3 Enable PIM-SM on the L3 VLAN interfaces.
admin@XorPlus# set protocols pim interface vlan20 admin@XorPlus# set protocols pim interface vlan30
Step4 Configure OSPF routes to other switches.
admin@XorPlus# set protocols ospf router-id 2.2.2.2 admin@XorPlus# set protocols ospf traceoptions packet all detail admin@XorPlus# set protocols ospf interface lo area 0.0.0.0 admin@XorPlus# set protocols ospf interface vlan20 area 0.0.0.0 admin@XorPlus# set protocols ospf interface vlan30 area 0.0.0.0
Step5 Commit the configuration.
admin@Xorplus# commit
Step6 Verify the configuration.
- Run run show pim interface command to show information about all interfaces on which PIM-SM is enabled.
admin@Xorplus# run show pim interface Interface State Mode V PIMstate Priority DRaddr Neighbors ---------- -------- ------ - -------- -------- --------------- --------- loopback UP Sparse 2 DR 1 2.2.2.2 0 vlan20 UP Sparse 2 DR 1 20.0.0.2 1 vlan30 UP Sparse 2 NotDR 1 30.0.0.3 1
- Run run show pim neighbors command to show information about about PIM neighbors.
admin@Xorplus# run show pim neighbors Interface DRpriority NeighborAddr V Mode Holdtime Timeout ---------- ---------- ------------- - ---- -------- ------- vlan20 1 20.0.0.1 2 Sparse 105 84 vlan30 1 30.0.0.3 2 Sparse 105 81
SwitchC
Step1 Configure VLAN.
admin@XorPlus# set vlans vlan-id 30 l3-interface vlan30 admin@XorPlus# set vlans vlan-id 60 l3-interface vlan60 admin@XorPlus# set vlans vlan-id 200 l3-interface vlan200 admin@XorPlus# set interface gigabit-ethernet ge-1/1/3 family ethernet-switching native-vlan-id 200 admin@XorPlus# set interface gigabit-ethernet ge-1/1/25 family ethernet-switching native-vlan-id 30 admin@XorPlus# set interface gigabit-ethernet ge-1/1/26 family ethernet-switching native-vlan-id 60 admin@XorPlus# set l3-interface loopback lo address 3.3.3.3 prefix-length 32 admin@XorPlus# set l3-interface vlan-interface vlan30 address 30.0.0.3 prefix-length 24 admin@XorPlus# set l3-interface vlan-interface vlan60 address 60.0.0.3 prefix-length 24 admin@XorPlus# set l3-interface vlan-interface vlan200 address 200.0.0.1 prefix-length 24
Step2 Enable IP routing.
admin@Xorplus# set ip routing enable true
Step3 Enable PIM-SM on the L3 VLAN interfaces.
admin@XorPlus# set protocols pim interface vlan30 admin@XorPlus# set protocols pim interface vlan60 admin@XorPlus# set protocols pim interface vlan200
Step4 Configure OSPF routes to other switches.
admin@XorPlus# set protocols ospf router-id 3.3.3.3 admin@XorPlus# set protocols ospf traceoption packet all detail admin@XorPlus# set protocols ospf interface lo area 0.0.0.0 admin@XorPlus# set protocols ospf interface vlan20 area 0.0.0.0 admin@XorPlus# set protocols ospf interface vlan60 area 0.0.0.0 admin@XorPlus# set protocols ospf interface vlan100 area 0.0.0.0
Step5 Commit the configuration.
admin@Xorplus# commit
Step6 Verify the configuration.
- Run run show pim interface command to show information about all interfaces on which PIM-SM is enabled.
admin@Xorplus# run show pim interface Interface State Mode V PIMstate Priority DRaddr Neighbors ---------- -------- ------ - -------- -------- --------------- --------- vlan30 UP Sparse 2 DR 1 30.0.0.3 1 vlan60 UP Sparse 2 DR 1 60.0.0.3 1 vlan200 UP Sparse 2 DR 1 200.0.0.1 0
- Run run show pim neighbors command to show information about about PIM neighbors.
admin@Xorplus# run show pim neighbors Interface DRpriority NeighborAddr V Mode Holdtime Timeout ---------- ---------- ------------- - ---- -------- ------- vlan30 1 30.0.0.2 2 Sparse 105 87 vlan60 1 60.0.0.1 2 Sparse 105 93
- Run run show pim join command to show information about PIM multicast routing state.
admin@Xorplus# run show pim join Group Source RP Flags ------------- ------------- ------------- ----- 238.0.0.1 0.0.0.0 50.0.1.1 WC Upstream interface (RP): vlan40 Upstream MRIB next hop (RP): 40.0.1.2 Upstream RPF'(*,G): 40.0.1.2 Upstream state: Joined Join timer: 16 Local receiver include WC: vlan20 Joins RP: None Joins WC: vlan20 Join state: vlan20 Prune state: None Prune pending state: None I am assert winner state: vlan20 I am assert loser state: None Assert winner WC: vlan20 Assert lost WC: None Assert tracking WC: vlan20,vlan40 Could assert WC: vlan20 I am DR: vlan20,register_vif Immediate olist RP: None Immediate olist WC: vlan20 Inherited olist SG: vlan20 Inherited olist SG_RPT: vlan20 PIM include WC: vlan20
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