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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)
Dec 05, 2019
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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 all the VLAN interfaces as multicast interface, enable PIM-SM on all interfaces and enable IGMP on the interface that connects to the Receiver.
- Configure C-BSR and C-RPs on loopback interface.
- Configure the SPT switching condition to the multicast packets reached 120000 bytes in 10s.
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 vlan-interface loopback address 1.1.1.1 prefix-length 32 admin@XorPlus# set vlan-interface interface vlan20 vif vlan20 address 20.0.0.1 prefix-length 24 admin@XorPlus# set vlan-interface interface vlan60 vif vlan60 address 60.0.0.1 prefix-length 24 admin@XorPlus# set vlan-interface interface vlan100 vif vlan100 address 100.0.0.1 prefix-length 24
Step2 Enable IP routing.
admin@Xorplus# set ip routing enable true
Step3 Enable the VLAN interfaces as multicast interface.
admin@XorPlus# set multicast-interface interface vlan20 vif vlan20 disable false admin@XorPlus# set multicast-interface interface vlan60 vif vlan60 disable false admin@XorPlus# set multicast-interface interface vlan100 vif vlan100 disable false
Step4 Enable IGMP on the L3 VLAN interfaces of the PIM router connected to the receiver.
admin@XorPlus# set protocols igmp interface vlan100 vif vlan100
Step5 Enable PIM-SM on the L3 VLAN interfaces.
admin@XorPlus# set protocols pimsm4 interface vlan20 vif vlan20 disable false admin@XorPlus# set protocols pimsm4 interface vlan60 vif vlan60 disable false admin@XorPlus# set protocols pimsm4 interface vlan100 vif vlan100 disable false admin@XorPlus# set protocols pimsm4 interface loopback vif loopback disable false
Step6 Configure OSPF routes to other switches.
admin@XorPlus# set protocols ospf4 router-id 1.1.1.1 admin@XorPlus# set protocols ospf4 traceoptions flag all disable false admin@XorPlus# set protocols ospf4 area 0.0.0.0 loopback address 1.1.1.1 admin@XorPlus# set protocols ospf4 area 0.0.0.0 interface vlan20 vif vlan20 address 20.0.0.1 admin@XorPlus# set protocols ospf4 area 0.0.0.0 interface vlan60 vif vlan60 address 60.0.0.1 admin@XorPlus# set protocols ospf4 area 0.0.0.0 interface vlan100 vif vlan100 address 100.0.0.1
Step7 Configure C-BSR on loopback interface for scope zone 224.0.0.0/4.
admin@XorPlus# set protocols pimsm4 bootstrap cand-bsr scope-zone 224.0.0.0/4 cand-bsr-by-vif-name loopback
Step8 Configure the SPT switching condition to the multicast packets reached 120000 bytes in 10s.
admin@Xorplus# set protocols pimsm4 switch-to-spt-threshold interval 10 admin@Xorplus# set protocols pimsm4 switch-to-spt-threshold bytes 120000
Step9 Commit the configuration.
admin@Xorplus# commit
Step10 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 mfc command to show information about PIM multicast forwarding entries.
admin@Xorplus# commit
admin@Xorplus# run show pim mfc
Group Source RP
------------- ------------- -------------
225.0.0.1 200.0.0.2 2.2.2.2
Incoming interface : vlan20
Outgoing interfaces: vlan100
225.0.0.1 200.0.0.3 2.2.2.2
Incoming interface : vlan60
Outgoing interfaces: vlan100
- Run run show pim mrib command to show information about the Multicast Routing Information Base (MRIB) that is used by PIM.
admin@Xorplus# run show pim mrib DestPrefix NextHopRouter VifName VifIndex MetricPref Metric ---------------- ------------- ------- -------- ---------- ------ 1.1.1.1/32 1.1.1.1 loopback 0 0 0 2.2.2.2/32 20.0.0.2 vlan20 1 110 1 3.3.3.3/32 60.0.0.3 vlan60 2 110 1 20.0.0.0/24 20.0.0.1 vlan20 1 0 0 30.0.0.0/24 60.0.0.3 vlan60 2 110 2 60.0.0.0/24 60.0.0.1 vlan60 2 0 0 100.0.0.0/24 100.0.0.1 vlan100 3 0 0 200.0.0.0/24 60.0.0.3 vlan60 2 110 2
- Run run show pim rps and run show pim rps mapping commands to show information about the RPs and the group-to-RP mapping.
admin@Xorplus# run show pim rps Group RP Type Pri Holdtime Timeout ------------- ------------- ------- --- -------- ------- 225.0.0.1 2.2.2.2 bootstrap 192 150 90 admin@Xorplus# run show pim rps mapping RP Type Pri Holdtime Timeout ActiveGroups GroupPrefix ------------- ------- --- -------- ------- ------------ ---------------- 2.2.2.2 bootstrap 192 150 136 1 225.0.0.0/8 2.2.2.2 bootstrap 192 150 136 0 239.0.0.0/8
- 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 vlan-interface loopback address 2.2.2.2 prefix-length 32 admin@XorPlus# set vlan-interface interface vlan20 vif vlan20 address 20.0.0.2 prefix-length 24 admin@XorPlus# set vlan-interface interface vlan30 vif vlan30 address 30.0.0.2 prefix-length 24
Step2 Enable IP routing.
admin@Xorplus# set ip routing enable true
Step3 Enable the VLAN interfaces as multicast interface.
admin@XorPlus# set multicast-interface interface vlan20 vif vlan20 disable false admin@XorPlus# set multicast-interface interface vlan30 vif vlan30 disable false
Step4 Enable PIM-SM on the L3 VLAN interfaces.
admin@XorPlus# set protocols pimsm4 interface vlan20 vif vlan20 disable false admin@XorPlus# set protocols pimsm4 interface vlan30 vif vlan30 disable false admin@XorPlus# set protocols pimsm4 interface loopback vif loopback disable false
Step5 Configure OSPF routes to other switches.
admin@XorPlus# set protocols ospf4 router-id 2.2.2.2 admin@XorPlus# set protocols ospf4 traceoptions flag all disable false admin@XorPlus# set protocols ospf4 area 0.0.0.0 loopback address 2.2.2.2 admin@XorPlus# set protocols ospf4 area 0.0.0.0 interface vlan20 vif vlan20 address 20.0.0.2 admin@XorPlus# set protocols ospf4 area 0.0.0.0 interface vlan30 vif vlan30 address 30.0.0.2
Step6 Configure C-BSR on loopback interface for scope zone 224.0.0.0/4.
admin@XorPlus# set protocols pimsm4 bootstrap cand-bsr scope-zone 224.0.0.0/4 cand-bsr-by-vif-name loopback admin@XorPlus# set protocols pimsm4 bootstrap cand-rp group-prefix 225.0.0.0/8 cand-rp-by-vif-name loopback admin@XorPlus# set protocols pimsm4 bootstrap cand-rp group-prefix 239.0.0.0/8 cand-rp-by-vif-name loopback
Step7 Commit the configuration.
admin@Xorplus# commit
Step8 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
- Run run show pim mfc command to show information about PIM multicast forwarding entries.
admin@Xorplus# run show pim mfc Group Source RP ------------- ------------- ------------- 225.0.0.1 200.0.0.2 2.2.2.2 Incoming interface : vlan30 Outgoing interfaces: vlan20 225.0.0.1 200.0.0.3 2.2.2.2 Incoming interface : register_vif Outgoing interfaces: None
- Run run show pim mrib command to show information about the Multicast Routing Information Base (MRIB) that is used by PIM.
admin@Xorplus# run show pim mrib DestPrefix NextHopRouter VifName VifIndex MetricPref Metric ---------------- ------------- ------- -------- ---------- ------ 1.1.1.1/32 20.0.0.1 vlan20 1 110 1 2.2.2.2/32 2.2.2.2 loopback 0 0 0 3.3.3.3/32 30.0.0.3 vlan30 2 110 1 20.0.0.0/24 20.0.0.2 vlan20 1 0 0 30.0.0.0/24 30.0.0.2 vlan30 2 0 0 60.0.0.0/24 20.0.0.1 vlan20 1 110 2 100.0.0.0/24 20.0.0.1 vlan20 1 110 2 150.0.0.0/24 20.0.0.3 vlan20 1 1 1 200.0.0.0/24 30.0.0.3 vlan30 2 110 2
- Run run show pim rps and run show pim rps mapping commands to show information about the RPs and the group-to-RP mapping.
admin@Xorplus# run show pim rps Group RP Type Pri Holdtime Timeout ------------- ------------- ------- --- -------- ------- 225.0.0.1 2.2.2.2 bootstrap 192 150 91 admin@Xorplus# run show pim rps mapping RP Type Pri Holdtime Timeout ActiveGroups GroupPrefix ------------ ------- --- -------- ------- ------------ ---------------- 2.2.2.2 bootstrap 192 150 145 1 225.0.0.0/8 2.2.2.2 bootstrap 192 150 145 0 239.0.0.0/8
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 vlan-interface loopback address 3.3.3.3 prefix-length 32 admin@XorPlus# set vlan-interface interface vlan30 vif vlan30 address 30.0.0.3 prefix-length 24 admin@XorPlus# set vlan-interface interface vlan60 vif vlan60 address 60.0.0.3 prefix-length 24 admin@XorPlus# set vlan-interface interface vlan200 vif vlan200 address 200.0.0.1 prefix-length 24
Step2 Enable IP routing.
admin@Xorplus# set ip routing enable true
Step3 Enable the VLAN interfaces as multicast interface.
admin@XorPlus# set multicast-interface interface vlan30 vif vlan30 disable false admin@XorPlus# set multicast-interface interface vlan60 vif vlan60 disable false admin@XorPlus# set multicast-interface interface vlan200 vif vlan200 disable false
Step4 Enable PIM-SM on the L3 VLAN interfaces.
admin@XorPlus# set protocols pimsm4 interface vlan30 vif vlan30 disable false admin@XorPlus# set protocols pimsm4 interface vlan60 vif vlan60 disable false admin@XorPlus# set protocols pimsm4 interface vlan200 vif vlan200 disable false admin@XorPlus# set protocols pimsm4 interface loopback vif loopback disable false
Step5 Configure OSPF routes to other switches.
admin@XorPlus# set protocols ospf4 router-id 3.3.3.3 admin@XorPlus# set protocols ospf4 traceoptions flag all disable false admin@XorPlus# set protocols ospf4 area 0.0.0.0 loopback address 3.3.3.3 admin@XorPlus# set protocols ospf4 area 0.0.0.0 interface vlan20 vif vlan20 address 30.0.0.3 admin@XorPlus# set protocols ospf4 area 0.0.0.0 interface vlan60 vif vlan60 address 60.0.0.3 admin@XorPlus# set protocols ospf4 area 0.0.0.0 interface vlan100 vif vlan100 address 200.0.0.1
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 ---------- -------- ------ - -------- -------- --------------- --------- 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 mfc command to show information about PIM multicast forwarding entries.
admin@Xorplus# run show pim mfc Group Source RP ------------- ------------- ------------- 225.0.0.1 200.0.0.2 2.2.2.2 Incoming interface : vlan200 Outgoing interfaces: vlan30 225.0.0.1 200.0.0.3 2.2.2.2 Incoming interface : vlan200 Outgoing interfaces: vlan60
- Run run show pim mrib command to show information about the Multicast Routing Information Base (MRIB) that is used by PIM.
admin@Xorplus# run show pim mrib DestPrefix NextHopRouter VifName VifIndex MetricPref Metric ---------------- ------------- ------- -------- ---------- ------ 1.1.1.1/32 60.0.0.1 vlan60 2 110 1 2.2.2.2/32 30.0.0.2 vlan30 1 110 1 3.3.3.3/32 3.3.3.3 loopback 0 0 0 20.0.0.0/24 60.0.0.1 vlan60 2 110 2 30.0.0.0/24 30.0.0.3 vlan30 1 0 0 60.0.0.0/24 60.0.0.3 vlan60 2 0 0 100.0.0.0/24 60.0.0.1 vlan60 2 110 2 150.0.0.0/24 0.0.0.0 vlan200 3 1 1 200.0.0.0/24 200.0.0.1 vlan200 3 0 0
- Run run show pim rps and run show pim rps mapping commands to show information about the RPs and the group-to-RP mapping.
admin@Xorplus# run show pim rps Group RP Type Pri Holdtime Timeout ------------ ------------- ------- --- -------- ------- 225.0.0.1 2.2.2.2 bootstrap 192 150 102 225.0.0.1 2.2.2.2 bootstrap 192 150 102 admin@Xorplus# run show pim rps mapping RP Type Pri Holdtime Timeout ActiveGroups GroupPrefix ------------- ------- --- -------- ------- ------------ ---------------- 2.2.2.2 bootstrap 192 150 98 0 225.0.0.0/8 2.2.2.2 bootstrap 192 150 98 0 239.0.0.0/8
- 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
- Run run show pim traffic command to show the traffic statistic information about the multicast group.
admin@Xorplus# run show pim traffic PIM Traffic Counters Received Sent Hello 172 118 Join-Prune 27 30 Graft 0 0 Graft Ack. 0 0 Data Register 0 0 Register Stop 0 0 Assert 2 10 BSR Message 0 0 Candidate-RP Adv. 0 0 Errors: Malformed Packets 0 Bad Checksums 0 Packets received on PIM-disabled Interface 0 Packets received with Unknown PIM Version 0 Packets received with Unknown PIM Type 0 Packets received from Unknown PIM Neighbor 1
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