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Service Chaining Design and Implementation

date_range 27-Jan-23

For an overview of service chaining, see the Service Chaining section in Data Center Fabric Blueprint Architecture Components.

The following sections show how to implement service chaining and service chaining of multicast in a EVPN VXLAN network.

Service Chaining Design

Figure 1 shows a logical view of the service chaining configuration. It shows the configuration of one spine with a left and right side VRF configuration. The SRX Series router is the PNF, and is performing the Service chaining.

Figure 1: Service Chaining Logical View

The flow of traffic for the spine:

Traffic from the leaf tenants enters tenant VRF-151, and is destined to a network attached to tenant VRF-152.
Because there is no route from VRF-151 to VRF-152, a default route lookup is performed using routes received from the PNF.
After it receives the default route from the PNF, VRF-151 routes traffic toward the PNF via IRB.4088.
Traffic reaches the PNF, and the PNF performs the service chaining. Traffic is forwarded out ae26.1 using routes received from EBGP.
Traffic now reaches tenant VRF-152, and follows regular route lookup and forwarding action towards the leaf tenants.

Configuring Service Chaining

This section shows how to configure the spine for service chaining as shown in Figure 1. This configuration is based on the Centrally-Routed Bridging Overlay Design and Implementation configuration.

Configure the ESI connection towards the PNF.

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set interfaces xe-0/0/67:0 gigether-options 802.3ad ae26
set interfaces ae26 esi 00:88:88:88:88:88:88:88:88:88
set interfaces ae26 esi all-active
set interfaces ae26 aggregated-ether-options lacp active
set interfaces ae26 aggregated-ether-options lacp periodic fast
set interfaces ae26 aggregated-ether-options lacp system-id 00:00:00:00:00:22
set interfaces ae26 unit 0 family ethernet-switching interface-mode trunk

Configure the Layer 3 connection for VRF-151 towards the PNF.

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set interfaces irb unit 4088 virtual-gateway-accept-data
set interfaces irb unit 4088 family inet address 10.88.0.242/24 preferred
set interfaces irb unit 4088 family inet address 10.88.0.242/24 virtual-gateway-address 10.88.0.254
set interfaces irb unit 4088 family inet6 address 2001:db8::10:58:0:242/112 preferred
set interfaces irb unit 4088 family inet6 address 2001:db8::10:58:0:242/112 virtual-gateway-address 2001:db8::10:58:0:254
set interfaces irb unit 4088 virtual-gateway-v4-mac 00:00:5e:00:00:04
set interfaces ae26 unit 0 family ethernet-switching vlan members 4088
set vlans 4088 vlan-id 4088
set vlans 4088 l3-interface irb.4088
set vlans 4088 vxlan vni 104088

Configure the Layer 3 connection for VRF-152 towards the PNF.

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set interfaces irb unit 4089 virtual-gateway-accept-data
set interfaces irb unit 4089 family inet address 10.89.0.242/24 preferred
set interfaces irb unit 4089 family inet address 10.89.0.242/24 virtual-gateway-address 10.89.0.254
set interfaces irb unit 4089 family inet6 address 2001:db8::10:59:0:242/112 preferred
set interfaces irb unit 4089 family inet6 address 2001:db8::10:59:0:242/112 virtual-gateway-address 2001:db8::10:59:0:254
set interfaces irb unit 4089 virtual-gateway-v4-mac 00:00:5e:00:00:04
set interfaces ae26 unit 0 family ethernet-switching vlan members 4089
set vlans 4089 vlan-id 4089
set vlans 4089 l3-interface irb.4089
set vlans 4089 vxlan vni 104089

Configure a policy to export local routes from VRF-151 and VRF-152 to the PNF.

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set policy-options policy-statement DIRECT-EXPORT-TO-PNF term 10 from protocol direct
set policy-options policy-statement DIRECT-EXPORT-TO-PNF term 10 then accept
set policy-options policy-statement DIRECT-EXPORT-TO-PNF term 20 from protocol bgp
set policy-options policy-statement DIRECT-EXPORT-TO-PNF term 20 then accept
set policy-options policy-statement DIRECT-EXPORT-TO-PNF term 30 then reject

Configure the VRF-151 routing instance.

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set routing-instances VRF-151 instance-type vrf
set routing-instances VRF-151 interface irb.601
set routing-instances VRF-151 interface irb.602
set routing-instances VRF-151 interface irb.603
set routing-instances VRF-151 interface irb.604
set routing-instances VRF-151 interface lo0.151
set routing-instances VRF-151 interface irb.4088
set routing-instances VRF-151 route-distinguisher 192.186.0.2:151
set routing-instances VRF-151 vrf-target target:100:151
set routing-instances VRF-151 protocols bgp group to-srx type external
set routing-instances VRF-151 protocols bgp group to-srx export DIRECT-EXPORT-TO-PNF
set routing-instances VRF-151 protocols bgp group to-srx local-as 4200000002
set routing-instances VRF-151 protocols bgp group to-srx neighbor 10.88.0.1 family inet unicast
set routing-instances VRF-151 protocols bgp group to-srx neighbor 10.88.0.1 peer-as 4000000001
set routing-instances VRF-151 protocols bgp group to-srx neighbor 2001:db8::10:58:0:1 family inet6 unicast
set routing-instances VRF-151 protocols bgp group to-srx neighbor 2001:db8::10:58:0:1 peer-as 4000000001

Configure the VRF-152 routing instance.

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set routing-instances VRF-152 instance-type vrf
set routing-instances VRF-152 interface irb.605
set routing-instances VRF-152 interface irb.606
set routing-instances VRF-152 interface irb.607
set routing-instances VRF-152 interface irb.608
set routing-instances VRF-152 interface lo0.152
set routing-instances VRF-152 interface irb.4089
set routing-instances VRF-152 route-distinguisher 192.186.0.2:152
set routing-instances VRF-152 vrf-target target:100:152
set routing-instances VRF-152 protocols bgp group to-srx type external
set routing-instances VRF-152 protocols bgp group to-srx export DIRECT-EXPORT-TO-PNF
set routing-instances VRF-152 protocols bgp group to-srx local-as 4200000002
set routing-instances VRF-152 protocols bgp group to-srx neighbor 10.89.0.1 family inet unicast
set routing-instances VRF-152 protocols bgp group to-srx neighbor 10.89.0.1 peer-as 4000000001
set routing-instances VRF-152 protocols bgp group to-srx neighbor 2001:db8::10:59:0:1 family inet6 unicast
set routing-instances VRF-152 protocols bgp group to-srx neighbor 2001:db8::10:59:0:1 peer-as 4000000001

Repeat this procedure for every spine in your topology.

Verifying Service Chaining

To verify that service chaining is working:

On the spine, display the local routes in VRF-152.

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host@SPINE-2> show route table VRF-152.inet.0 protocol direct 
VRF-152.inet.0: 61 destinations, 62 routes (61 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10.2.93.0/24       *[Direct/0] 1d 15:30:29
                    >  via irb.605
10.2.94.0/24       *[Direct/0] 1d 15:30:29
                    >  via irb.606
10.2.95.0/24       *[Direct/0] 1d 15:30:29
                    >  via irb.607
10.2.96.0/24       *[Direct/0] 1d 15:30:29
                    >  via irb.608
10.87.0.0/24       *[Direct/0] 1d 15:30:37
                    >  via irb.4087
10.89.0.0/24       *[Direct/0] 1d 15:30:37
                    >  via irb.4089

On the spine, display the local routes in VRF-151.

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host@SPINE2> show route table VRF-151.inet.0 protocol direct    
VRF-151.inet.0: 63 destinations, 64 routes (63 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10.2.89.0/24       *[Direct/0] 1d 15:30:36
                    >  via irb.601
10.2.90.0/24       *[Direct/0] 1d 15:30:36
                    >  via irb.602
10.2.91.0/24       *[Direct/0] 1d 15:30:36
                    >  via irb.603
10.2.92.0/24       *[Direct/0] 1d 15:30:36
                    >  via irb.604
10.86.0.0/24       *[Direct/0] 1d 15:30:44
                    >  via irb.4086
10.88.0.0/24       *[Direct/0] 1d 15:30:44
                    >  via irb.4088

On the spine, check that a route lookup for VRF-151 points to the default route received from PNF.

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host@SPINE2> show route table VRF-151.inet.0 10.2.93.0
VRF-151.inet.0: 63 destinations, 64 routes (63 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

0.0.0.0/0          *[BGP/170] 1d 15:33:08, localpref 100
                      AS path: 4000000001 I, validation-state: unverified
                    >  to 10.88.0.1 via irb.4088

On the PNF device, check the route lookup toward the tenant VRF-152 destination.

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host@PNF> show route 10.2.93.0 
inet.0: 20 destinations, 52 routes (20 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

10.2.93.0/24       *[BGP/170] 2d 00:39:44, localpref 100
                      AS path: 4200000002 I, validation-state: unverified
                    > to 10.89.0.242 via ae26.1

On the PNF device, check that it is advertising only default routes to the EBGP peer on tenant VRF-152.

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host@PNF> show route advertising-protocol bgp 10.89.0.242 
inet.0: 20 destinations, 52 routes (20 active, 0 holddown, 0 hidden)
  Prefix                  Nexthop              MED     Lclpref    AS path
* 0.0.0.0/0               Self                                    I

On the PNF device, check that it is advertising only default routes to the EBGP peer on tenant VRF-151.

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host@PNF> show route advertising-protocol bgp 10.88.0.242
inet.0: 20 destinations, 52 routes (20 active, 0 holddown, 0 hidden)
  Prefix                  Nexthop              MED     Lclpref    AS path
* 0.0.0.0/0               Self                                    I

On the spine, verify that the spine is advertising local VRF-152 routes to the PNF.

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host@SPINE2> show route advertising-protocol bgp 10.89.0.1        
VRF-152.inet.0: 52 destinations, 53 routes (52 active, 0 holddown, 0 hidden)
  Prefix                  Nexthop              MED     Lclpref    AS path
* 10.2.93.0/24            Self                                    I
* 10.2.94.0/24            Self                                    I
* 10.2.95.0/24            Self                                    I
* 10.2.96.0/24            Self                                    I
* 10.87.0.0/24            Self                                    I
* 10.89.0.0/24            Self                                    I
* 192.68.152.1/32         Self                                    4100000000 I

On the spine, verify that the spine is advertising local VRF-151 routes to the PNF.

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host@SPINE2> show route advertising-protocol bgp 10.88.0.1    
VRF-151.inet.0: 53 destinations, 54 routes (53 active, 0 holddown, 0 hidden)
  Prefix                  Nexthop              MED     Lclpref    AS path
* 10.2.89.0/24            Self                                    I
* 10.2.90.0/24            Self                                    I
* 10.2.91.0/24            Self                                    I
* 10.2.92.0/24            Self                                    I
* 10.86.0.0/24            Self                                    I
* 10.88.0.0/24            Self                                    I
* 192.68.151.1/32         Self                                    4100000000 I

Service Chaining with Multicast

Service Chaining with Multicast Design
Configuring Service Chaining With Multicast
Verifying Service Chaining with Multicast

Service Chaining with Multicast Design

Figure 2 shows the logical view of the service chaining configuration. The VRF routing instances and IRB interfaces are all configured on the same spine.

In this design, we are performing service chaining with an SRX Series router as the PNF and with a PIM gateway.

Figure 2: Service Chaining Logical View

The flow of traffic for Spine 2 when multicast receivers start sending IGMP reports:

The leaf devices snoop the IGMP report and advertise EVPN Type 6 routes to the spines to notify the spines of the interested Multicast receiver.
The spine receives the EVPN Type 6 routes based on the VNI mapping, and creates a PIM join (*.G) entry in VRF-152.

The spine configuration includes the address of the RP on the PIM gateway. However, on the VRF-152 routing instance, there is only a default route toward the RP via the PNF.
The PIM designated router (DR) on the receiver side IRBs (irb.605, irb.606 irb.607, irb.608) sends a PIM join (*.G ) towards the PNF device on irb.4089.
The PNF device, creates a PIM (*.G) entry with ae26.1 as the outgoing interface.

The PNF is configured with the RP.

On the PNF, the RP is also configured on the PNF and the lookup to the PIM RP points toward interface ae26.0 -> interface towards VRF-151 on spines
The PIM join arrives on VRF-151 on irb.4088 and creates a PIM ( *,G ) state with irb.4088 as the outgoing interface and lookup towards the RP points to irb.4086.
The Spine sends the PIM join entry on irb.4086 towards the PIM gateway.
The PIM gateway receives the PIM (*,G ) join on ae10.2.

The flow of traffic for Spine 2 when the multicast source on VRF-151 starts sending packets:

VRF-151 creates a PIM (*,G ) entry with irb.4088 as the outgoing interface and also the RP reachable via irb.4086.
Spine 2 sends two packets—one toward the PNF on irb.4088 and one toward the PIM gateway on irb.4086.

When the PNF receives the packet:
1. The PNF forwards it based on the PIM ( *.G ) entry it created with outgoing interface ae26.1
2. Multicast traffic arrives on irb.4089 in VRF-512 and is forwarded to the receivers on the leafs.
When the PIM gateway receives the packet, it forwards the packet based on its (*,G) PIM entry with the outgoing interface as ae10.2.
When traffic arrives at irb.4086 from the PIM gateway on Spine 2, Spine 2 prunes the RPT/shared tree.

Configuring Service Chaining With Multicast

This section shows how to configure the spine for service chaining as shown in Figure 2.

Configure the ESI connection towards the PNF.

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set interfaces xe-0/0/67:0 gigether-options 802.3ad ae26
set interfaces ae26 esi 00:88:88:88:88:88:88:88:88:88
set interfaces ae26 esi all-active
set interfaces ae26 aggregated-ether-options lacp active
set interfaces ae26 aggregated-ether-options lacp periodic fast
set interfaces ae26 aggregated-ether-options lacp system-id 00:00:00:00:00:22
set interfaces ae26 unit 0 family ethernet-switching interface-mode trunk

Configure the Layer 3 connection for VRF-151 towards the PNF.

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set interfaces irb unit 4088 virtual-gateway-accept-data
set interfaces irb unit 4088 family inet address 10.88.0.242/24 preferred
set interfaces irb unit 4088 family inet address 10.88.0.242/24 virtual-gateway-address 10.88.0.254
set interfaces irb unit 4088 family inet6 address 2001:db8::40:58:0:242/112 preferred
set interfaces irb unit 4088 family inet6 address 2001:db8::40:58:0:242/112 virtual-gateway-address 2001:db8::40:58:0:254
set interfaces irb unit 4088 virtual-gateway-v4-mac 00:00:5e:00:00:04 
set interfaces ae26 unit 0 family ethernet-switching vlan members 4088 
set vlans 4088 vlan-id 4088
set vlans 4088 l3-interface irb.4088
set vlans 4088 vxlan vni 104088

Configure the Layer 3 connection for VRF-152 towards the PNF.

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set interfaces irb unit 4089 proxy-macip-advertisement
set interfaces irb unit 4089 virtual-gateway-accept-data
set interfaces irb unit 4089 family inet address 10.89.0.242/24 preferred
set interfaces irb unit 4089 family inet address 10.89.0.242/24 virtual-gateway-address 10.89.0.254
set interfaces irb unit 4089 family inet6 address 2001:db8::10:59:0:242/112 preferred
set interfaces irb unit 4089 family inet6 address 2001:db8::10:59:0:242/112 virtual-gateway-address 2001:db8::10:59:0:254
set interfaces irb unit 4089 virtual-gateway-v4-mac 00:00:5e:00:00:04 
set interfaces ae26 unit 0 family ethernet-switching vlan members 4089 
set vlans 4089 vlan-id 4089
set vlans 4089 l3-interface irb.4089
set vlans 4089 vxlan vni 104089

Configure the ESI connection towards the PIM gateway.

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set interfaces xe-0/0/67:1 gigether-options 802.3ad ae15 
set interfaces ae15 esi 00:22:22:22:22:22:22:22:22:22
set interfaces ae15 esi all-active
set interfaces ae15 aggregated-ether-options lacp active
set interfaces ae15 aggregated-ether-options lacp periodic fast
set interfaces ae15 aggregated-ether-options lacp system-id 00:00:00:00:00:22
set interfaces ae15 unit 0 family ethernet-switching interface-mode trunk

Configure the Layer 3 link for VRF-151 towards PIM gateway.

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set interfaces irb unit 4086 proxy-macip-advertisement
set interfaces irb unit 4086 virtual-gateway-accept-data
set interfaces irb unit 4086 family inet address 10.86.0.242/24 preferred
set interfaces irb unit 4086 family inet address 10.86.0.242/24 virtual-gateway-address 10.86.0.254
set interfaces irb unit 4086 virtual-gateway-v4-mac 00:00:5e:00:00:04 
set interfaces ae15 unit 0 family ethernet-switching vlan members 4086 
set vlans 4086 vlan-id 4086
set vlans 4086 l3-interface irb.4086
set vlans 4086 vxlan vni 104086

Configure the Layer 3 link for VRF-152 towards the PIM gateway.

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set interfaces irb unit 4087 proxy-macip-advertisement
set interfaces irb unit 4087 virtual-gateway-accept-data
set interfaces irb unit 4087 family inet address 10.87.0.242/24 preferred
set interfaces irb unit 4087 family inet address 10.87.0.242/24 virtual-gateway-address 10.87.0.254
set interfaces irb unit 4087 virtual-gateway-v4-mac 00:00:5e:00:00:04 
set interfaces ae15 unit 0 family ethernet-switching vlan members 4087 
set vlans 4087 vlan-id 4087
set vlans 4087 l3-interface irb.4087
set vlans 4087 vxlan vni 104087

Configure a policy to export local routes from VRF-151 and VRF-152 to the PNF.

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set policy-options policy-statement DIRECT-EXPORT-TO-SRX term 10 from protocol direct
set policy-options policy-statement DIRECT-EXPORT-TO-SRX term 10 then accept
set policy-options policy-statement DIRECT-EXPORT-TO-SRX term 20 from protocol bgp
set policy-options policy-statement DIRECT-EXPORT-TO-SRX term 20 then accept
set policy-options policy-statement DIRECT-EXPORT-TO-SRX term 30 then reject

Configure a policy to export local routes from VRF-151 and VRF-152 to the PIM gateway.

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set policy-options policy-statement DIRECT-EXPORT-TO-PIM term 10 from protocol direct
set policy-options policy-statement DIRECT-EXPORT-TO-PIM term 10 then accept
set policy-options policy-statement DIRECT-EXPORT-TO-PIM term 20 then reject

Configure a routing instance for VRF 151.

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set routing-instances VRF-151 instance-type vrf
set routing-instances VRF-151 interface irb.601
set routing-instances VRF-151 interface irb.602
set routing-instances VRF-151 interface irb.603
set routing-instances VRF-151 interface irb.604
set routing-instances VRF-151 interface lo0.151
set routing-instances VRF-151 interface irb.4088
set routing-instances VRF-151 interface irb.4086
set routing-instances VRF-151 route-distinguisher 192.186.0.2:151
set routing-instances VRF-151 vrf-target target:100:151
set routing-instances VRF-151 protocols bgp group to-srx type external
set routing-instances VRF-151 protocols bgp group to-srx export DIRECT-EXPORT-TO-SRX
set routing-instances VRF-151 protocols bgp group to-srx local-as 4200000002
set routing-instances VRF-151 protocols bgp group to-srx neighbor 10.88.0.1 family inet unicast
set routing-instances VRF-151 protocols bgp group to-srx neighbor 10.88.0.1 peer-as 4000000001
set routing-instances VRF-151 protocols bgp group to-srx neighbor 2001:db8::40:58:0:1 family inet6 unicast
set routing-instances VRF-151 protocols bgp group to-srx neighbor 2001:db8::40:58:0:1 peer-as 4000000001
set routing-instances VRF-151 protocols bgp group to-pim type external
set routing-instances VRF-151 protocols bgp group to-pim export DIRECT-EXPORT-TO-PIM
set routing-instances VRF-151 protocols bgp group to-pim local-as 4200000002
set routing-instances VRF-151 protocols bgp group to-pim neighbor 10.86.0.1 family inet unicast
set routing-instances VRF-151 protocols bgp group to-pim neighbor 10.86.0.1 peer-as 4100000000
set routing-instances VRF-151 protocols pim rp static address 192.68.151.1 group-ranges 225.0.4.0/24
set routing-instances VRF-151 protocols pim rp static address 192.68.152.1 group-ranges 225.0.5.0/24
set routing-instances VRF-151 protocols pim interface irb.601 family inet
set routing-instances VRF-151 protocols pim interface irb.601 mode sparse-dense
set routing-instances VRF-151 protocols pim interface irb.602 family inet
set routing-instances VRF-151 protocols pim interface irb.602 mode sparse-dense
set routing-instances VRF-151 protocols pim interface irb.604 family inet
set routing-instances VRF-151 protocols pim interface irb.604 mode sparse-dense
set routing-instances VRF-151 protocols pim interface irb.603 family inet
set routing-instances VRF-151 protocols pim interface irb.603 mode sparse-dense
set routing-instances VRF-151 protocols pim interface irb.4086 family inet
set routing-instances VRF-151 protocols pim interface irb.4086 mode sparse-dense
set routing-instances VRF-151 protocols pim interface irb.4088 family inet
set routing-instances VRF-151 protocols pim interface irb.4088 mode sparse-dense

Configure a routing instance for VRF 152.

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set routing-instances VRF-152 instance-type vrf
set routing-instances VRF-152 interface irb.605
set routing-instances VRF-152 interface irb.606
set routing-instances VRF-152 interface irb.607
set routing-instances VRF-152 interface irb.608
set routing-instances VRF-152 interface lo0.152
set routing-instances VRF-152 interface irb.4089
set routing-instances VRF-152 interface irb.4087
set routing-instances VRF-152 route-distinguisher 192.186.0.2:152
set routing-instances VRF-152 vrf-target target:100:152
set routing-instances VRF-152 protocols bgp group to-srx type external
set routing-instances VRF-152 protocols bgp group to-srx export DIRECT-EXPORT-TO-SRX
set routing-instances VRF-152 protocols bgp group to-srx local-as 4200000002
set routing-instances VRF-152 protocols bgp group to-srx neighbor 10.89.0.1 family inet unicast
set routing-instances VRF-152 protocols bgp group to-srx neighbor 10.89.0.1 peer-as 4000000001
set routing-instances VRF-152 protocols bgp group to-srx neighbor 2001:db8::10:59:0:1 family inet6 unicast
set routing-instances VRF-152 protocols bgp group to-srx neighbor 2001:db8::10:59:0:1 peer-as 4000000001
set routing-instances VRF-152 protocols bgp group to-pim type external
set routing-instances VRF-152 protocols bgp group to-pim export DIRECT-EXPORT-TO-PIM
set routing-instances VRF-152 protocols bgp group to-pim local-as 4200000002
set routing-instances VRF-152 protocols bgp group to-pim neighbor 10.87.0.1 family inet unicast
set routing-instances VRF-152 protocols bgp group to-pim neighbor 10.87.0.1 peer-as 4100000000
set routing-instances VRF-152 protocols pim rp static address 192.68.151.1 group-ranges 225.0.4.0/24
set routing-instances VRF-152 protocols pim rp static address 192.68.152.1 group-ranges 225.0.5.0/24
set routing-instances VRF-152 protocols pim interface irb.605 family inet
set routing-instances VRF-152 protocols pim interface irb.605 mode sparse-dense
set routing-instances VRF-152 protocols pim interface irb.606 family inet
set routing-instances VRF-152 protocols pim interface irb.606 mode sparse-dense
set routing-instances VRF-152 protocols pim interface irb.607 family inet
set routing-instances VRF-152 protocols pim interface irb.607 mode sparse-dense
set routing-instances VRF-152 protocols pim interface irb.608 family inet
set routing-instances VRF-152 protocols pim interface irb.608 mode sparse-dense
set routing-instances VRF-152 protocols pim interface irb.4087 family inet
set routing-instances VRF-152 protocols pim interface irb.4087 mode sparse-dense
set routing-instances VRF-152 protocols pim interface irb.4089 family inet
set routing-instances VRF-152 protocols pim interface irb.4089 mode sparse-dense

Repeat this procedure for every spine in your topology.

Verifying Service Chaining with Multicast

This section shows how to configure service chaining with Multicast. Note the following:

The multicast source is on VRF-151 - VLAN 601
The multicast receivers are on VRF-152 - VLAN 606

Display the interfaces on VRF-152 that are configured for PIM. This command shows the interfaces that are DRs.

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host@SPINE5> show pim interfaces instance VRF-152 
Stat = Status, V = Version, NbrCnt = Neighbor Count,
S = Sparse, D = Dense, B = Bidirectional,
DR = Designated Router, DDR = Dual DR, DistDR = Distributed DR,
P2P = Point-to-point link, P2MP = Point-to-Multipoint,
Active = Bidirectional is active, NotCap = Not Bidirectional Capable

Name               Stat Mode IP V State        NbrCnt JoinCnt(sg/*g) DR address
irb.4087           Up   SD    4 2 DR,NotCap         4 0/0            10.87.0.245
irb.4089           Up   SD    4 2 DR,NotCap         4 50/50          10.89.0.245
irb.605            Up   SD    4 2 DR,NotCap         3 0/0            10.2.93.245
irb.606            Up   SD    4 2 DR,NotCap         3 0/0            10.2.94.245
irb.607            Up   SD    4 2 DR,NotCap         3 0/0            10.2.95.245
irb.608            Up   SD    4 2 DR,NotCap         3 0/0            10.2.96.245
pime.32780         Up   S     4 2 P2P,NotCap        0 0/0
pime.32781         Up   S     4 2 P2P,NotCap        0 0/0

Display PIM groups on the Upstream interface towards RP and Source are pointing to irb.4089 – towards the PNF

content_copy zoom_out_map
host@SPINE5> show pim join extensive instance VRF-152 225.0.4.1 
Instance: PIM.VRF-152 Family: INET
R = Rendezvous Point Tree, S = Sparse, W = Wildcard

Group: 225.0.4.1
    Source: *
    RP: 192.68.151.1
    Flags: sparse,rptree,wildcard
    Upstream interface: irb.4089              
    Upstream neighbor: 10.89.0.1
    Upstream state: Join to RP
    Uptime: 00:14:30 
    Downstream neighbors:
        Interface: irb.606                
            10.2.94.245 State: Join Flags: SRW  Timeout: Infinity
            Uptime: 00:14:30 Time since last Join: 00:14:30
    Number of downstream interfaces: 1
    Number of downstream neighbors: 1

Group: 225.0.4.1
    Source: 10.2.89.5
    Flags: sparse,spt
    Upstream interface: irb.4089              
    Upstream neighbor: 10.89.0.1
    Upstream state: Join to Source, No Prune to RP
    Keepalive timeout: 317
    Uptime: 00:13:51 
    Downstream neighbors:
        Interface: irb.606                
            10.2.94.245 State: Join Flags: S   Timeout: Infinity
            Uptime: 00:13:51 Time since last Join: 00:13:51
    Number of downstream interfaces: 1
    Number of downstream neighbors: 1

Service Chaining— Release History

Table 1 provides a history of all of the features in this section and their support within this reference design.

Table 1: Service Chaining Release History
Release	Description
19.1R2	QFX10002-60C and QFX5120-32C switches running Junos OS Release 19.1R2 and later releases in the same release train support all features documented in this section.
18.4R2	QFX5120-48Y switches running Junos OS Release 18.4R2 and later releases in the same release train support all features documented in this section.
18.1R3-S3	All devices in the reference design that support Junos OS Release 18.1R3-S3 and later releases in the same release train also support all features documented in this section.

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