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play_arrow Overview
- play_arrow Understanding MPLS
  - MPLS Overview
- play_arrow Supported Standards
  - Supported MPLS Standards
play_arrow MPLS Configuration
- play_arrow Configuring MPLS
- play_arrow Configuring MPLS Tunnels
  - IPv6-over-Ipv4 Tunnels
  - Next-Hop-Based Dynamic Tunnels
play_arrow MPLS Traffic
- play_arrow Managing MPLS Traffic
- play_arrow Protecting MPLS Traffic
  - Node and Path Protection for MPLS LSPs
  - Link Protection for MPLS LSPs
- play_arrow Measuring MPLS Traffic
  - Gather Statistics on MPLS Sessions
play_arrow MPLS LSPs
- play_arrow Understanding MPLS LSPs
- play_arrow Configuring MPLS LSPs
play_arrow MPLS Signalling Protocols
- play_arrow RSVP
  - RSVP Overview
  - RSVP Configuration
- play_arrow LDP
play_arrow MPLS Traffic Engineering
- play_arrow Configuring MPLS Traffic Engineering
play_arrow MPLS Transport Profile
- play_arrow Operation, Administration, and Maintenance (OAM) for MPLS
  - MPLS OAM Configuration
- play_arrow MPLS Pseudowires
  - MPLS Pseudowires Configuration
  - Pseudowire Headend Termination (PWHT) Configuration
- play_arrow Class-of-Service (CoS) for MPLS
  - MPLS Class-of-Service Configuration
- play_arrow Generalized MPLS (GMPLS)
  - GMPLS Configuration
play_arrow MPLS VPNs and Circuits
- play_arrow Ethernet over MPLS (L2 Circuit)
  - Understanding Ethernet-over-MPLS (L2 Circuit)
  - Configuring Ethernet over MPLS (Layer 2 Circuit)
- play_arrow CCC, TCC, and Layer 2.5 Switching
  - CCC, TCC, and Ethernet Over MPLS Configuration
play_arrow MPLS for Software Defined Networking (SDN)
- play_arrow Path Computation Element Protocol (PCEP)
  - PCEP Configuration
play_arrow MPLS Troubleshooting
- play_arrow Troubleshooting MPLS
  - Troubleshooting MPLS
play_arrow Configuration Statements and Operational Commands
- Junos CLI Reference Overview

list Table of Contents

English

Example: Configuring Multipoint LDP Recursive FEC

date_range 20-Dec-24

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Note:

Our content testing team has validated and updated this example.

Use this configuration example to configure and verify Multipoint Label Distribution Protocol (LDP) Recursive forwarding equivalence class (FEC) in an OSPF network. This enables to form MLDP point-to-multipoint (P2MP) tunnels between two autonomous systems (ASs) when the backbone has no direct route to the root node.

Tip:

Table 1: Readability Score and Time Estimates
Reading Time	45 minutes
Configuration Time	1 hour

Example Prerequisites

Hardware requirements	MX Series routers as CE, PE, and intermediate routers.
Software requirements	Junos OS Release 23.4R1 or later running on all devices.

Before You Begin

Benefits	The Multipoint LDP (MLDP) Recursive Forwarding Equivalence Class (FEC) is useful in a deployment in which the intermediate routers do not have the route to reach the root node.
Know more	Understanding Multipoint LDP Recursive FEC.

Functional Overview

Technologies used	Service Family:Layer 3 VPN Protocols:BGP, IS-IS, LDP, MPLS, OSPF, PIM Transport Tunnels: MLDP P2MP,
Primary verification tasks	Verify LDP P2MP tunnel is formed. Verify the formation of LDP recursive FEC Verify the recursive opaque value functionality in the ingress and transit routers.

Topology Overview

This configuration example depicts a host system capable of sending multicast traffic and a host system capable of receiving multicast traffic. It shows two autonomous systems (ASes); AS65010 that consists of PE1, P1, and ASBR1 routers and AS65020 that consists of PE2, P2, and ASBR2 routers. All routers within an AS run OSPF as the IGP. All routers belong to area 0. The customer edge (CE) devices use EBGP peering to exchange routes with their provider edge device as part of a Layer 3 VPN service. The PE devices use IBGP to exchange IPv4 routes with the remote PE.

The Provider edge (PE2) and AS border router (ASBR2) routers have route to the root PE1. However, The P (P1 and P2) routers do not have a route towards the root. The MLDP P2MP tunnel is formed from the egress (PE2) to ingress (PE1) routers to pass the FEC element through mLDP.

Hostname	Role	Function
CE1	Remote CE device.	EBGP peer to PE1 router to advertise and learn CE device loopback addresses.
PE1 (DUT)	Local PE device.	The root node that intermediate routers of another AS try to reach in a scenario where there is no direct route to PE1.
P1	Intermediate device P1.	Intermediate router that has no route to PE2 router. It receives PE1-FEC from ASBR1 and processes it as a normal LDP P2MP FEC.
ASBR1	AS border router ASBR1	EBGP peer to ASBR2 router to advertise and learn IGP routes. The ASBR1 finds the route to the root (which is an IGP route) and replaces ASBR1-FEC with the contents of the Recursive Opaque Value (PE1-FEC) before doing any further processing.
ASBR2	AS border router ASBR2	EBGP peer to ASBR1 router to advertise and learn IGP routes. Acts as root node for P2 and does a lookup to find the route to actual root (PE1). Determines the route to PE1 is a BGP route and forms a LDP Recursive FEC with ASBR1 to PE1.
P2	Intermediate device P2.	Intermediate router that has no route to PE1 router. It receives the FEC element from PE2 through mLDP. However, it cannot use the same FEC element, because it does not have route to PE1.
PE2	Local PE device.	PE2 creates an MP FEC element with the address of PE1 as the root node address to form a P2MP tunnel from PE2 to root PE1.
CE2	Remote CE device.	EBGP peering to PE2 router to advertise and learn CE device loopback addresses.

Topology Illustration

Figure 1: MLDP FEC for Inter-AS with Recursive Opaque Value in MVPN Option C scenario

PE1 Configuration Steps

Note:

For complete sample configurations on PE1, see:

Appendix 1: Set Commands on All Devices
Appendix 2: Show Configuration Output on PE1 and ASBR2

This section highlights the main configuration tasks needed to configure the PE1 device for this example. The first step is common to configuring a basic Layer 3 VPN service. The following set of steps are specific to configuring recursive FEC. Both PE devices have a similar configuration, here we focus on PE1.

First, provision the general Layer 3 VPN:

Configure and number the loopback, core facing, and CE-facing interfaces for IPv4. Be sure to enable the mpls family on the core-facing interfaces connecting to the P devices to support MPLS switching.
Configure an autonomous system number.
Configure single area OSPF on the loopback and core-facing interfaces.
Configure LDP, MPLS on all the interfaces.
Configure the IBGP peering session to include the inet-vpn address family to support IPv4 layer 3 VPN.

Configure a VRF based routing-instance for the CE1 device. Use EBGP as the PE-CE routing protocol.

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set interfaces ge-0/0/0 description "CONNECTED TO CE1"
set interfaces ge-0/0/0 unit 0 family inet address 172.16.1.2/30

set interfaces ge-0/0/1 unit 0 family inet address 10.1.23.1/24
set interfaces ge-0/0/1 unit 0 family mpls

set interfaces lo0 unit 0 family inet address 192.168.100.2/32
set interfaces lo0 unit 1 family inet address 192.168.102.1/32

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[edit]
set chassis network-services enhanced-ip

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set routing-instances VPN1 instance-type vrf
set routing-instances VPN1 protocols bgp group CE1-PE1 type external
set routing-instances VPN1 protocols bgp group CE1-PE1 family inet unicast
set routing-instances VPN1 protocols bgp group CE1-PE1 export EXPORT-LOCAL-ROUTES
set routing-instances VPN1 protocols bgp group CE1-PE1 peer-as 65101
set routing-instances VPN1 protocols bgp group CE1-PE1 local-as 65100
set routing-instances VPN1 protocols bgp group CE1-PE1 neighbor 172.16.1.1
set routing-instances VPN1 interface ge-0/0/0.0
set routing-instances VPN1 interface lo0.1
set routing-instances VPN1 route-distinguisher 192.168.100.2:1
set routing-instances VPN1 vrf-table-label

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set protocols bgp group INT type internal
set protocols bgp group INT local-address 192.168.100.2
set protocols bgp group INT family inet labeled-unicast resolve-vpn
set protocols bgp group INT family inet-vpn any
set protocols bgp group INT family inet-mvpn signaling
set protocols bgp group INT peer-as 65100
set protocols bgp group INT local-as 65100
set protocols bgp group INT neighbor 192.168.100.3


set protocols ospf area 0.0.0.0 interface lo0.0 passive
set protocols ospf area 0.0.0.0 interface all
set protocols ospf area 0.0.0.0 interface fxp0.0 disable


set protocols ldp interface all
set protocols ldp interface fxp0.0 disable

set protocols mpls interface all
set protocols mpls interface fxp0.0 disable

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set routing-options router-id 192.168.100.2
set routing-options autonomous-system 65100

Configure the mode for C-PIM join messages to use rendezvous-point trees, and switch to the shortest-path tree after the source is known.
```
[edit]
set routing-instances VPN1 protocols mvpn mvpn-mode rpt-spt
set routing-instances VPN1 provider-tunnel ldp-p2mp
set routing-instances VPN1 vrf-target target:1:1
```
Configure PIM to enable PE to CE multicast routing.
```
[edit]
set routing-instances VPN1 protocols pim rp static address 192.168.100.1
```

Enable PIM on the interfaces connected to the CE router.

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[edit]
set routing-instances VPN1 protocols pim interface lo0.1
set routing-instances VPN1 protocols pim interface ge-0/0/0.0

Configure dynamic selective point-to-multipoint LSP and specify the data threshold required before the new tunnel is created.

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set routing-instances VPN1 provider-tunnel selective group 225.1.1.1/32 source 172.16.12.1/32 ldp-p2mp
set routing-instances VPN1 provider-tunnel selective group 225.1.1.1/32 source 172.16.12.1/32 threshold-rate 1

Configure point-to-multipoint recursive LDP FEC.
```
[edit]

set protocols ldp p2mp recursive fec
```

Configure the routing policies.

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set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 from protocol direct
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 then accept

Verification

Command	Verification Task
show ldp overview	Verify `Recursive fec` enabled in the LDP overview information.
show ldp database	Verify the labels advertised point-to-multipoint binding information in the LDP database.
show ldp p2mp path	Verify LDP P2MP FEC information.
show ldp p2mp fec	Verify LDP P2MP LSPs.

Verify Recursive FEC in the LDP overview information.
Verify the Advertised Label
Verify P2MP FEC Information
Verify P2MP Path Information

Verify Recursive FEC in the LDP overview information.

Purpose
Action
Meaning

Purpose

To confirm recursive FEC is enabled and is displayed in PE1 LDP overview information.

Action

From operational mode, enter the show ldp overview command.

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user@PE1 show ldp overview
Instance: master
  Reference count: 3
  Router ID: 192.168.100.2
  LDP inet: enabled
  Transport preference: IPv4
  Message id: 33
  Configuration sequence: 12
  Deaggregate: disabled
  Explicit null: disabled
  IPv6 tunneling: disabled
  Strict targeted hellos: disabled
  Loopback if added: yes
  Route preference: 9
  P2MP max branches: 4096
  Unicast transit LSP chaining: disabled
  P2MP transit LSP chaining: disabled
  Transit LSP statistics based on route statistics: disabled
  LDP route acknowledgement: enabled
  BGP export: enabled
  No TTL propagate: disabled
  LDP mtu discovery: disabled
  LDP SR Mapping Client: disabled
  Capabilities enabled: p2mp, make-before-break
  Egress FEC capabilities enabled: entropy-label-capability
  Downstream unsolicited Sessions:
    Operational: 1
    Retention: liberal
    Control: ordered
  Auto targeted sessions:
    Auto targeted: disabled
    Dynamic tunnel session count: 0
  P2MP:
    Recursive route: disabled           
    Recursive fec: enabled
    No rsvp tunneling: disabled
  Timers:
    Keepalive interval: 10, Keepalive timeout: 30
    Link hello interval: 5, Link hello hold time: 15
    Targeted hello interval: 15, Targeted hello hold time: 45
    Label withdraw delay: 60, Make before break timeout: 30
    Make before break switchover delay: 3
    Link protection timeout: 120
  Graceful restart:
    Restart: disabled, Helper: enabled, Restart in process: false
    Reconnect time: 60000, Max neighbor reconnect time: 120000
    Recovery time: 160000, Max neighbor recovery time: 240000
  Traffic Engineering:
    Bgp igp: disabled
    Both ribs: disabled
    Mpls forwarding: disabled
  IGP:
    Tracking igp metric: disabled
    Sync session up delay: 10
  Session protection:
    Session protection: disabled
    Session protection timeout: 0
  Interface addresses advertising:
    10.1.23.1
    192.168.100.2
  LDP Job:
    Read job time quantum: 1000, Write job time quantum: 1000
    Read job loop quantum: 100, Write job loop quantum: 100
    Backup inbound read job time quantum: 1000, Backup outbound read job time quantum: 1000
    Backup inbound read job loop quantum: 100, Backup outbound read job loop quantum: 100
  Label allocation:
    Current number of LDP labels allocated: 2
    Total number of LDP labels allocated: 51
    Total number of LDP labels freed: 49
    Total number of LDP label allocation failure: 0
    Current number of labels allocated by all protocols: 0

Meaning

The output confirms that recursive fec is enabled on PE1.

Purpose

Verify the labels advertised from ASBR1 and received by PE1.

Action

From operational mode, enter the show ldp database command.

On ASBR1

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user@ASBR1 show ldp database
Input label database, 192.168.100.4:0--192.168.100.5:0
Labels received: 5
  Label     Prefix
    145      192.168.100.4/32
      3      192.168.100.5/32
    139      192.168.100.6/32
    140      192.168.100.7/32
    144      P2MP root-addr 192.168.100.2, lsp-id 16777220 next-root:192.168.100.4

Output label database, 192.168.100.4:0--192.168.100.5:0
Labels advertised: 4
  Label     Prefix
      3      192.168.100.4/32
    164      192.168.100.5/32
    159      192.168.100.2/32
    158      192.168.100.3/32

Input label database, 192.168.100.4:0--192.168.100.3:0
Labels received: 3
  Label     Prefix
    125      192.168.100.4/32
     88      192.168.100.2/32
      3      192.168.100.3/32

Output label database, 192.168.100.4:0--192.168.100.3:0
Labels advertised: 5
  Label     Prefix
      3      192.168.100.4/32
    164      192.168.100.5/32
    159      192.168.100.2/32
    158      192.168.100.3/32
    163      P2MP root-addr 192.168.100.2, lsp-id 16777220

On PE1

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user@PE1 show ldp database
Input label database, 192.168.100.2:0--192.168.100.3:0
Labels received: 4
  Label     Prefix
    125      192.168.100.4/32
     88      192.168.100.2/32
     3     192.168.100.3/32
    129      P2MP root-addr 192.168.100.2, lsp-id 16777220

Output label database, 192.168.100.2:0--192.168.100.3:0
Labels advertised: 3
  Label     Prefix
    107      192.168.100.4/32
      3      192.168.100.2/32
    104      192.168.100.3/32

Meaning

You can see label 3 advertised from ASBR1 and label 3 received by PE1.

Verify P2MP FEC Information

Purpose
Action
Meaning

Purpose

Verify the LDP P2MP FEC information from ASBR2.

Action

From operational mode, enter the show ldp p2mp fec extensive command.

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user@PE2 show ldp p2mp fec extensive
LDP P2MP FECs:
 P2MP root-addr 192.168.100.2, lsp-id 16777220 next-root: 192.168.100.5 
  Fec type: Egress (Active)
  Label: 52, Reference count:    1

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user@ASBR2 show ldp p2mp fec extensive
LDP P2MP FECs:
 P2MP root-addr 192.168.100.2, lsp-id 16777220
  Fec type: Transit (Active)
  Label: 144, Reference count:    1

Meaning

The output shows that PE2 forms a LDP recursive FEC to find the route to actual root (PE1).

Verify P2MP Path Information

Purpose
Action
Meaning

Purpose

Verify the LDP P2MP path information from PE2.

Action

From operational mode, enter the show ldp p2mp path extensive command.

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user@PE2 show ldp p2mp path extensive
P2MP path type: Transit/Egress
  Output Session (label): 192.168.100.6:0 (52) (Primary)
  Egress label: 52
  Attached FECs:  P2MP root-addr 192.168.100.2, lsp-id 16777220 next-root:192.168.100.5 (Active)
  Address: 0x76f69e0, Reference count: 2

Meaning

The output shows PE2 with the FEC element, in which the root node address is the address of protocol nexthop ASBR2.

Appendix 1: Set Commands on All Devices

To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, and then copy and paste the commands into the CLI at the [edit] hierarchy level.

Note:

We use logical systems to represent the source and receiver for this example.

CE1
PE1
P1
ASBR1
ASBR2
P2
PE2
CE2

CE1

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set system host-name CE1-source
set logical-systems source interfaces lt-0/0/0 unit 12 encapsulation ethernet
set logical-systems source interfaces lt-0/0/0 unit 12 peer-unit 11
set logical-systems source interfaces lt-0/0/0 unit 12 family inet address 172.16.12.1/30
set logical-systems source interfaces lo0 unit 12 family inet address 192.168.12.12/32
set logical-systems source protocols ospf area 0.0.0.0 interface all
set logical-systems source protocols ospf area 0.0.0.0 interface lo0.12 passive
set logical-systems source protocols pim rp static address 192.168.100.1
set logical-systems source protocols pim interface lt-0/0/0.12
set chassis fpc 0 pic 0 tunnel-services
set chassis network-services enhanced-ip
set interfaces lt-0/0/0 description "CONNECTED TO source"
set interfaces lt-0/0/0 unit 11 encapsulation ethernet
set interfaces lt-0/0/0 unit 11 peer-unit 12
set interfaces lt-0/0/0 unit 11 family inet address 172.16.12.2/30
set interfaces ge-0/0/1 description "CONNECTED TO PE1"
set interfaces ge-0/0/1 unit 0 family inet address 172.16.1.1/30
set interfaces lo0 unit 0 family inet address 192.168.100.1/32
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 from protocol direct
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 then accept
set routing-options router-id 192.168.100.1
set routing-options autonomous-system 65101
set protocols bgp group CE1-PE1 type external
set protocols bgp group CE1-PE1 family inet unicast
set protocols bgp group CE1-PE1 export EXPORT-LOCAL-ROUTES
set protocols bgp group CE1-PE1 peer-as 65100
set protocols bgp group CE1-PE1 local-as 65101
set protocols bgp group CE1-PE1 neighbor 172.16.1.2
set protocols ospf area 0.0.0.0 interface all
set protocols ospf area 0.0.0.0 interface fxp0.0 disable
set protocols ospf area 0.0.0.0 interface lo0.0 passive
set protocols pim rp local family inet address 192.168.100.1
set protocols pim interface lo0.0
set protocols pim interface ge-0/0/1.0
set protocols pim interface lt-0/0/0.11

PE1

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set system host-name PE1
set chassis network-services enhanced-ip
set interfaces ge-0/0/0 description "CONNECTED TO CE1"
set interfaces ge-0/0/0 unit 0 family inet address 172.16.1.2/30
set interfaces ge-0/0/1 description "CONNECTED TO P1"
set interfaces ge-0/0/1 unit 0 family inet address 10.1.23.1/24
set interfaces ge-0/0/1 unit 0 family mpls
set interfaces lo0 unit 0 family inet address 192.168.100.2/32
set interfaces lo0 unit 1 family inet address 192.168.102.1/32
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 from protocol direct
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 then accept
set routing-instances VPN1 instance-type vrf
set routing-instances VPN1 protocols bgp group CE1-PE1 type external
set routing-instances VPN1 protocols bgp group CE1-PE1 family inet unicast
set routing-instances VPN1 protocols bgp group CE1-PE1 export EXPORT-LOCAL-ROUTES
set routing-instances VPN1 protocols bgp group CE1-PE1 peer-as 65101
set routing-instances VPN1 protocols bgp group CE1-PE1 local-as 65100
set routing-instances VPN1 protocols bgp group CE1-PE1 neighbor 172.16.1.1
set routing-instances VPN1 protocols mvpn mvpn-mode rpt-spt
set routing-instances VPN1 protocols pim rp static address 192.168.100.1
set routing-instances VPN1 protocols pim interface lo0.1 mode sparse
set routing-instances VPN1 protocols pim interface ge-0/0/0.0 mode sparse
set routing-instances VPN1 interface ge-0/0/0.0
set routing-instances VPN1 interface lo0.1
set routing-instances VPN1 route-distinguisher 192.168.100.2:1
set routing-instances VPN1 vrf-target target:1:1
set routing-instances VPN1 vrf-table-label
set routing-instances VPN1 provider-tunnel ldp-p2mp
set routing-instances VPN1 provider-tunnel selective group 225.1.1.1/32 source 172.16.12.1/32 ldp-p2mp
set routing-instances VPN1 provider-tunnel selective group 225.1.1.1/32 source 172.16.12.1/32 threshold-rate 51
set routing-options router-id 192.168.100.2
set routing-options autonomous-system 65100
set protocols bgp group INT type internal
set protocols bgp group INT local-address 192.168.100.2
set protocols bgp group INT family inet labeled-unicast resolve-vpn
set protocols bgp group INT family inet-vpn any
set protocols bgp group INT family inet-mvpn signaling
set protocols bgp group INT peer-as 65100
set protocols bgp group INT local-as 65100
set protocols bgp group INT neighbor 192.168.100.3
set protocols ldp interface all
set protocols ldp interface fxp0.0 disable
set protocols ldp p2mp recursive fec    
set protocols mpls interface all
set protocols mpls interface fxp0.0 disable
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0
set protocols ospf area 0.0.0.0 interface lo0.0 passive

P1

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set system host-name P1
set chassis network-services enhanced-ip
set interfaces ge-0/0/0 unit 0 family inet address 10.1.23.2/24
set interfaces ge-0/0/0 unit 0 family mpls
set interfaces ge-0/0/1 unit 0 family inet address 10.1.34.1/24
set interfaces ge-0/0/1 unit 0 family mpls
set interfaces lo0 unit 0 family inet address 192.168.100.3/32
set routing-options router-id 192.168.100.3
set routing-options autonomous-system 65100
set protocols bgp group INT type internal
set protocols bgp group INT local-address 192.168.100.3
set protocols bgp group INT family inet labeled-unicast resolve-vpn
set protocols bgp group INT family inet-vpn any
set protocols bgp group INT family inet-mvpn signaling
set protocols bgp group INT cluster 192.168.100.3
set protocols bgp group INT local-as 65100
set protocols bgp group INT neighbor 192.168.100.2
set protocols bgp group INT neighbor 192.168.100.4
set protocols bgp group eBGP_PE_PE type external
set protocols bgp group eBGP_PE_PE multihop ttl 25
set protocols bgp group eBGP_PE_PE local-address 192.168.100.3
set protocols bgp group eBGP_PE_PE family inet-vpn any
set protocols bgp group eBGP_PE_PE family inet-mvpn signaling
set protocols bgp group eBGP_PE_PE neighbor 192.168.100.6 peer-as 65200
set protocols ldp interface all
set protocols ldp interface fxp0.0 disable
set protocols ldp p2mp recursive route
set protocols ospf area 0.0.0.0 interface ge-0/0/0.0
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0
set protocols ospf area 0.0.0.0 interface lo0.0 passive

ASBR1

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set system host-name ASBR1
set chassis network-services enhanced-ip
set interfaces ge-0/0/0 unit 0 family inet address 10.1.34.2/24
set interfaces ge-0/0/0 unit 0 family mpls
set interfaces ge-0/0/1 unit 0 family inet address 10.1.45.1/24
set interfaces ge-0/0/1 unit 0 family iso
set interfaces ge-0/0/1 unit 0 family mpls
set interfaces lo0 unit 0 family inet address 192.168.100.4/32
set interfaces lo0 unit 0 family iso address 49.0001.0040.0400.4004.00
set policy-options policy-statement To-ASBR2 term 1 from route-filter 192.168.100.2/32 exact
set policy-options policy-statement To-ASBR2 term 1 from route-filter 192.168.100.3/32 exact
set policy-options policy-statement To-ASBR2 term 1 then accept
set policy-options policy-statement To-ASBR2 term 2 then reject
set policy-options policy-statement from-direct term 1 from interface lo0.0
set policy-options policy-statement from-direct term 1 then accept
set policy-options policy-statement from-ospf term 1 from protocol ospf
set policy-options policy-statement from-ospf term 1 then accept
set routing-options router-id 192.168.100.4
set routing-options autonomous-system 65100
set protocols bgp group INT type internal
set protocols bgp group INT local-address 192.168.100.4
set protocols bgp group INT family inet labeled-unicast resolve-vpn
set protocols bgp group INT peer-as 65100
set protocols bgp group INT local-as 65100
set protocols bgp group INT neighbor 192.168.100.3
set protocols bgp group eBGP_ASBR type external
set protocols bgp group eBGP_ASBR multihop ttl 2
set protocols bgp group eBGP_ASBR local-address 192.168.100.4
set protocols bgp group eBGP_ASBR family inet labeled-unicast resolve-vpn
set protocols bgp group eBGP_ASBR export from-ospf
set protocols bgp group eBGP_ASBR export from-direct
set protocols bgp group eBGP_ASBR export To-ASBR2
set protocols bgp group eBGP_ASBR neighbor 192.168.100.5 peer-as 65200
set protocols isis interface ge-0/0/1.0 level 2 disable
set protocols isis interface lo0.0      
set protocols isis level 2 disable
set protocols ldp interface all
set protocols ldp interface fxp0.0 disable
set protocols ldp p2mp recursive fec
set protocols ospf area 0.0.0.0 interface ge-0/0/0.0
set protocols ospf area 0.0.0.0 interface lo0.0 passive

ASBR2

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set system host-name ASBR2
set chassis network-services enhanced-ip
set interfaces ge-0/0/0 unit 0 family inet address 10.1.45.2/24
set interfaces ge-0/0/0 unit 0 family iso
set interfaces ge-0/0/0 unit 0 family mpls
set interfaces ge-0/0/1 unit 0 family inet address 10.1.56.1/24
set interfaces ge-0/0/1 unit 0 family mpls
set interfaces lo0 unit 0 family inet address 192.168.100.5/32
set interfaces lo0 unit 0 family iso address 49.0001.0050.0500.5005.00
set policy-options policy-statement To-ASBR1 term 1 from route-filter 192.168.100.7/32 exact
set policy-options policy-statement To-ASBR1 term 1 from route-filter 192.168.100.6/32 exact
set policy-options policy-statement To-ASBR1 term 1 then accept
set policy-options policy-statement To-ASBR1 term 2 then reject
set policy-options policy-statement from-direct term 1 from interface lo0.0
set policy-options policy-statement from-direct term 1 then accept
set policy-options policy-statement from-ospf term 1 from protocol ospf
set policy-options policy-statement from-ospf term 1 then accept
set routing-options router-id 192.168.100.5
set routing-options autonomous-system 65200
set protocols bgp group INT type internal
set protocols bgp group INT local-address 192.168.100.5
set protocols bgp group INT family inet labeled-unicast resolve-vpn
set protocols bgp group INT peer-as 65200
set protocols bgp group INT local-as 65200
set protocols bgp group INT neighbor 192.168.100.6
set protocols bgp group eBGP_ASBR type external
set protocols bgp group eBGP_ASBR multihop ttl 2
set protocols bgp group eBGP_ASBR local-address 192.168.100.5
set protocols bgp group eBGP_ASBR family inet labeled-unicast resolve-vpn
set protocols bgp group eBGP_ASBR export from-ospf
set protocols bgp group eBGP_ASBR export from-direct
set protocols bgp group eBGP_ASBR export To-ASBR1
set protocols bgp group eBGP_ASBR neighbor 192.168.100.4 peer-as 65100
set protocols isis interface ge-0/0/0.0 level 2 disable
set protocols isis interface lo0.0
set protocols isis level 2 disable
set protocols ldp interface all
set protocols ldp interface fxp0.0 disable
set protocols ldp p2mp recursive fec
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0
set protocols ospf area 0.0.0.0 interface lo0.0 passive

P2

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set system host-name P2
set chassis network-services enhanced-ip
set interfaces ge-0/0/0 unit 0 family inet address 10.1.56.2/24
set interfaces ge-0/0/0 unit 0 family mpls
set interfaces ge-0/0/1 unit 0 family inet address 10.1.67.1/24
set interfaces ge-0/0/1 unit 0 family mpls
set interfaces lo0 unit 0 family inet address 192.168.100.6/32
set routing-options router-id 192.168.100.6
set routing-options autonomous-system 65200
set protocols bgp group INT type internal
set protocols bgp group INT local-address 192.168.100.6
set protocols bgp group INT family inet labeled-unicast resolve-vpn
set protocols bgp group INT family inet-vpn any
set protocols bgp group INT family inet-mvpn signaling
set protocols bgp group INT cluster 192.168.100.6
set protocols bgp group INT local-as 65200
set protocols bgp group INT neighbor 192.168.100.5
set protocols bgp group INT neighbor 192.168.100.7
set protocols bgp group eBGP_PE_PE type external
set protocols bgp group eBGP_PE_PE multihop ttl 25
set protocols bgp group eBGP_PE_PE local-address 192.168.100.6
set protocols bgp group eBGP_PE_PE family inet-vpn any
set protocols bgp group eBGP_PE_PE family inet-mvpn signaling
set protocols bgp group eBGP_PE_PE neighbor 192.168.100.3 peer-as 65100
set protocols ldp interface all
set protocols ldp interface fxp0.0 disable
set protocols ldp p2mp recursive route
set protocols ospf area 0.0.0.0 interface ge-0/0/0.0
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0
set protocols ospf area 0.0.0.0 interface lo0.0 passive

PE2

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set system host-name PE2
set chassis network-services enhanced-ip
set interfaces ge-0/0/0 unit 0 family inet address 10.1.67.2/24
set interfaces ge-0/0/0 unit 0 family mpls
set interfaces ge-0/0/1 description "CONNECTED TO CE2"
set interfaces ge-0/0/1 unit 0 family inet address 172.16.2.2/30
set interfaces lo0 unit 0 family inet address 192.168.100.7/32
set interfaces lo0 unit 1 family inet address 192.168.100.17/32
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 from protocol direct
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 then accept
set routing-instances VPN2 instance-type vrf
set routing-instances VPN2 protocols bgp group PE2-CE2 type external
set routing-instances VPN2 protocols bgp group PE2-CE2 family inet unicast
set routing-instances VPN2 protocols bgp group PE2-CE2 export EXPORT-LOCAL-ROUTES
set routing-instances VPN2 protocols bgp group PE2-CE2 peer-as 65201
set routing-instances VPN2 protocols bgp group PE2-CE2 local-as 65200
set routing-instances VPN2 protocols bgp group PE2-CE2 neighbor 172.16.2.1
set routing-instances VPN2 protocols mvpn mvpn-mode rpt-spt
set routing-instances VPN2 protocols pim rp static address 192.168.100.1
set routing-instances VPN2 protocols pim interface lo0.1 mode sparse
set routing-instances VPN2 protocols pim interface ge-0/0/1.0 mode sparse
set routing-instances VPN2 protocols pim interface all
set routing-instances VPN2 interface ge-0/0/1.0
set routing-instances VPN2 interface lo0.1
set routing-instances VPN2 route-distinguisher 192.168.100.17:1
set routing-instances VPN2 vrf-target target:1:1
set routing-instances VPN2 vrf-table-label
set routing-options router-id 192.168.100.7
set routing-options autonomous-system 65200
set protocols bgp group INT type internal
set protocols bgp group INT local-address 192.168.100.7
set protocols bgp group INT family inet labeled-unicast resolve-vpn
set protocols bgp group INT family inet-vpn any
set protocols bgp group INT family inet-mvpn signaling
set protocols bgp group INT peer-as 65200
set protocols bgp group INT local-as 65200
set protocols bgp group INT neighbor 192.168.100.6
set protocols ldp interface all
set protocols ldp interface fxp0.0 disable
set protocols ldp p2mp recursive fec
set protocols mpls interface all
set protocols mpls interface fxp0.0 disable
set protocols ospf area 0.0.0.0 interface ge-0/0/0.0
set protocols ospf area 0.0.0.0 interface lo0.0 passive

CE2

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set system host-name CE2-receiver
set logical-systems receiver interfaces lt-0/0/0 unit 22 encapsulation ethernet
set logical-systems receiver interfaces lt-0/0/0 unit 22 peer-unit 21
set logical-systems receiver interfaces lt-0/0/0 unit 22 family inet address 172.16.22.22/30
set logical-systems receiver interfaces lo0 unit 22 family inet address 192.168.22.22/32
set logical-systems receiver protocols ospf area 0.0.0.0 interface all
set chassis fpc 0 pic 0 tunnel-services
set chassis network-services enhanced-ip
set interfaces ge-0/0/0 description "CONNECTED TO PE2"
set interfaces ge-0/0/0 unit 0 family inet address 172.16.2.1/30
set interfaces lt-0/0/0 description "CONNECTED FROM CE2 TO receiver"
set interfaces lt-0/0/0 unit 21 encapsulation ethernet
set interfaces lt-0/0/0 unit 21 peer-unit 22
set interfaces lt-0/0/0 unit 21 family inet address 172.16.22.21/30
set interfaces lo0 unit 0 family inet address 192.168.100.8/32
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 from protocol direct
set policy-options policy-statement EXPORT-LOCAL-ROUTES term 1 then accept
set routing-options router-id 192.168.100.8
set routing-options autonomous-system 65201
set protocols bgp group CE2-PE2 type external
set protocols bgp group CE2-PE2 family inet unicast
set protocols bgp group CE2-PE2 export EXPORT-LOCAL-ROUTES
set protocols bgp group CE2-PE2 peer-as 65200
set protocols bgp group CE2-PE2 local-as 65201
set protocols bgp group CE2-PE2 neighbor 172.16.2.2
set protocols igmp interface lt-0/0/0.21 static group 225.1.1.1
set protocols ospf area 0.0.0.0 interface all
set protocols ospf area 0.0.0.0 interface fxp0.0 disable
set protocols ospf area 0.0.0.0 interface lo0.0 passive
set protocols pim rp static address 192.168.100.1
set protocols pim interface all
set protocols pim interface fxp0.0 disable
set protocols sap listen 225.1.1.1 port 5000

Appendix 2: Show Configuration Output on PE1 and ASBR2

The Complete PE1 configuration in Curly Brace Format
The Complete ASBR2 configuration in Curly Brace Format

The Complete PE1 configuration in Curly Brace Format

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user@PE1# show | no-more
system {
    host-name PE1;
}
interfaces {
    ge-0/0/0 {
        description "CONNECTED TO CE1";
        unit 0 {
            family inet {
                address 172.16.1.2/30;
            }
        }
    }
    ge-0/0/1 {
        description "CONNECTED TO P1";
        unit 0 {
            family inet {
                address 10.1.23.1/24;
            }
            family mpls;
        }
    }
    lo0 {
        unit 0 {
            family inet {
                address 192.168.100.2/32;
            }
        }
        unit 1 {
            family inet {
                address 192.168.102.1/32;
            }
        }
    }
}
policy-options {
    policy-statement EXPORT-LOCAL-ROUTES {
        term 1 {
            from protocol direct;
            then accept;
        }
    }
}
routing-instances {
    VPN1 {
        instance-type vrf;
        protocols {
            bgp {
                group CE11-PE1 {
                    type external;
                    family inet {
                        unicast;
                    }
                    export EXPORT-LOCAL-ROUTES;
                    peer-as 65101;
                    local-as 65100;
                    neighbor 172.16.1.1;
                }
            }
            mvpn {
                mvpn-mode {
                    rpt-spt;
                }
            }
            pim {
                rp {
                    static {
                        address 192.168.100.1;
                    }
                }
                interface lo0.1;
                interface ge-0/0/0.0;
            }
        }
        interface ge-0/0/0.0;
        interface lo0.1;
        route-distinguisher 192.168.100.2:1;
        vrf-target target:1:1;
        vrf-table-label;
        provider-tunnel {
            ldp-p2mp;
            selective {
                group 225.1.1.1/32 {
                    source 172.16.12.1/32 {
                        ldp-p2mp;
                        threshold-rate 1;
                    }
                }
            }
        }
    }
}
routing-options {
    router-id 192.168.100.2;
    autonomous-system 65100;
    nonstop-routing;
}
protocols {
    bgp {
        group INT {
            type internal;
            local-address 192.168.100.2;
            family inet {
                labeled-unicast {
                    resolve-vpn;
                }
            }
            family inet-vpn {
                any;
            }
            family inet-mvpn {
                signaling;
            }
            export from-direct;
            peer-as 65100;
            local-as 65100;
            neighbor 192.168.100.3;
        }
    }
    ldp {
        interface all;
        interface fxp0.0 {
            disable;
        }
        p2mp {
            recursive {
                fec;
            }
        }
    }
    mpls {
        interface all;
        interface fxp0.0 {
            disable;
        }
    }
    ospf {
        area 0.0.0.0 {
            interface lo0.0 {
                passive;
            }
            interface all;
            interface fxp0.0 {
                disable;
            }
        }
    }
}

The Complete ASBR2 configuration in Curly Brace Format

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user@ASBR2# show | no-more
system {
    host-name ASBR2;
}
interfaces {
    ge-0/0/0 {
        unit 0 {
            family inet {
                address 10.1.45.2/24;
            }
            family iso;
            family mpls;
        }
    }
    ge-0/0/1 {
        unit 0 {
            family inet {
                address 10.1.56.1/24;
            }
            family mpls;
        }
    }
    lo0 {
        unit 0 {
            family inet {
                address 192.168.100.5/32;
            }
            family iso {
                address 49.0001.0060.0600.6006.00;
            }
        }
    }
}
policy-options {
    policy-statement NHP {
        term 1 {
            from protocol bgp;
            then {
                next-hop self;
                accept;
            }
        }
    }
    policy-statement To-ASBR1 {
        term 1 {
            from {
                route-filter 192.168.100.7/32 exact;
                route-filter 192.168.100.6/32 exact;
            }
            then accept;
        }
        term 2 {
            then reject;
        }
    }
    policy-statement from-direct {
        term 1 {
            from interface lo0.0;
            then accept;
        }
    }
    policy-statement from-ospf {
        term 1 {
            from protocol ospf;
            then accept;
        }
    }
}
routing-options {
    router-id 192.168.100.5;
    autonomous-system 65200;
    nonstop-routing;
}
protocols {
    bgp {
        group INT {
            type internal;
            local-address 192.168.100.5;
            family inet {
                labeled-unicast {
                    resolve-vpn;
                }
            }
            peer-as 65200;
            local-as 65200;
            neighbor 192.168.100.6 {
                export NHP;
            }
        }
        group eBGP_ASBR1-ASBR2 {
            type external;
            local-address 192.168.100.5;
            family inet {
                labeled-unicast {
                    resolve-vpn;
                }
            }
            export [ from-ospf from-direct To-ASBR1 ];
            neighbor 192.168.100.4 {
                multihop;
                peer-as 65100;
            }
        }
    }
    isis {
        interface ge-0/0/0.0 {
            level 2 disable;
        }
        interface lo0.0 {
            level 1 {
                passive;
            }
        }
    }
    ldp {
        interface all;
        interface fxp0.0 {
            disable;
        }
        p2mp {
            recursive {
                fec;
            }
        }
    }
    ospf {
        traffic-engineering;
        area 0.0.0.0 {
            interface ge-0/0/1.0;
            interface lo0.0 {
                passive;
            }
        }
    }
}                         

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MPLS Applications User Guide

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Example: Configuring Multipoint LDP Recursive FEC

Example Prerequisites

Before You Begin

Functional Overview

Topology Overview

Topology Illustration

PE1 Configuration Steps

Verification

Verify Recursive FEC in the LDP overview information.

Purpose

Action

Meaning

Verify the Advertised Label

Purpose

Action

Meaning

Verify P2MP FEC Information

Purpose

Action

Meaning

Verify P2MP Path Information

Purpose

Action

Meaning

Appendix 1: Set Commands on All Devices

CE1

PE1

P1

ASBR1

ASBR2

P2

PE2

CE2

Appendix 2: Show Configuration Output on PE1 and ASBR2

The Complete PE1 configuration in Curly Brace Format

The Complete ASBR2 configuration in Curly Brace Format

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