Month: January 2026

We have already done a lab with IS-IS and Unnumbered Interfaces so with this lab we will do the same but with OSPF instead of IS-IS.

The lab is EVPN E-Tree on Junos Evolved. New York is the Head Office (root) and the other sites are satellites (leaves).

https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/concept/evpn-etree-overview.html

PE1

set system host-name pe1
set interfaces et-0/0/0 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/0 unit 0 family iso
set interfaces et-0/0/0 unit 0 family mpls
set interfaces et-0/0/1 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/1 unit 0 family iso
set interfaces et-0/0/1 unit 0 family mpls
set interfaces et-0/0/2 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/2 unit 0 family iso
set interfaces et-0/0/2 unit 0 family mpls
set interfaces et-0/0/3 flexible-vlan-tagging
set interfaces et-0/0/3 encapsulation flexible-ethernet-services
set interfaces et-0/0/3 unit 202 encapsulation vlan-bridge
set interfaces et-0/0/3 unit 202 vlan-id 202
set interfaces et-0/0/3 unit 202 etree-ac-role root
set interfaces lo0 unit 0 family inet address 5.5.5.5/32
set interfaces lo0 unit 0 family iso address 49.0000.5555.0000.0000.00
set interfaces lo0 unit 0 family mpls
set routing-instances NEWYORK instance-type mac-vrf
set routing-instances NEWYORK protocols evpn evpn-etree
set routing-instances NEWYORK service-type vlan-aware
set routing-instances NEWYORK interface et-0/0/3.202
set routing-instances NEWYORK route-distinguisher 5.5.5.5:202
set routing-instances NEWYORK vrf-target target:65400:202
set routing-instances NEWYORK vlans NY202 vlan-id 202
set routing-instances NEWYORK vlans NY202 interface et-0/0/3.202
set routing-options router-id 5.5.5.5
set routing-options autonomous-system 65400
set protocols bgp group EVPN type internal
set protocols bgp group EVPN local-address 5.5.5.5
set protocols bgp group EVPN family evpn signaling
set protocols bgp group EVPN neighbor 9.9.9.9
set protocols mpls interface et-0/0/0.0
set protocols mpls interface et-0/0/1.0
set protocols mpls interface lo0.0
set protocols ospf source-packet-routing node-segment ipv4-index 600
set protocols ospf source-packet-routing srgb start-label 70000
set protocols ospf source-packet-routing srgb index-range 1000
set protocols ospf area 0.0.0.0 interface et-0/0/1.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/0.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/2.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface lo0.0 passive

PE2

set system host-name pe2
set interfaces et-0/0/0 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/0 unit 0 family iso
set interfaces et-0/0/0 unit 0 family mpls
set interfaces et-0/0/1 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/1 unit 0 family iso
set interfaces et-0/0/1 unit 0 family mpls
set interfaces et-0/0/2 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/2 unit 0 family iso
set interfaces et-0/0/2 unit 0 family mpls
set interfaces et-0/0/3 flexible-vlan-tagging
set interfaces et-0/0/3 encapsulation flexible-ethernet-services
set interfaces et-0/0/3 unit 202 encapsulation vlan-bridge
set interfaces et-0/0/3 unit 202 vlan-id 202
set interfaces et-0/0/3 unit 202 etree-ac-role leaf
set interfaces lo0 unit 0 family inet address 6.6.6.6/32
set interfaces lo0 unit 0 family iso address 49.0000.6666.0000.0000.00
set interfaces lo0 unit 0 family mpls
set routing-instances NEWYORK instance-type mac-vrf
set routing-instances NEWYORK protocols evpn evpn-etree
set routing-instances NEWYORK service-type vlan-aware
set routing-instances NEWYORK interface et-0/0/3.202
set routing-instances NEWYORK route-distinguisher 6.6.6.6:202
set routing-instances NEWYORK vrf-target target:65400:202
set routing-instances NEWYORK vlans NY202 vlan-id 202
set routing-instances NEWYORK vlans NY202 interface et-0/0/3.202
set routing-options router-id 6.6.6.6
set routing-options autonomous-system 65400
set protocols bgp group EVPN type internal
set protocols bgp group EVPN local-address 6.6.6.6
set protocols bgp group EVPN family evpn signaling
set protocols bgp group EVPN neighbor 9.9.9.9
set protocols mpls interface et-0/0/0.0
set protocols mpls interface et-0/0/1.0
set protocols mpls interface lo0.0
set protocols ospf source-packet-routing node-segment ipv4-index 601
set protocols ospf source-packet-routing srgb start-label 70000
set protocols ospf source-packet-routing srgb index-range 1000
set protocols ospf area 0.0.0.0 interface et-0/0/1.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/0.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/2.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface lo0.0 passive

PE3

set system host-name pe3
set interfaces et-0/0/0 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/0 unit 0 family iso
set interfaces et-0/0/0 unit 0 family inet6
set interfaces et-0/0/0 unit 0 family mpls
set interfaces et-0/0/1 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/1 unit 0 family iso
set interfaces et-0/0/1 unit 0 family inet6
set interfaces et-0/0/1 unit 0 family mpls
set interfaces et-0/0/2 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/2 unit 0 family iso
set interfaces et-0/0/2 unit 0 family inet6
set interfaces et-0/0/2 unit 0 family mpls
set interfaces et-0/0/3 flexible-vlan-tagging
set interfaces et-0/0/3 encapsulation flexible-ethernet-services
set interfaces et-0/0/3 unit 202 encapsulation vlan-bridge
set interfaces et-0/0/3 unit 202 vlan-id 202
set interfaces et-0/0/3 unit 202 etree-ac-role leaf
set interfaces lo0 unit 0 family inet address 7.7.7.7/32
set interfaces lo0 unit 0 family iso address 49.0000.7777.0000.0000.00
set interfaces lo0 unit 0 family mpls
set routing-instances NEWYORK instance-type mac-vrf
set routing-instances NEWYORK protocols evpn evpn-etree
set routing-instances NEWYORK service-type vlan-aware
set routing-instances NEWYORK interface et-0/0/3.202
set routing-instances NEWYORK route-distinguisher 7.7.7.7:202
set routing-instances NEWYORK vrf-target target:65400:202
set routing-instances NEWYORK vlans NY202 vlan-id 202
set routing-instances NEWYORK vlans NY202 interface et-0/0/3.202
set routing-options router-id 7.7.7.7
set routing-options autonomous-system 65400
set protocols bgp group EVPN type internal
set protocols bgp group EVPN local-address 7.7.7.7
set protocols bgp group EVPN family evpn signaling
set protocols bgp group EVPN neighbor 9.9.9.9
set protocols mpls interface et-0/0/0.0
set protocols mpls interface et-0/0/1.0
set protocols mpls interface lo0.0
set protocols ospf source-packet-routing node-segment ipv4-index 602
set protocols ospf source-packet-routing srgb start-label 70000
set protocols ospf source-packet-routing srgb index-range 1000
set protocols ospf area 0.0.0.0 interface et-0/0/1.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/0.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/2.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface lo0.0 passive

PE4

set system host-name pe4
set interfaces et-0/0/0 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/0 unit 0 family iso
set interfaces et-0/0/0 unit 0 family mpls
set interfaces et-0/0/1 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/1 unit 0 family iso
set interfaces et-0/0/1 unit 0 family mpls
set interfaces et-0/0/2 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/2 unit 0 family iso
set interfaces et-0/0/2 unit 0 family mpls
set interfaces et-0/0/3 flexible-vlan-tagging
set interfaces et-0/0/3 encapsulation flexible-ethernet-services
set interfaces et-0/0/3 unit 202 encapsulation vlan-bridge
set interfaces et-0/0/3 unit 202 vlan-id 202
set interfaces et-0/0/3 unit 202 etree-ac-role leaf
set interfaces lo0 unit 0 family inet address 8.8.8.8/32
set interfaces lo0 unit 0 family iso address 49.0000.8888.0000.0000.00
set interfaces lo0 unit 0 family mpls
set routing-instances NEWYORK instance-type mac-vrf
set routing-instances NEWYORK protocols evpn evpn-etree
set routing-instances NEWYORK service-type vlan-aware
set routing-instances NEWYORK interface et-0/0/3.202
set routing-instances NEWYORK route-distinguisher 8.8.8.8:202
set routing-instances NEWYORK vrf-target target:65400:202
set routing-instances NEWYORK vlans NY202 vlan-id 202
set routing-instances NEWYORK vlans NY202 interface et-0/0/3.202
set routing-options router-id 8.8.8.8
set routing-options autonomous-system 65400
set protocols bgp group EVPN type internal
set protocols bgp group EVPN local-address 8.8.8.8
set protocols bgp group EVPN family evpn signaling
set protocols bgp group EVPN neighbor 9.9.9.9
set protocols mpls interface et-0/0/0.0
set protocols mpls interface et-0/0/1.0
set protocols mpls interface lo0.0
set protocols ospf source-packet-routing node-segment ipv4-index 603
set protocols ospf source-packet-routing srgb start-label 70000
set protocols ospf source-packet-routing srgb index-range 1000
set protocols ospf area 0.0.0.0 interface et-0/0/0.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/1.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/2.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface lo0.0 passive

RR

set system host-name rr
set interfaces et-0/0/0 unit 0 family inet
set interfaces et-0/0/1 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/1 unit 0 family iso
set interfaces et-0/0/1 unit 0 family mpls
set interfaces et-0/0/2 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/2 unit 0 family iso
set interfaces et-0/0/2 unit 0 family mpls
set interfaces et-0/0/3 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/3 unit 0 family iso
set interfaces et-0/0/3 unit 0 family mpls
set interfaces et-0/0/4 unit 0 family inet unnumbered-address lo0.0
set interfaces et-0/0/4 unit 0 family iso
set interfaces et-0/0/4 unit 0 family mpls
set interfaces et-0/0/6 unit 0 family inet
set interfaces et-0/0/8 unit 0 family inet
set interfaces et-0/0/9 unit 0 family inet
set interfaces et-0/0/10 unit 0 family inet
set interfaces et-0/0/11 unit 0 family inet
set interfaces lo0 unit 0 family inet address 9.9.9.9/32
set interfaces lo0 unit 0 family iso address 49.0000.9999.0000.0000.00
set routing-options resolution rib bgp.evpn.0 resolution-ribs inet.0
set routing-options router-id 9.9.9.9
set routing-options autonomous-system 65400
set protocols bgp group EVPN type internal
set protocols bgp group EVPN local-address 9.9.9.9
set protocols bgp group EVPN family evpn signaling
set protocols bgp group EVPN cluster 9.9.9.9
set protocols bgp group EVPN neighbor 5.5.5.5
set protocols bgp group EVPN neighbor 7.7.7.7
set protocols bgp group EVPN neighbor 6.6.6.6
set protocols bgp group EVPN neighbor 8.8.8.8
set protocols ospf area 0.0.0.0 interface et-0/0/1.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/2.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/3.0 interface-type p2p
set protocols ospf area 0.0.0.0 interface et-0/0/4.0 interface-type p2p

OSPF has been configured on all the CE devices and New York will have 3 neighbours. The other sites will only be neighbours with New York.