OSPF VRF to OPSF Global Route leaking Examples from PE to PE

Hi Guys ,

I got stuck in a situation where we need to take the Routes from OSPF VRF process to OPSF global via MPLS backbone to reach other networks across MPLS. We used the below Solution.

Scenario.

Servers—->PE1—–>P—–>PE2—–>Servers

PE1—————————OSPF ————————-PE2

PE1————————iBGP/MPLS——————-PE2

OSPF Global in PE1——————–> OSPFGlobal in PE2  AND OSPF  VRF in PE2

Below template used in PE2

OSPF VRF to OPSF Global Route leaking Examples from PE to PE
===========================================================
PE2 Side template
! // Adding the Static routes in the Global for pointing to the VRF BLUE , Vlan 106
!
ip route 10.16.26.0  255.255.255.0 Vlan106
ip route  10.16.4.20 255.255.255.252 Vlan106
ip route  10.16.22.0 255.255.255.0 Vlan106
ip route  10.16.23.0   255.255.255.0 Vlan106
ip route  10.16.24.0 255.255.255.0 Vlan106
ip route  10.16.25.0 255.255.255.0 Vlan106
ip route  10.16.26.0 255.255.255.0 Vlan106
!
// Injecting the Default Route in the VRF BLUE  pointing to Next Hop which is PE1 L3 MPLS Enabled Interface
!
ip route vrf BLUE  0.0.0.0 0.0.0.0  port-channel 6 172.16.10.1 global

// Port Channel 6 is L3 between PE1 and PE2. Global Key word is used to route from VRF to Global Routing.
====================================

// Allowing only the  VRF BLUE routes to be redistributed in the OSPF Global  to reach  via  OPSF Global to network behind PE1

// Controlling the Routes via Prefix List  to be advertised to other PEs

// Note: You can ignore the Prefix List/Route-map if you dont need to control the routes , as i have lot of routes  and requires only specific to be advertised .
!
ip prefix-list BLUE-RED-Routes   seq 10 permit 10.16.14.0/24
ip prefix-list BLUE-RED-Routes   seq 15 permit 10.16.22.0/24
ip prefix-list BLUE-RED-Routes  seq 20 permit 10.16.22.0/24
ip prefix-list BLUE-RED-Routes  seq 25 permit 10.16.23.0/24
ip prefix-list BLUE-RED-Routes  seq 30 permit 10.16.24.0/24
ip prefix-list BLUE-RED-Routes  seq 40 permit 10.16.25.0/24
ip prefix-list BLUE-RED-Routes  seq 50 permit 10.16.26.0/24
ip prefix-list BLUE-RED-Routes  seq 60 permit 10.16.28.0/24
ip prefix-list BLUE-RED-Routes  seq 70 permit 10.16.99.0/24
ip prefix-list BLUE-RED-Routes  seq 80 permit 10.16.57.0/24
ip prefix-list BLUE-RED-Routes  seq 90 permit 10.16.4.20/30

!
route-map RMP-BLUE-RED-Routes permit 10
match ip address prefix-list BLUE-RED-Routes

!
// Controlling Routes when redistributing static  in the Global OSPF process to be Advertised to other Side of PEs //

!
router ospf 100
redistribute static subnets route-map RMP-BLUE-RED-Routes

!

Now your networks behind PE1 should be able to reach Network behind PE2.

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