MPLS vpnv4 l3 network I am not getting routes from CE Router

[R Manjunatha]

Hi,

I created the VRF in PE router R38 AS5610 and similarly in PE router R35 AS 6520 and I configured the MP-BGP between the routes.

PE -R38 to CE-R76----- PE-R35 to CE-R82----

configured static route and redistributed to BGP

I am not getting the BGP route (82.82.82.0) from PE-R38

R38#sh ip route vrf F-1

Routing Table: F-1
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.10.76.0/24 is directly connected, Ethernet0/0
L 10.10.76.2/32 is directly connected, Ethernet0/0
76.0.0.0/24 is subnetted, 1 subnets
S 76.76.76.0 [1/0] via 10.10.76.1
R38

interface Loopback0
ip address 38.38.38.38 255.255.255.255
!
interface Ethernet0/0
vrf forwarding F-1
ip address 10.10.76.2 255.255.255.0
duplex auto
!
interface Ethernet0/1
ip address 10.10.38.1 255.255.255.0
duplex auto
mpls ip
!
interface Ethernet0/2
ip address 10.10.33.1 255.255.255.0
duplex auto
mpls ip
!
interface Ethernet0/3
no ip address
shutdown
duplex auto
!
interface Ethernet1/0
no ip address
shutdown
duplex auto
!
interface Ethernet1/1
no ip address
shutdown
duplex auto
!
interface Ethernet1/2
no ip address
shutdown
duplex auto
!
interface Ethernet1/3
no ip address
shutdown
duplex auto
!
router ospf 1
router-id 37.37.37.37
network 10.10.33.0 0.0.0.255 area 0
network 10.10.38.0 0.0.0.255 area 0
network 37.37.37.0 0.0.0.0 area 0
network 38.38.38.38 0.0.0.0 area 0
!
router bgp 6510
bgp router-id 38.38.38.38
bgp log-neighbor-changes
no bgp default ipv4-unicast
neighbor 75.75.75.75 remote-as 6510
neighbor 75.75.75.75 update-source Loopback0
!
address-family vpnv4
neighbor 75.75.75.75 activate
neighbor 75.75.75.75 send-community extended
neighbor 75.75.75.75 next-hop-self
exit-address-family
!
address-family ipv4 vrf F-1
redistribute connected
redistribute static
exit-address-family
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip route vrf F-1 76.76.76.0 255.255.255.0 10.10.76.1
!
ipv6 ioam timestamp
!
!
mpls ldp router-id Loopback0




R75

interface Loopback0
ip address 75.75.75.75 255.255.255.255
!
interface Ethernet0/0
ip address 10.10.32.2 255.255.255.0
duplex auto
mpls ip
!
interface Ethernet0/1
ip address 10.10.75.1 255.255.255.0
duplex auto
mpls ip
!
interface Ethernet0/2
ip address 10.75.75.1 255.255.255.0
duplex auto
mpls bgp forwarding
!
interface Ethernet0/3
no ip address
shutdown
duplex auto
!
router ospf 1
router-id 75.75.75.75
network 10.10.32.0 0.0.0.255 area 0
network 10.10.75.0 0.0.0.255 area 0
network 75.75.75.75 0.0.0.0 area 0
network 75.75.75.0 0.0.0.255 area 0
!
router bgp 6510
bgp router-id 75.75.75.75
bgp log-neighbor-changes
no bgp default ipv4-unicast
no bgp default route-target filter
neighbor 10.75.75.2 remote-as 6520
neighbor 38.38.38.38 remote-as 6510
neighbor 38.38.38.38 update-source Loopback0
!
address-family vpnv4
neighbor 10.75.75.2 activate
neighbor 10.75.75.2 send-community extended
neighbor 38.38.38.38 activate
neighbor 38.38.38.38 send-community extended
neighbor 38.38.38.38 next-hop-self
exit-address-family
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
ipv6 ioam timestamp
!
!
mpls ldp router-id Loopback0



R37

interface Loopback0
ip address 37.37.37.37 255.255.255.255
!
interface Ethernet0/0
ip address 10.10.37.1 255.255.255.0
duplex auto
mpls ip
!
interface Ethernet0/1
ip address 10.10.78.1 255.255.255.0
duplex auto
mpls ip
!
interface Ethernet0/2
ip address 10.75.75.2 255.255.255.0
duplex auto
mpls bgp forwarding
!
interface Ethernet0/3
no ip address
shutdown
duplex auto
!
router ospf 1
router-id 37.37.37.37
network 10.10.37.0 0.0.0.255 area 0
network 10.10.78.0 0.0.0.255 area 0
network 37.37.37.37 0.0.0.0 area 0
!
router bgp 6520
bgp router-id 37.37.37.37
bgp log-neighbor-changes
no bgp default ipv4-unicast
no bgp default route-target filter
neighbor 10.75.75.1 remote-as 6510
neighbor 35.35.35.35 remote-as 6520
neighbor 35.35.35.35 update-source Loopback0
!
address-family vpnv4
neighbor 10.75.75.1 activate
neighbor 10.75.75.1 send-community extended
neighbor 35.35.35.35 activate
neighbor 35.35.35.35 send-community extended
neighbor 35.35.35.35 next-hop-self
exit-address-family
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
ipv6 ioam timestamp
!
!
mpls ldp router-id Loopback0




 

R35

interface Loopback0
ip address 35.35.35.35 255.255.255.255
!
interface Ethernet0/0
ip address 10.10.34.2 255.255.255.0
duplex auto
mpls ip
!
interface Ethernet0/1
ip address 10.10.35.1 255.255.255.0
duplex auto
mpls ip
!
interface Ethernet0/2
vrf forwarding F-2
ip address 10.10.82.1 255.255.255.0
duplex auto
!
interface Ethernet0/3
no ip address
shutdown
duplex auto
!
interface Ethernet1/0
no ip address
shutdown
duplex auto
!
interface Ethernet1/1
no ip address
shutdown
duplex auto
!
interface Ethernet1/2
no ip address
shutdown
duplex auto
!
interface Ethernet1/3
no ip address
shutdown
duplex auto
!
router ospf 1
router-id 35.35.35.35
network 10.10.34.0 0.0.0.255 area 0
network 10.10.35.0 0.0.0.255 area 0
network 35.35.35.35 0.0.0.0 area 0
!
router bgp 6520
bgp router-id 35.35.35.35
bgp log-neighbor-changes
no bgp default ipv4-unicast
neighbor 37.37.37.37 remote-as 6520
neighbor 37.37.37.37 update-source Loopback0
!
address-family vpnv4
neighbor 37.37.37.37 activate
neighbor 37.37.37.37 send-community extended
neighbor 37.37.37.37 next-hop-self
exit-address-family
!
address-family ipv4 vrf F-2
redistribute connected
redistribute static
exit-address-family
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
ip route vrf F-2 82.82.82.0 255.255.255.0 10.10.82.2
!
ipv6 ioam timestamp
!
!
mpls ldp router-id Loopback0
!
control-plane

[R Manjunatha]

Gr8 ...I am able to see the BGP routes. what could be the issue 

R35#sh ip route vrf F-2

Routing Table: F-2
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
B 10.10.76.0/24 [200/0] via 37.37.37.37, 00:01:54
C 10.10.82.0/24 is directly connected, Ethernet0/2
L 10.10.82.1/32 is directly connected, Ethernet0/2
76.0.0.0/24 is subnetted, 1 subnets
B 76.76.76.0 [200/0] via 37.37.37.37, 00:01:54
82.0.0.0/24 is subnetted, 1 subnets
S 82.82.82.0 [1/0] via 10.10.82.2

[MHM Cisco World]

Your config was prefect,
only the router-id change 
and as @Harold Ritter mention you add some command in VRF 
NOW we need to force the BGP to accept the new change 
and 

clear ip bgp 
and no bgp default route-target filter 

do force the BGP to elect the best path and advertise it.

[Harold Ritter]

Hi @MHM Cisco World ,

Just applying the

address-family ipv4 vrf F-1

in the PE  was sufficient. There is no need to clear bgp in this case.

Regards,

[Harold Ritter · Accepted solution]

Hi @R Manjunatha ,

The issue was due to the missing

address-family vrf F-1

under BGP as per config you posted before.

R35(config-vrf)#do sh run vrf
Building configuration...

Current configuration : 284 bytes
vrf definition F-2
rd 100:1
route-target export 100:1
route-target import 100:1
!
address-family ipv4
exit-address-family
!
!
interface Ethernet0/2
vrf forwarding F-2
ip address 10.10.82.1 255.255.255.0
duplex auto
!
ip route vrf F-2 82.82.82.0 255.255.255.0 10.10.82.2
end

Regards,