MPLS VPN over GRE Help !!!

[princesai]

hi all

I built a small topology on MPLS VPNS over GRE

my topology consist of 2 CE routers 2 PE routers and 2 P routers it is a flat topology where in P-P is running GRE TUNNEL and MPLS is running in PE1-P1 and P2- PE2

the running configs are as below

for PE1

.......................

hostname SE1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!
!
ip vrf CUS
rd 100:1
route-target export 1:100
route-target import 1:100
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 1.1.1.1 255.255.255.0
ip ospf network point-to-point
!
interface FastEthernet0/0
ip address 192.168.1.1 255.255.255.0
duplex auto
speed auto
mpls ip
!
interface FastEthernet0/1
ip vrf forwarding CUS
ip address 192.168.4.1 255.255.255.0
duplex auto
speed auto
!
router eigrp 1
auto-summary
!
address-family ipv4 vrf CUS
redistribute bgp 1 metric 20000 120 255 255 15000
network 192.168.4.0
no auto-summary
autonomous-system 100
exit-address-family
!
router ospf 1
log-adjacency-changes
network 1.1.1.0 0.0.0.255 area 0
network 192.168.1.0 0.0.0.255 area 0
!
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 2.2.2.2 remote-as 1
neighbor 2.2.2.2 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 2.2.2.2 activate
neighbor 2.2.2.2 send-community extended
exit-address-family
!
address-family ipv4 vrf CUS
redistribute eigrp 100
no synchronization
exit-address-family
!
ip http server
no ip http secure-server
!
!
!
!
!
mpls ldp router-id Loopback0
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

for p1

................

hostname P1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Tunnel0
ip address 10.1.1.1 255.255.255.0
ip ospf cost 10
ip ospf 1 area 0
mpls ip
tunnel source FastEthernet0/1
tunnel destination 192.168.2.2
!
interface FastEthernet0/0
ip address 192.168.1.2 255.255.255.0
duplex auto
speed auto
mpls ip
!
interface FastEthernet0/1
ip address 192.168.2.1 255.255.255.0
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 192.168.1.0 0.0.0.255 area 0
!
ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

for P2

.................

hostname P2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Tunnel0
ip address 10.1.1.2 255.255.255.0
ip ospf cost 10
ip ospf 1 area 0
mpls ip
tunnel source FastEthernet0/1
tunnel destination 192.168.2.1
!
interface FastEthernet0/0
ip address 192.168.3.2 255.255.255.0
duplex auto
speed auto
mpls ip
!
interface FastEthernet0/1
ip address 192.168.2.2 255.255.255.0
duplex auto
speed auto
!
router ospf 1
log-adjacency-changes
network 192.168.3.0 0.0.0.255 area 0
!
ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

for PE2

............

hostname SE2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!
!
ip vrf CUS
rd 100:1
route-target export 1:100
route-target import 1:100
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 2.2.2.2 255.255.255.0
ip ospf network point-to-point
!
interface FastEthernet0/0
ip address 192.168.3.1 255.255.255.0
duplex auto
speed auto
mpls ip
!
interface FastEthernet0/1
ip vrf forwarding CUS
ip address 192.168.5.1 255.255.255.0
duplex auto
speed auto
!
router eigrp 1
auto-summary
!
address-family ipv4 vrf CUS
redistribute bgp 1 metric 20000 120 255 255 15000
network 192.168.5.0
no auto-summary
autonomous-system 100
exit-address-family
!
router ospf 1
log-adjacency-changes
network 2.2.2.0 0.0.0.255 area 0
network 192.168.3.0 0.0.0.255 area 0
!
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 1.1.1.1 remote-as 1
neighbor 1.1.1.1 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 1.1.1.1 activate
neighbor 1.1.1.1 send-community extended
exit-address-family
!
address-family ipv4 vrf CUS
redistribute eigrp 100
no synchronization
exit-address-family
!
ip http server
no ip http secure-server
!
!
!
!
!
mpls ldp router-id Loopback0
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

for CE1

..............

hostname CE1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 3.3.3.3 255.255.255.0
!
interface FastEthernet0/0
ip address 192.168.4.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
router eigrp 100
network 3.0.0.0
network 192.168.4.0
no auto-summary
!
ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

for CE2

..............

hostname CE2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
!
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 4.4.4.4 255.255.255.0
!
interface FastEthernet0/0
ip address 192.168.5.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
router eigrp 100
network 4.0.0.0
network 192.168.5.0
no auto-summary
!
ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end

CE1 is attached to PE1 and CE2 is attached with PE2

my problem is when i try to ping from CE1 to CE2 my pings are getting failed but in the routing table i can see the routes of each other

I think their is a problem in My P routers

can any one help me in understanding and correct solution for this topology

[Mahesh Gohil · Accepted solution]

Hello Sai,

Weel I have tried the same and it is working with same topology..please see

CE2#ping 3.3.3.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 188/264/348 ms

CE1#ping 4.4.4.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 208/244/284 ms

Can you post output of below commands from different routers

PE1#sh mpls forwarding-table
Local  Outgoing      Prefix            Bytes Label   Outgoing   Next Hop
Label  Label or VC   or Tunnel Id      Switched      interface
16     No Label      3.3.3.0/24[V]     2280          Gi1/0      192.168.4.2
17     No Label      192.168.4.0/24[V] 1140          aggregate/CUS
18     Pop Label     10.1.1.0/24       0             Gi2/0      192.168.1.2
19     18            192.168.3.0/24    0             Gi2/0      192.168.1.2
20     19            2.2.2.0/24        0             Gi2/0      192.168.1.2

P1#sh mpls forwarding-table
Local  Outgoing      Prefix            Bytes Label   Outgoing   Next Hop
Label  Label or VC   or Tunnel Id      Switched      interface
16     Pop Label     1.1.1.0/24        6035          Gi1/0      192.168.1.1
18     Pop Label     192.168.3.0/24    0             Tu0        point2point
19     19            2.2.2.0/24        0             Tu0        point2point

P2#sh mpls forwarding-table
Local  Outgoing      Prefix            Bytes Label   Outgoing   Next Hop
Label  Label or VC   or Tunnel Id      Switched      interface
16     16            1.1.1.0/24        0             Tu0        point2point
17     Pop Label     192.168.1.0/24    0             Tu0        point2point
19     Pop Label     2.2.2.0/24        6781          Gi2/0      192.168.3.1

PE2#sh mpls forwarding-table
Local  Outgoing      Prefix            Bytes Label   Outgoing   Next Hop
Label  Label or VC   or Tunnel Id      Switched      interface
16     Pop Label     10.1.1.0/24       0             Gi1/0      192.168.3.2
17     16            1.1.1.0/24        0             Gi1/0      192.168.3.2
18     17            192.168.1.0/24    0             Gi1/0      192.168.3.2
19     No Label      192.168.5.0/24[V] 2280          aggregate/CUS
20     No Label      4.4.4.0/24[V]     1710          Gi2/0      192.168.5.2

Regards

Mahesh

[princesai]

Thank You Mahesh for your time can you please tell me which ios version you have used for this because i was using 3660 router and my pings dint worked can you please post your running configs as well so that it will be much helpfull for me thank you in advance

cheers,

Sai

[Mahesh Gohil · Accepted solution]

Hi sai,

I am using c7200-adventerprisek9-mz.124-24.T4.bin IOS

Please find config attached. Also you can post output of the commands may be i can help you.

Regards

Mahesh

[princesai]

Thank you mahesh it worked for me will be back with another problem