MPLS L3VPN dengan OSPF pada Cisco

Assalamualaikum wr wb

Alhamdulillah sampai saat ini kita masih diberikan kesempatan unutk sharing tentang tekologi terutama cisco melanjutkan materi yang kemaring, kali ini juga yaitu yang menggunakan static kali ini kita menggunakan ospf sebagai routing protokolnya.

pada lab ini adalah lab baru jadi kita mulai konfigurasi IP address di semua router mulai dari router 1

R1(config)#int lo0
R1(config-if)#ip addr 1.1.1.1 255.255.255.255
R1(config-if)#int fa0/0
R1(config-if)#no sh
R1(config-if)#mpls ip
R1(config-if)#ip addr 12.12.12.1 255.255.255.0
R1(config-if)#ex

R2(config)#int lo0
R2(config-if)#ip add 2.2.2.2 255.255.255.255
R2(config-if)#int fa0/0
R2(config-if)#mpls ip
R2(config-if)#ip add 12.12.12.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#int fa1/0
R2(config-if)#ip add 23.23.23.2 255.255.255.0
R2(config-if)#mpls ip
R2(config-if)#no sh

R3(config-router)#int lo0
R3(config-if)#ip add 3.3.3.3 255.255.255.255
R3(config-if)#int fa0/0
R3(config-if)#mpls ip
R3(config-if)#ip addr 23.23.23.3 255.255.255.0
R3(config-if)#no sh

R4(config)#int lo0
R4(config-if)#ip addr 4.4.4.4 255.255.255.255
R4(config-if)#int fa0/0
R4(config-if)#ip add 10.10.10.2 255.255.255.0
R4(config-if)#no sh

R5(config)#int lo0
R5(config-if)#ip add 5.5.5.5 255.255.255.255
R5(config-if)#int fa0/0
R5(config-if)#no sh
R5(config-if)#ip add 10.10.10.2 255.255.255.0
R5(config-if)#ex

R6(config)#int lo0
R6(config-if)#no sh
R6(config-if)#ip addr 6.6.6.6 255.255.255.255
R6(config-if)#int fa0/0
R6(config-if)#no sh
R6(config-if)#ip add 20.20.20.2 255.255.255.0
R6(config-if)#ex

R7(config)#int lo0
R7(config-if)#ip add 7.7.7.7 255.255.255.255
R7(config-if)#int fa0/0
R7(config-if)#no sh
R7(config-if)#ip add 20.20.20.2 255.255.255.0

Kemudian kita konfigurasi VRF di router 1 dan router 2

R1(config)#ip vrf atas
R1(config-vrf)#rd 10:1
R1(config-vrf)#route-target both 10:1
R1(config-vrf)#exi
R1(config)#ip vrf bawah
R1(config-vrf)#rd 10:2
R1(config-vrf)#route-target both 10:2
R1(config-vrf)#exi
R1(config)#int fa1/0
R1(config-if)#ip vrf forwarding atas
R1(config-if)#ip add 10.10.10.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#int fa1/1
R1(config-if)#ip vrf forwarding bawah
R1(config-if)#ip add 10.10.10.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#ex

setelah itu konfigurasi yang sama di router 3

R3(config)#ip vrf atas
R3(config-vrf)#rd 10:1
R3(config-vrf)#route-target both 10:1
R3(config-vrf)#exi
R3(config)#ip vrf bawah
R3(config-vrf)#rd 10:2
R3(config-vrf)#route-target both 10:2
R3(config-vrf)#exi
R3(config)#int fa1/0
R3(config-if)#ip vrf forwarding atas
R3(config-if)#ip addr 20.20.20.1 255.255.255.0
R3(config-if)#no sh
R3(config-if)#int fa1/1
R3(config-if)#ip vrf forwarding bawah
R3(config-if)#ip addr 20.20.20.1 255.255.255.0
R3(config-if)#no sh

Kemudian konfigurasi MBGP, sedikit tentang MBGP, MBGP adalah kepanjangan dari Multi Protocol BGP, berfungsi untuk mendistribusikan informasi Routing pada VRF antar Router PE, informasi Routing berupa VPNv4 yang terdapat RD pada tiap prefix untuk membedakan antara VRF satu dengan VRF lainnya. Antar Router PE di topologi ini akan dihubungkan dengan iBGP dan VPNv4, berikut ini adalah konfigurasinya :

R1(config)#router bgp 10
R1(config-router)#no sy
R1(config-router)#no au
R1(config-router)#nei 3.3.3.3 remote-as 10
R1(config-router)#nei 3.3.3.3 update-source lo0
R1(config-router)#address-family vpnv4
R1(config-router-af)#nei 3.3.3.3 ac
R1(config-router-af)#exi
R1(config-router)#address-family ipv4 vrf atas
R1(config-router-af)#redistribute connected
R1(config-router-af)#redistribute ospf 10 vrf atas metric 10
R1(config-router-af)#exi
R1(config-router)#address-family ipv4 vrf bawah
R1(config-router-af)#redistribute connected
R1(config-router-af)#redistribute ospf 20 vrf bawah metric 10
R1(config-router-af)#exi

R3(config)#router bgp 10
R3(config-router)#nei 1.1.1.1 remote-as 10
R3(config-router)#nei 1.1.1.1 update-source lo0
R3(config-router)#address-family vpnv4
R3(config-router-af)#nei 1.1.1.1 activate
R3(config-router-af)#exi
R3(config-router)#address-family ipv4
R3(config-router-af)#exi
R3(config-router)#address-family ipv4 vrf atas
R3(config-router-af)#redistribute ospf 10 vrf atas metric 10
R3(config-router-af)#redistribute connected
R3(config-router-af)#exi
R3(config-router)#address-family ipv4 vrf bawah
R3(config-router-af)#redistribute connected
R3(config-router-af)#redistribute ospf 20 vrf bawah metric 10
R3(config-router-af)#exi

kemudian kita konfigurasi di router 3 routing eigrp, ingat hanya di network 12.12.12.0/24 dan 1.1.1.1/32

R1(config)#router eigrp 10
R1(config-router)#no au
R1(config-router)#net 12.12.12.0 0.0.0.255
R1(config-router)#net 1.1.1.1 0.0.0.0

kemudian di router 2

R2(config)#router eigrp 10
R2(config-router)#net 2.2.2.2 0.0.0.0
R2(config-router)#net 12.12.12.0 0.0.0.255
R2(config-router)#net 23.23.23.0 0.0.0.255
R2(config-router)#no au

kemudian di router 3 kita konfigruasi dirouter 3 hanya network 23.23.23.0/24 dan 3.3.3.3/32

R3(config)#router ei 10
R3(config-router)#no au
R3(config-router)#net 3.3.3.3 0.0.0.0
R3(config-router)#net 23.23.23.0 0.0.0.255

kemudian kita konfigura vrf ospf di routter 1 dan di router 2

R1(config)#router ospf 10 vrf atas
R1(config-router)#net 10.10.10.0 0.0.0.255 ar 0
R1(config-router)#redistribute bgp 10 subnets
R1(config-router)#exi
R1(config)#router ospf 20 vrf bawah
R1(config-router)#router-id 10.2.2.2
R1(config-router)#net 10.10.10.0 0.0.0.255 ar 0
R1(config-router)#redistribute bgp 10 subnets
R1(config-router)#ex

Setelah itu di router 3

R3(config)#router ospf 10 vrf atas
R3(config-router)#net 20.20.20.0 0.0.0.255 ar 0
R3(config-router)#redistribute bgp 10 subnets
R3(config-router)#ex
R3(config)#router ospf 20 vrf bawah
R3(config-router)#router-id 20.2.2.2
R3(config-router)#net 20.20.20.0 0.0.0.255 ar 0
R3(config-router)#redistribute bgp 10 subnets
R3(config-router)#exi

Kemudian kita cek tabel routingnya

R7(config)#do sh ip route
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
       + - replicated route, % - next hop override

Gateway of last resort is not set

      5.0.0.0/32 is subnetted, 1 subnets
O IA     5.5.5.5 [110/11] via 20.20.20.1, 00:02:02, FastEthernet0/0
      7.0.0.0/32 is subnetted, 1 subnets
C        7.7.7.7 is directly connected, Loopback0
      10.0.0.0/24 is subnetted, 1 subnets
O IA     10.10.10.0 [110/2] via 20.20.20.1, 00:02:02, FastEthernet0/0
      20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        20.20.20.0/24 is directly connected, FastEthernet0/0
L        20.20.20.2/32 is directly connected, FastEthernet0/0
R7(config)#

kemudian kita coba ping antar CE

R7(config)#do ping 5.5.5.5 source lo0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.5, timeout is 2 seconds:
Packet sent with a source address of 7.7.7.7
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 44/49/60 ms
R7(config)#