[MPLS para Dummies] BGP entre PE y CE

Este artículo forma parte de un grupo de artículos llamado MPLS para Dummies en el que se pretende dar una iniciación práctica de como  configurar una red MPLS básica. Si sigues los pasos uno a uno, con las configuraciones que aquí se presentan es imposible que no puedas montar tu propia red MPLS :) .

Configuración:

Si leíste el anterior artículo de este grupo de artículos verás que es hacer exactamente lo mismo que hacíamos con EIGR, pero ahora con BGP, e incluso más fácil ya que ni siquiera hay que hacer redistribuciones. Si no has leído el artículo te recomiendo que leas el grupo de artículos de MPLS para Dummies.

R9:

router bgp 9
 bgp log-neighbor-changes
 redistribute connected
 neighbor 192.168.49.4 remote-as 40905

R10:

router bgp 10
 bgp log-neighbor-changes
 redistribute connected
 neighbor 192.168.105.5 remote-as 40905

R4:

router bgp 40905
 address-family ipv4 vrf VPN910
  neighbor 192.168.49.9 remote-as 9
  neighbor 192.168.49.9 activate
 exit-address-family

R5:

router bgp 40905
 address-family ipv4 vrf VPN910
  neighbor 192.168.105.10 remote-as 10
  neighbor 192.168.105.10 activate
 exit-address-family

Verificación:

Fácil y para toda la familia J .

R9:

R9#show 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
      100.0.0.0/32 is subnetted, 2 subnets
C        100.0.0.9 is directly connected, Loopback0
B        100.0.0.10 [20/0] via 192.168.49.4, 00:00:13
      192.168.49.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.49.0/24 is directly connected, Ethernet0/0.49
L        192.168.49.9/32 is directly connected, Ethernet0/0.49
B     192.168.105.0/24 [20/0] via 192.168.49.4, 00:00:13


R9#ping 100.0.0.10
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 100.0.0.10, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 3/5/7 ms

 R10:

R10#show 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
      100.0.0.0/32 is subnetted, 2 subnets
B        100.0.0.9 [20/0] via 192.168.105.5, 00:11:30
C        100.0.0.10 is directly connected, Loopback0
B     192.168.49.0/24 [20/0] via 192.168.105.5, 00:11:30
      192.168.105.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.105.0/24 is directly connected, Ethernet0/0.105
L        192.168.105.10/32 is directly connected, Ethernet0/0.105


R10#ping 100.0.0.9
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 100.0.0.9, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 2/3/5 ms

R4:

 R4# show ip route vrf VPN910
Routing Table: VPN910
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
      100.0.0.0/32 is subnetted, 2 subnets
B        100.0.0.9 [20/0] via 192.168.49.9, 00:15:46
B        100.0.0.10 [200/0] via 100.0.0.5, 00:14:58
      192.168.49.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.49.0/24 is directly connected, Ethernet0/0.49
L        192.168.49.4/32 is directly connected, Ethernet0/0.49
B     192.168.105.0/24 [200/0] via 100.0.0.5, 00:14:58

R5:

R5#show ip route vrf VPN910
Routing Table: VPN910
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
      100.0.0.0/32 is subnetted, 2 subnets
B        100.0.0.9 [200/0] via 100.0.0.4, 00:16:33
B        100.0.0.10 [20/0] via 192.168.105.10, 00:15:45
B     192.168.49.0/24 [200/0] via 100.0.0.4, 00:16:33
      192.168.105.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.105.0/24 is directly connected, Ethernet0/0.105
L        192.168.105.5/32 is directly connected, Ethernet0/0.105