Easy Virtual Network lab 1.

Objetivo: probar parte de la configuraciones relacionadas con Easy Virtual Network (EVN).

Topología:

R1 Config:
!
hostname R1
!
/EVN vrf definition, diferente a la definida con el ip vrf.
vrf definition blue
/Assigns an EVN tag value.
vnet tag 1001
rd 1:1
!
/Declares carrying the IPv4 prefixes.
address-family ipv4
/Este comando permite introducir rutas de la vrf red en la blue. Esto es como inter-vnet routing.
route-replicate from vrf red unicast all
exit-address-family
!
vrf definition green
vnet tag 1003
rd 3:3
!
address-family ipv4
exit-address-family
!
vrf definition red
vnet tag 1002
rd 2:2
!
address-family ipv4
exit-address-family
!
/Aquí se declara el listado de VN que van a ser permitidos en el vnet trunk.
vrf list AllowBR
member blue
member red
!
interface Ethernet0/0
/Aquí se declara esta interfaz como vnet trunk y se limita el paso de las VNs solo a la blue y red.
vnet trunk list AllowBR
ip address 172.22.8.1 255.255.255.0
/Aquí se declaran atributos específicos para una VN en esta interfaz.
vnet name blue
ip ospf cost 40
!
vnet name red
ip ospf cost 50
!
!
interface Ethernet0/1
/Aquí se declara la pertenencia de la interfaz a una VN. Este comando es el mismo que se utiliza con VRF.
vrf forwarding blue
ip address 10.1.1.1 255.255.255.0
!
interface Ethernet0/2
vrf forwarding red
ip address 10.1.20.1 255.255.255.0
!
interface Ethernet0/3
vrf forwarding green
ip address 10.1.40.1 255.255.255.0
!
/Aquí se declara un proceso ospf para cada VN. Esta declaración de OSPF es igual a la utilizada en caso de VRF.
router ospf 1 vrf blue
capability vrf-lite
network 0.0.0.0 255.255.255.255 area 0
!
router ospf 2 vrf red
capability vrf-lite
network 0.0.0.0 255.255.255.255 area 0
!
router ospf 3 vrf green
capability vrf-lite
network 0.0.0.0 255.255.255.255 area 0
!

R2 config:
!
hostname R2
!
vrf definition blue
vnet tag 1001
rd 1:1
!
address-family ipv4
exit-address-family
!
vrf definition green
vnet tag 1003
rd 3:3
!
address-family ipv4
exit-address-family
!
vrf definition red
vnet tag 1002
rd 2:2
!
address-family ipv4
/Este comando permite introducir rutas de la vrf red en la blue. Esto es como inter-vnet routing.
route-replicate from vrf blue unicast all
exit-address-family
!
interface Loopback0
vrf forwarding blue
ip address 145.1.5.1 255.255.255.255
!
interface Ethernet0/0
vnet trunk
ip address 172.22.8.2 255.255.255.0
!
interface Ethernet0/1
vrf forwarding blue
ip address 145.1.1.1 255.255.255.0
!
interface Ethernet0/2
vrf forwarding red
ip address 145.1.20.1 255.255.255.0
!
interface Ethernet0/3
vrf forwarding green
ip address 145.1.40.1 255.255.255.0
!
router ospf 1 vrf blue
capability vrf-lite
network 0.0.0.0 255.255.255.255 area 0
!
router ospf 2 vrf red
capability vrf-lite
network 0.0.0.0 255.255.255.255 area 0
!
router ospf 3 vrf green
capability vrf-lite
network 0.0.0.0 255.255.255.255 area 0
!

Comprobación:

RA#routing-context vrf blue
RA%blue#sh ip route

Routing Table: blue
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

Gateway of last resort is not set

10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.1.1.0/24 is directly connected, Ethernet0/1
L 10.1.1.1/32 is directly connected, Ethernet0/1
C + 10.1.20.0/24 is directly connected (red), Ethernet0/2
L 10.1.20.1/32 is directly connected, Ethernet0/2
145.1.0.0/16 is variably subnetted, 3 subnets, 2 masks
O 145.1.1.0/24 [110/50] via 172.22.8.2, 03:41:13, Ethernet0/0.1001
O 145.1.5.1/32 [110/41] via 172.22.8.2, 03:41:13, Ethernet0/0.1001
O + 145.1.20.0/24 [110/60] via 172.22.8.2 (red), 03:39:03, Ethernet0/0.1002
172.22.0.0/16 is variably subnetted, 2 subnets, 2 masks
C 172.22.8.0/24 is directly connected, Ethernet0/0.1001
L 172.22.8.1/32 is directly connected, Ethernet0/0.1001

Nota: las rutas con el + son replicadas del proceso de enrutamiento de la VN red. Esto tiene como objetivo introducir enrutamiento entre diferentes VN.

RA%blue#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
145.1.5.1 1 FULL/BDR 00:00:38 172.22.8.2 Ethernet0/0.1001

RA%blue#sh ip ospf interface brief
Interface PID Area IP Address/Mask Cost State Nbrs F/C
Et0/1 1 0 10.1.1.1/24 10 DR 0/0
Et0/0.1001 1 0 172.22.8.1/24 10 DR 1/1

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Posted in EVN

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