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42-86
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 42 Configuring IP Unicast Routing
Configuring Multi-VRF CE
Configure the loopback and physical interfaces on Switch A. Gigabit Ethernet port 1 is a trunk
connection to the PE. Gigabit Ethernet ports 8 and 11 connect to VPNs:
Switch(config)# interface loopback1
Switch(config-if)# ip vrf forward
ing v11
Switch(config-if)# ip address 8.8
.1.8 255.255.255.0
Switch(config-if)# exit
Switch(config)# interface loopbac
k2
Switch(config-if)# ip vrf forward
ing v12
Switch(config-if)# ip address 8.8
.2.8 255.255.255.0
Switch(config-if)# exit
Switch(config)# interface gigabit
ethernet1/0/5
Switch(config-if)# switchport tru
nk encapsulation dot1q
Switch(config-if)# switchport mod
e trunk
Switch(config-if)# no ip address
Switch(config-if)# exit
Switch(config)# interface gigabit
ethernet1/0/8
Switch(config-if)# switchport acc
ess vlan 208
Switch(config-if)# no ip address
Switch(config-if)# exit
Switch(config)# interface gigabit
ethernet1/0/11
Switch(config-if)# switchport tru
nk encapsulation dot1q
Switch(config-if)# switchport mod
e trunk
Switch(config-if)# no ip address
Switch(config-if)# exit
Configure the VLANs used on Switch A. VLAN 10 is used by VRF 11 between the CE and the PE.
VLAN 20 is used by VRF 12 between the CE and the PE. VLANs 118 and 208 are used for the VPNs
that include Switch F and Switch D, respectively:
Switch(config)# interface vlan10
Switch(config-if)# ip vrf forward
ing v11
Switch(config-if)# ip address 38.
0.0.8 255.255.255.0
Switch(config-if)# exit
Switch(config)# interface vlan20
Switch(config-if)# ip vrf forward
ing v12
Switch(config-if)# ip address 83.
0.0.8 255.255.255.0
Switch(config-if)# exit
Switch(config)# interface vlan118
Switch(config-if)# ip vrf forward
ing v12
Switch(config-if)# ip address 118
.0.0.8 255.255.255.0
Switch(config-if)# exit
Switch(config)# interface vlan208
Switch(config-if)# ip vrf forward
ing v11
Switch(config-if)# ip address 208
.0.0.8 255.255.255.0
Switch(config-if)# exit
Configure OSPF routing in VPN1 and VPN2.
Switch(config)# router ospf 1 vrf vl1
Switch(config-router)# redistribu
te bgp 800 subnets
Switch(config-router)# network 20
8.0.0.0 0.0.0.255 area 0
Switch(config-router)# exit
Switch(config)# router ospf 2 vrf
vl2
Switch(config-router)# redistribu
te bgp 800 subnets
Switch(config-router)# network 11
8.0.0.0 0.0.0.255 area 0
Switch(config-router)# exit