MPLS LAB - PE to CE routing - Static routes
January 8th, 2009 in CCIE SP | tags: ,

In the previous posts in this series I explained how to setup the core network and how to configure VRF’s, in this post I will set-up PE to CE routing. There are various ways to set up PE to CE routing, in this example I will configure static-routing between the PE and CE routers.

Below is the diagram of our network again.

MPLS

For VPN_A we are going to route the network of 10.1.7.0/24 connected via router R7 and router R7’s loopback address of 7.7.7.7/32 and the loopback address of 11.11.11.11/32 which is the loopback address of router R11.

For VPN_B we are going to route the network of 10.1.8.0/24 connected via router R8 and router R7’s loopback address of 8.8.8.8/32 and the loopback address of 13.13.13.13/32 which is the loopback address of router R13.

Below is the configuration of this static routing for VPN_A on router R3:

R3 :


ip route vrf VPN_A 7.7.7.7 255.255.255.255 37.37.37.7
ip route vrf VPN_A 10.1.7.0 255.255.255.0 37.37.37.7

router bgp 100
 !
 address-family ipv4 vrf VPN_A
 redistribute connected
 redistribute static
 no auto-summary
 no synchronization
 exit-address-family

Below is the configuration of this static routing for VPN_A on router R6:

R6 :


ip route vrf VPN_A 11.11.11.11 255.255.255.255 61.61.61.11

router bgp 100
 !
address-family ipv4 vrf VPN_A
 redistribute connected
 redistribute static
 no auto-summary
 no synchronization
 exit-address-family

Below is the configuration of this static routing for VPN_B on router R3:

R3 :


ip route vrf VPN_B 13.13.13.13 255.255.255.255 31.31.31.13

router bgp 100
 !
 address-family ipv4 vrf VPN_B
 redistribute connected
 redistribute static
 no auto-summary
 no synchronization
 exit-address-family

Below is the configuration of this static routing for VPN_B on router R6:

R6 :


ip route vrf VPN_B 8.8.8.8 255.255.255.255 68.68.68.8
ip route vrf VPN_B 10.1.8.0 255.255.255.0 68.68.68.8

router bgp 100
 !
address-family ipv4 vrf VPN_B
 redistribute connected
 redistribute static
 no auto-summary
 no synchronization
 exit-address-family

On the CE routers we need to set up a default-route to the PE routers.

On router R7 :
ip route 0.0.0.0 0.0.0.0 37.37.37.3

On router R8 ;
ip route 0.0.0.0 0.0.0.0 68.68.68.6

On router R11 :
ip route 0.0.0.0 0.0.0.0 61.61.61.6

On router R13 :
ip route 0.0.0.0 0.0.0.0 31.31.31.3

Now let’s have a look at router’s R11 routing table and do a ping to 10.1.7.7 on router R7 :

R11 :


R11#sh ip route
Codes: 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

Gateway of last resort is 61.61.61.6 to network 0.0.0.0

     11.0.0.0/32 is subnetted, 1 subnets
C       11.11.11.11 is directly connected, Loopback0
     61.0.0.0/24 is subnetted, 1 subnets
C       61.61.61.0 is directly connected, FastEthernet2/0
S*   0.0.0.0/0 [1/0] via 61.61.61.6

R11#ping 10.1.7.7

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.7.7, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/82/148 ms

Now let’s have a look at router’s R8 routing table and to a ping to 13.13.13.13 on router R13 :

R8 :


R8#sh ip route
Codes: 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

Gateway of last resort is 68.68.68.6 to network 0.0.0.0

     68.0.0.0/24 is subnetted, 1 subnets
C       68.68.68.0 is directly connected, FastEthernet1/6
     8.0.0.0/32 is subnetted, 1 subnets
C       8.8.8.8 is directly connected, Loopback0
     10.0.0.0/24 is subnetted, 1 subnets
C       10.1.8.0 is directly connected, Loopback1
S*   0.0.0.0/0 [1/0] via 68.68.68.6
R8#ping 13.13.13.13

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 13.13.13.13, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/67/96 ms

In the next post I will configure RIPv2 as PE to CE routing protocol.

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