MPLS - EIGRP L3 VPN

 

image

We will build this post on the previous lab MPLS - RIP L3 VPN 

Instead of using RIP for CUST_A VRF we will be using EIGRP

we will enable EIGRP on both R1 and R5

R1

router eigrp 100
 network 0.0.0.0
 no auto-summary

R5

router eigrp 100
 network 0.0.0.0
 no auto-summary

now let’s enable the EIGRP on the PEs for VRF CUST_A

R2

router eigrp 100
 auto-summary
 !
 address-family ipv4 vrf CUST_A
    network 0.0.0.0
  no auto-summary
  autonomous-system 100

R4

router eigrp 50
 no auto-summary
 !
 address-family ipv4 vrf CUST_A
  network 0.0.0.0
  no auto-summary
  autonomous-system 50

As we can see that autonomous system has to be configured under the address family in EIGRP, the autonomous system number has to match the client’s AS for EIGRP neighbor to be up

now let’s mutual redistribute between the BGP-MP and EIGRP on both R2 and R4

R2

router eigrp 100
 no auto-summary
 !
 address-family ipv4 vrf CUST_A
  redistribute bgp 100 metric 1500 10 255 1 1500
router bgp 100
address-family ipv4 vrf CUST_A
redistribute eigrp 100

R4

router eigrp 50
 no auto-summary
 !
 address-family ipv4 vrf CUST_A
  redistribute bgp 100 metric 1500 10 255 1 1500
router bgp 100
address-family ipv4 vrf CUST_A
redis eigrp 50

We can see that that MPLS is working as expected from the output of R1 and R5

R1(config-router)#do sh ip route eigr
     5.0.0.0/24 is subnetted, 1 subnets
D EX    5.5.5.0 [170/1734656] via 10.1.12.2, 00:27:01, FastEthernet0/0
     10.0.0.0/24 is subnetted, 2 subnets
D EX    10.1.45.0 [170/1734656] via 10.1.12.2, 00:27:01, FastEthernet0/0

and R5

R5(config-router)#do sh ip route eig
     1.0.0.0/24 is subnetted, 1 subnets
D EX    1.1.1.0 [170/1734656] via 10.1.45.4, 00:36:47, FastEthernet0/0
     10.0.0.0/24 is subnetted, 2 subnets
D EX    10.1.12.0 [170/1734656] via 10.1.45.4, 00:36:47, FastEthernet0/0

 

R5(config-router)#do trace 1.1.1.1

Type escape sequence to abort.
Tracing the route to 1.1.1.1

  1 10.1.45.4 36 msec 48 msec 24 msec
  2 10.1.34.3 [MPLS: Labels 18/18 Exp 0] 48 msec 84 msec 76 msec
  3 10.1.12.2 [MPLS: Label 18 Exp 0] 72 msec 52 msec 48 msec
  4 10.1.12.1 64 msec *  96 msec

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