MPLS LAB - PE to CE routing - EIGRP (same AS PE-CE)
January 14th, 2009 in
CCIE SP,
Security | tags:
EIGRP,
MPLS In this post I will show how to configure EIGRP as the PE to CE routing protocol. The network used is the same as used in the rest of this series. You can see it below again :
In this first example we are going to use the same AS number between the PE and CE router for EIGRP.
When using the same AS between the PE and CE router internal routes from one VPN site will be remain internal routes in other VPN sites.
When using the same AS between the PE and CE router external routes will remain external routes.
We are only going to configure VPN_A since the configuration for VPN_B is pretty much the same.
router R3’s config :
R3 :
|
|
|
router eigrp 21047
no auto-summary
!
address-family ipv4 vrf VPN_A
redistribute bgp 100 metric 10000 1 255 1 1500
network 37.37.37.3 0.0.0.0
no auto-summary
autonomous-system 21047
exit-address-family
!
router bgp 100
no synchronization
bgp router-id 3.3.3.3
bgp log-neighbor-changes
neighbor 6.6.6.6 remote-as 100
neighbor 6.6.6.6 update-source Loopback0
no auto-summary
!
address-family ipv4 vrf VPN_A
redistribute eigrp 21047
no auto-summary
no synchronization
exit-address-family
|
router R7’s config :
R7:
|
|
|
router eigrp 21047
redistribute connected metric 10000 1 255 1 1500 route-map LO1
network 7.7.7.7 0.0.0.0
network 37.37.37.7 0.0.0.0
no auto-summary
!
route-map LO1 permit 10
match interface Loopback1
!
interface Loopback1
ip address 77.77.77.77 255.255.255.255
|
Notice that I created a loopback 1 to show that redistributed routes (External routes) remain external on the other side of the VPN.
router R6’s config :
R6 :
|
|
|
router eigrp 21047
no auto-summary
!
address-family ipv4 vrf VPN_A
redistribute bgp 100 metric 10000 1 255 1 1500
network 61.61.61.6 0.0.0.0
no auto-summary
autonomous-system 21047
exit-address-family
!
router bgp 100
no synchronization
bgp router-id 6.6.6.6
bgp log-neighbor-changes
neighbor 3.3.3.3 remote-as 100
neighbor 3.3.3.3 update-source Loopback0
no auto-summary
!
address-family ipv4 vrf VPN_A
redistribute eigrp 21047
no auto-summary
no synchronization
exit-address-family
|
router R11’s config :
R11 :
|
|
|
router eigrp 21047
network 11.11.11.11 0.0.0.0
network 61.61.61.11 0.0.0.0
no auto-summary
|
Now let’s do a “sh ip route” on R11 :
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 not set
37.0.0.0/24 is subnetted, 1 subnets
D 37.37.37.0 [90/30720] via 61.61.61.6, 00:13:12, FastEthernet2/0
7.0.0.0/32 is subnetted, 1 subnets
D 7.7.7.7 [90/158720] via 61.61.61.6, 00:13:12, FastEthernet2/0
77.0.0.0/32 is subnetted, 1 subnets
D EX 77.77.77.77 [170/261376] via 61.61.61.6, 00:09:45, FastEthernet2/0
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
|
As you can see above the internal EIGRP routes remain internal and the external route (the redistributed route from router R7’s loopback 1 interface) remains
external when using EIGRP with the same AS number between the PE and CE at different VPN sites.
In the next post I will show the configuration of EIGRP as the PE to CE routing protocol with different AS numbers.
Buy:Propecia.Zithromax.Tramadol.VPXL.Soma.Levitra.Cialis Super Active+.Viagra Professional.Super Active ED Pack.Cialis Professional.Viagra.Viagra Super Active+.Maxaman.Viagra Soft Tabs.Viagra Super Force.Cialis.Cialis Soft Tabs….