Multiple CE to single PE on the same VPN

t.tashiro · ‎06-24-2004

Hi

I am looking into MPLS VPN's and I have successfully built a lab to test this.i.e. CE-PE-P-P-PE-CE, No problem

However I cannot find any sample configs to show how more that one CE belonging to the same VPN can be connected to the same PE. i.e. CE-PE-P-P-PE-CE

CE/

This may be very simple but I'm a newbie to MPLS VPN's so I'm not quite sure what to do.

Any help would be greatly appreciated

tomanderin · ‎06-24-2004

create the VRF with all the relevant configs, eg. RD, route targets, etc, & then share it between interfaces

t.tashiro · ‎06-24-2004

Hi

That's what I assume but I must be doing something wrong.

I would like to add another CE to serial 3 using BGP as PE-CE routing protocol with an AS of 65003 with the neighbour IP address of 172.16.20.4 which is in the same VPN as CUST_2 (serial 2)

What do I have to do?

Here is my config

PE2#sh run

Building configuration...

!

ip subnet-zero

!

ip vrf CUST_2

rd 8375:2

route-target export 8375:2

route-target import 8375:2

ip cef

no tag-switching ip propagate-ttl forwarded

!

interface Loopback0

ip address 192.168.192.254 255.255.255.255

!

interface Serial0

ip address 195.168.1.1 255.255.255.252

tag-switching ip

no fair-queue

!

interface Serial2

ip vrf forwarding CUST_2

ip address 172.16.20.1 255.255.255.252

!

interface Serial3

no ip address

shutdown

!

router ospf 1

log-adjacency-changes

network 195.14.64.0 0.0.31.255 area 0

!

router bgp 1

no synchronization

no bgp default ipv4-unicast

bgp log-neighbor-changes

neighbor 192.168.192.254 remote-as 1

neighbor 192.168.192.254 update-source Loopback0

neighbor 192.168.192.254 activate

!

address-family ipv4 vrf CUST_2

redistribute connected

neighbor 172.16.20.2 remote-as 65002

neighbor 172.16.20.2 activate

no auto-summary

no synchronization

exit-address-family

Any help is greatly appreciated

Cheers

Mark

olorunloba · ‎06-24-2004

Since the other CE is in the same VPN, they use the same vrf. Hence you have

interface Serial3

ip vrf forwarding CUST_2

ip address 172.16.20.5 255.255.255.252

.

router bgp 1

.

address-family ipv4 vrf CUST_2

redistribute connected

neighbor 172.16.20.2 remote-as 65002

neighbor 172.16.20.2 activate

neighbor 172.16.20.6 remote-as 65003

neighbor 172.16.20.6 activate

no auto-summary

no synchronization

exit-address-family

Note I assume that you meant to use 172.16.20.4 /30 subnet for the new client,where .5 is on the PE and .6 is on the CE.

t.tashiro · ‎06-25-2004

Doh!

I knew it would be something simple like that!!!!!!

Thanks for your help. Incidentally I noticed the 172.16.20.4/30 after I posted the message

Cheers

Mark