vpnv4 routes reflection over RR to RR clients in MPLS domain

[paratrooper]

Hi guys 

im trying to understand how Cisco MPLS networks works 

to do so i use )) GNS3

i built quite a simple topology below 

So IOU9 and IOU10 advertises networks 9.9.9.9/32 and 100.100.100.100/32 

they should be able to ping each other.

On IOU5 and IOU10 there are vrf_a with similar route-tagret

IOU5 and IOU10 and RR clients of IOU11 which is the router reflector

IOU6 and IOU7 are P devices with no any BGP

so i have the routes reflected on on both IOU5 and IOU8 and i can see respective routes in the routing tables of vrf_a

also i can see the corresponding routes on IOU9 and IOU10 

but when im trying to ping from IOU9 to IOU10 and viseversa it fails 

looks somehting wrong with labes 

could some one help me 

thanks 

PS in the attachments you can find config files 

thanks 

[Harold Ritter]

You do not have LDP enabled on IOU5 e1/0, IOU8 e1/1, IOU11 e1/0 and e1/1. Replace "mpls bgp forwarding" by "mpls ip" on these interfaces and that should fix the issue.

Regards,

[paratrooper]

hello

i intentionally didn't enable ldp on the interfaces faced to IOU11 since in this 

case traffic will be forwarded over IOU11

i need IOU11 to be just a route reflector, but the traffic should be forwarded through P devices like below

IOU5 <----> IOU6 <----> IOU7 <----->IOU8

[Harold Ritter · Accepted solution]

The path through IOU11 is the shortest in your scenario and therefore is chosen, whether LDP is enabled or not. If you want traffic to be forwarded via the lower path (IOU5 <----> IOU6 <----> IOU7 <----->IOU8), you need to increase the metric on the path through the RR (IOU11).

Regards,

[paratrooper]

hello
thanks
ip ospf cost solves the issue
thanks for you help