Hi, I'm studing for MPLS exam and after reading the documentation some aspects about MPLS-TE are still not clear . I hope you can help me to clarify some concepts: 1)Is RSVP a requirement on every router link of the ISP when we are using dynamic tunnel computation considering that a tunnel could change his path? 2)Is Constrant-based routing(CBR)used when the tunnel is configured using an explicit path? ... View more

HI, I'm studyng for MPLS exam and I wanted to create a small lab to recreate a scenario with overlapping MPLS-VPN to make some practice. I created the following physical topology: ACentral-\ $$$$$$$ /---BCentral SiteB2---Pe1--P--Pe2--SiteA2 SiteA1---/ $$$$$$$ \---SiteB1 The traffic flow should be the following: SiteA1---\ $$$$$$$ /----SiteB1 $$ | $$ACentral--BCentral$$ | $$ SiteA2---/ $$$$$$$ \----SiteB2 Notes: -Each customer spoke site cannot communicate directly with the other customers sites. -There are no restrictions for the intranet traffic. To accomplish those requirements, I created these VRFs on Pe1 (configuration on Pe2 is specular): ip vrf A rd 1:1 route-target export 1:1 route-target import 1:1 ! ip vrf AC !ip vrf BC (on Pe2) rd 1:123 ! rd 2:123 (on Pe2) route-target export 1:1 ! 2:2 on Pe2 route-target export 3:100 ! same on Pe2 route-target import 1:1 ! 2:2 on Pe2 route-target import 3:100 ! same on Pe2 ! ip vrf B rd 2:2 route-target export 2:2 route-target import 2:2 I expected that both PEs were able to reach every network of the other customer but probably something is missing. The problem is that BC's VRF on Pe2, exports routes learned from VRF B, using RT 2:2 only, without RT 3:100 and obviously VRF AC(on Pe1) does not import these routes and it doesn't have a reachability to B1 site. The same thing happens on Pe1, where VRF BC does not have routes for A1 site. Attached you can find the configuration of all P-Pe-Ce and some verification command Hope to receive your comments. Thanks in advance. Marco. PS IOS on all routers: c2600-telco-mz.123-26 ... View more