The MPLS-OPS Archive

[Rajiv Asati <rajiva@cisco.com>]

Sebastien,
At 01:28 PM 3/19/2003, Sebastien.Spas@alcatel.be wrote:
>Hi,
>
>I saw recently a document talking about "limitations" while trying to do 
>Traffic-Engineering with MPLS VPN.
>
>1) The LSPs going from PE to PE beeing used for IP VPNs can only be LDP 
>signaled LSP (LDP messages always follow the IGP shortest path, then it's 
>not possible to perform any Traffic Engineering which requires RSVP 
>signalled LSPs)

That's not true.
MPLS TE tunnel between PEs is setup correctly using RSVP, you don't 
necessarily need LDP to be run neither on the

>
>2) Some vendors propose to provision an RSVP signalled LSP between the 2 P 
>closest to the PEs, and traffic-engineer that RSVP LSP. Then, the traffic 
>is processed through the initial LDP LSP, then thourgh that RSVP LSP using 
>label stacking.

If you have PE-P or P-P TE tunnels, then you need LDP to be run on the TE 
tunnels.

Cheers,
Rajiv

>
>
>Do you know if this is still the case with latest versions of Cisco and 
>Juniper equipment ?
>
>
>kind regards,
>sebastien.
>
>


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