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IP MPLS VPN and Cisco

  • From: Sebastien.Spas@alcatel.be
  • Date: Wed, 19 Mar 2003 19:28:26 +0100
  • Importance: Normal
  • Resent-Date: Wed, 19 Mar 2003 14:44:21 -0500
  • To: "Mpls-Ops@Mplsrc. Com" <mpls-ops@mplsrc.com>
  • X-MIMETrack: Itemize by SMTP Server on BEMAIL06/BE/ALCATEL(Release 5.0.11 |July 24, 2002) at03/19/2003 19:28:49,Serialize by Router on BEMAIL06/BE/ALCATEL(Release 5.0.11 |July 24, 2002) at03/19/2003 19:29:00,Serialize complete at 03/19/2003 19:29:00

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