In an interesting survey presented at MPLS 2010, Cariden, a vendor of provisioning and traffic engineering tools, describes the current deployments of MPLS. The survey mentions several interesting results :

• the three major MPLS vendors are Cisco, Juniper and Alcatel Lucent, more than 15% of the networks are multivendor
• 57% of the networks uses IS-IS, the others use OSPF
• about two thirds of the networks use RSVP-TE even more in Juniper-only networks. The motivations for RSVP-TE are
• Traffic engineering
  • Mismatched Capacities in Asia
  • Expensive Cross-Oceanic Links
  • N:1 Backup
  • Tactical TE
• 25% of the networks have more than 15k LSPs
• 60% of the networks that use RSVP-TE use CSPF to compute the paths of the LSPs, the others rely on offline path computation