Before discussing the CE-LDP, lets explaint “constraint-based routing” term.
“Contraint-based Routing” is the routing which in which the routing process is done according to some constraints. Both QoS-based routing and policy-based routing belong to Contraint-based Routing. As you know these routing include QoS constraints or policy constraints.
CR-LDP (constraint-based LDP) contains extensions for LDP. And with these extensions, Contraint-based Routing is supported on LDP. In other words, Contraint-based Routing brings Traffic Engineering(TE) mechanism to the LDP.
The additional TLV parameters are new for CR-LDP:
Value Parameter ----- --------- 821 LSPID 822 ResCls 503 Optical Session Parameters 800 Explicit Route 801-804 ER-Hop TLVS 810 Traffic Parameters 820 Preemption 823 Route Pinning 910 Optical Interface Type 920 Optical Trail Desc 930 Optical Label 940 Lambada Set
MPLS Label Distribution Protocol, LDP – Part 1
MPLS Label Distribution Protocol, LDP – Part 2
MPLS Label Distribution Protocol, LDP – Part 3 (Configuration on ALU)
MPLS Label Distribution Protocol, LDP – Part 4 (ECMP)
MPLS Label Distribution Protocol, LDP – Part 5 (Export and Import Policy, Prefix Aggregation)
MPLS Label Distribution Protocol, LDP – Part 6 (T-LDP)
MPLS Label Distribution Protocol, LDP – Part 7 (CR-LDP)
RFC 5036: LDP Specification RFC 3815: Definitions of Managed Objects for the MPLS,LDP RFC 3478: Graceful Restart Mechanism for Label Distribution Protocol RFC 5443: LDP IGP Synchronization RFC 7307: LDP Extensions for Multi-Topology RFC 7361: LDP Extensions for Optimized MAC Address Withdrawal in a H-VPLS RFC 3212: Constraint-Based LSP Setup using LDP RFC 3213: Applicability Statement for CR-LDP RFC 3214: LSP Modification Using CR-LDP
…YOU CAN REACH ALL THE “MPLS” ARTICLES AND CONFIGURATIONS BELOW…
MPLS Basics
What is MPLS?
Enabling MPLS on Cisco Router
MPLS Label Distribution Protocol, LDP
MPLS Label Distribution Protocol, LDP – Part 1
MPLS Label Distribution Protocol, LDP – Part 2
MPLS Label Distribution Protocol, LDP – Part 3 (Configuration on ALU)
MPLS Label Distribution Protocol, LDP – Part 4 (ECMP)
MPLS Label Distribution Protocol, LDP – Part 5 (Export and Import Policy, Prefix Aggregation)
MPLS Label Distribution Protocol, LDP – Part 6 (T-LDP)
MPLS Label Distribution Protocol, LDP – Part 7 (CR-LDP)
MPLS, RSVP-TE
MPLS, RSVP-TE – Part 1
MPLS, RSVP-TE – Part 2(Alcatel-Lucent Configuration)
MPLS Protection And Restoration
MPLS Protection and Restoration – Part 1
MPLS Protection and Restoration – Part 2 (End-to-End Protection, Secondary Paths)
MPLS Protection and Restoration – Part 3 (Path Diversity in Secondary Paths)
MPLS Protection and Restoration – Part 4 (Local Protection, Fast Reroute)
MPLS Protection and Restoration – Part 5 (Fast Reroute Protection Types)
MPLS Protection and Restoration – Part 6 (RSVP Objects Used for MPLS Fast Reroute)
MPLS Protection and Restoration – Part 7 (Verification Commands on Alcatel-Lucent Routers)
MPLS Protection and Restoration – Part 8 (Actions After the Failure)
MPLS Protection and Restoration – Part 9 (Convergence Factors)
MPLS Protection and Restoration – Part 10 (Juniper Configuration Samples)
MPLS Protection and Restoration – Part 11 (Juniper Configuration Samples)
MPLS Protection and Restoration – Part 12 (Juniper Configuration Samples)
MPLS Protection and Restoration – Part 13 (Juniper Configuration Samples)
Related posts:
Network Ports
MPLS Protection and Restoration – Part 4 (Local Protection, Fast Reroute)
MPLS Protection and Restoration – Part 5 (Fast Reroute Protection Types)
MPLS Protection and Restoration – Part 6 (RSVP Objects Used for MPLS Fast Reroute)
MPLS Protection and Restoration – Part 13 (Juniper Configuration Samples)
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