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IP/MPLS vs. MPLS-TP: Control Plane

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Download a PDF file: http://www.netmanias.com/en/?m=view&id=oneshot&no=6022 …

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  • 1. June 2013 IP/MPLS World: COMPLEX AND EXPENSIVE MPLS-TP World: SIMPLE AND CHEAP Create Label Forwarding Table entry: Dynamic Routing and Signaling Protocol Create Label Forwarding Table entry: Static Provisioning 1 Protocol MP-iBGP T-LDP RSVP-TE LDP iBGP OSPF IS-IS SPF CSPF MPLS-TE S/W upgrade Soft-State Protocol Processing/Route Calculation 1 Setup a Router Setup a Router Distributed Control Plane (CPU) 2 Setup a Router Distributed Control Plane (CPU) Protocol interworking MP-iBGP/T-LDP RSVP IGP route selection (SPF) LSDB Dynamic Routing and Signaling Protocol TEDB IGP Centralized Control Plane (NMS Server) Network Topology Map Route Calculation, Static Label Provisioning Distributed Control Plane (CPU) Protocol interworking 3. MB-iBGP/T-LDP 2. RSVP RSVP LSP route selection (CSPF) Centralized Control Plane IGP route selection (SPF) LSP route selection (CSPF) LSDB TEDB 1. IGP IGP Label info.(LSP, PW) MP-iBGP/T-LDP RSVP RSVP Dynamic Routing and Signaling Protocol IGP route selection (SPF) LSP route selection (CSPF) LSDB TEDB IGP IGP Label info.(LSP) Label info.(LSP, PW) Label info.(LSP, PW) Data Plane(H/W) Label FIB Data Plane (H/W) Label FIB IP/MPLS Router IP/MPLS Router IP 4 Label Push o o o o o o o Label info.(LSP) Label info.(LSP, PW) Data Plane (H/W) Label FIB Data Plane (H/W) Label FIB 2 3 IP 7 10 Data Plane (H/W) Label FIB IP/MPLS Router IP 7 20 Label swap Data Plane (H/W) Label FIB MPLS-TP equip. IP Label pop Control Plane (IP Routing, RSVP Signaling, SPF, CSPF) inside Routers All of routers maintain and manage a network topology through the routing protocols Setup a path through RSVP signaling. Set MPLS-TE for path link and node protection Configure L3 (vs-lsp)/L2 VPN (pw) using MP-iBGP or T-LDP Data plane packet forwarding method: label pop/swap/push Potential instability due to the dynamic factors inside routers. High CPU load Cost increases in installation (price of system) and operation (labor, training, maintenance, S/W upgrade, power, rate of fault occurrence, etc.) 3 IP MPLS-TP equip. IP 7 10 Label Push MPLS-TP equip. IP 7 20 Label swap IP Label pop o Removed Control Plane (no IP routing, no RSVP signaling, no protocol processing) o No control messages between MPLS-TP equipments(centralized NMS used for managing a network topology information) o NMS pre-provisions the primary and secondary path at all the MPLS-TP equipments statically o Data plane packet forwarding method: label pop/swap/push o Provide carrier class-network stability by eliminating dynamic factors inside both network and equipments o Cost saving in installation and operation by removing control plane inside equipment MPLS-TP provides a Carrier-Class network stability by eliminating dynamic network factors inside the network. Possible to manage easily and intuitively www.netmanias.com Netmanias ONE-SHOT

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