L1VPN Extended Overlay Model draft-fedyk-ccamp-l1vpn-extnd-overlay-00 Don Dieter Lieven IETF 84 – CCAMP WG

Agenda Extended L1VPN overlay network model Dual homing LSP latency constraints Next steps

Introduction L1VPN Extended Model This I-D is based on: – RFC4847: Framework and Requirements for Layer 1 Virtual Private Networks – draft-belotti-app-statement-l1vpn-em-00: Applicability Statement for Layer 1 Virtual Private Network (L1VPN) Enhanced Mode Focusing upon the overlay extension service model  UNI Extensions are including additional constraints: – Diversity for dual homed CEs – Minimal/Upper bound of the end-to-end latency (provider network)

L1VPN Overlay Network Model UNI between CEs and PEs - signaling only, no routing protocol CE view: cloud + reachability information (other L1VPN CEs) Provider network provides services on demand Meshed provider network accommodating multiple L1VPNs Meshed Provider Network UNI PE 1 CE 1 UNI PE 2 CE 2 PP PP UNI PE 3 CE 3 PE 4 UNI PE 5 CE 4 PE 6

Dual-homing Problem Statement PE 1 PPPE PE 2 PPPE CE LSP 1 LSP 2 Problem Statement: ensure that LSP1 and LSP2 are mutually disjoint

Option 1: Exchange of SRLG List PE 1 PPPE PE 2 PPPE CE LSP 1 LSP 2 SRLG_IDs(LSP 1 ) SRLG_IDs(LSP 2 ) Exchange of SRLG ID list for disjoint LSPs via source CE node

Option 2: Exchange of Path Affinity Set PE 1 PPPE PE 2 PPPE CE LSP 1 LSP 2 PAS(LSP 1 ) Exchange of PAS + LSP ID via source CE node Dissemination of (PAS, LSP ID, SRLG IDs) among PEs for each L1VPN

Signaling LSP Latency Constraints Latency requirements for the UNI: – Support of LSP requests with minimal latency – Support of LSP requests with max. acceptable latency (upper bound) Related to the following CCAMP I-D: draft-ali-ccamp-te-metric-recording-02.txt UNI signaling extensions still to be defined

Next Steps Solicit feedback/comments from the group Refinement of dual-homing solution including more detailed signaling extensions Elaboration of latency chapter including required signaling extensions

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