1. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 1
Seamless MPLS for Mobile Backhaul
draft-li-mpls-mbb-seamless-mpls-00
Zhenbin Li, Lei Li (Huawei)
Manuel Julián López Morillo (Vodafone)
Tianle Yang (China Mobile)
IETF 87, Berlin, Germany
2. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 2
Seamless MPLS Network Architecture
The key concepts for Seamless MPLS: Decoupling the transport layer and service layer.
The network will be divided into multiple IGP areas for access, aggregation and core
network
IBGP run among the Area Boarder Routers (ABRs) to advertise labeled route.
LDP DoD is introduced to set up LSP on demand between AN and AGN.
Access Aggregation Access
Aggregation
Core
AGN LSR ABR LSR ABR LSR AGN
RR IS-IS L1
LDP
IS-IS L2
LDP
IS-IS L1
LDP
AN
AN
AGN LSr ABR LSR ABR LSR AGN
ISIS
ABR Loop-Back
ISIS
ABR Loop-Back
IBGP IBGP IBGP IBGP
Static Route
LDP DoD
Static Route
LDP DoD
3. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 3
Seamless MPLS for Mobile Backhaul Networks
Ring topology is adopted in mobile backhaul networks.
Variable devices with variable capability are deployed in the access
ring and aggregation ring.
Transport
Layer
LDP/TE LSP
BGP LSP
Hierarchical BGP LSP
Service
Layer
L2/L3
Services
Next-Hop self Next-Hop self
Last Mile Access Aggregation Core
RSG
RSG
CSG
BTS
eNB
NodeB
BSC
ASG
ASG
RNC
S-GW/MME
CSG
CSG
CSG
CSG
4. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 4
Scenarios for Network Architecture
Network Architecture 1: Network separated by Ases
Scenario 1: ASes connected by different ASBRs
Scenario 2: ASes connected by integrated ASBRs
Different network integrated in one AS but separated by
different IGP areas
5. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 5
Scenarios for Different Edge of Labeled BGP
Scenario 1: Cell Site/User PE devices as the edge
Scenario 2: ASG nodes as the edge
Scenario 3: RSG(ASBR) devices as the edge
6. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 6
Overall New Requirements of Seamless MPLS for MBB
Requirements on MPLS TE
Proxy Egress LSP and BGP LSP Stitching
Unified OAM: end-to-end OAM for mobile service
Protection: end-to-end convergence in 50 ms
Scalability: improve scalability of MPLS TE
Requirements on Ring Network
LDP DoD: Multiple hops for provision of LDP DoD
LDP FRR: 100% network coverage
Requirements on L3VPN
Policy control: Reduce complexity on control route distribution
L3VPN OAM: SDH-like OAM requirement for mobile service
7. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 7
Requirements and Solutions of Seamless MPLS for MBB(1)
Scalability
Auto Mesh and Enhancement:
―Auto Mesh: [RFC4972]
―Role-based Auto Mesh: [I-D.li-ccamp-role-based-automesh]
Service-Driven Tunnel:
―[I-D.li-mpls-serv-driven-co-lsp-fmwk]
Auto Path Computation
―[I-D.li-ospf-auto-mbb-te-path]
8. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 8
Requirements and Solutions of Seamless MPLS for MBB(2)
Access Stitching
Transport Layer Stitching
―Proxy TE: [I-D.li-mpls-proxy-te-lsp]
―Proxy LDP DoD: proposed later
Service Layer Stitching
―L3 Service Stitching: Hierarchy of VPN (HoVPN)
―L2VPN Service stitching: Multi-Segment PW
9. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 9
Requirements and Solutions of Seamless MPLS for MBB(3)
Reliability
MPLS TE
MPLS LDP
―MRT FRR based on LDP MT: [I-D.li-rtgwg-ldp-mt-mrt-frr]
Policy Control: Improve Intelligence of IBGP
AIGP
―[I-D.ietf-idr-aigp]
NEXTHOP_PATH ATTIBUTE
―[I-D.zhang-idr-nexthop-path-attr-00]
10. draft-li-mpls-seamless-mpls-mbb-00
IETF 87 MPLS 10
Requirements and Solutions of Seamless MPLS for MBB(4)
OAM
L2VPN
―VPN Layer: MPLS TP for PW
―Service Layer: Y.1731 for MAC
L3VPN
―VPN Layer - L3VPN PM: [I-D.zheng-l3vpn-pm-analysis]/ [I-D.dong-
l3vpn-pm-framework]
―VPN Layer - IPFPM: [I-D.chen-coloring-based-ipfpm-framework]
Service Path Visualization
―Trace the whole path in one operation
