华为IPv6策略_15 - Cisco - 6PE over MPLS -从IPv4到IPv6的一种最佳途径（英文）

Isco. com a Better Way from IPv4 to IPv6 (6PE)over MPLS Y C. Liu Cisco Systems(china) Networking Technology Co., Ltd CTO ycliu@cisco.com e 2003, Cisco Systems, inc. All rights reserved

genda CIsco. com IPv6 migration approaches enabled b MPLS 6PE approach: IPv6 Provider Edge Router over MPlS/Pv4 ●Conc| usIons Presentation ID e 2003, Cisco Systems, Ino. All rights reserved

arkets wh re MPLS facilitates FY CIsco. com Wireless 2.5G/3G mobile phone pDAs, cars networks Service Providers Mobile ISPs, Greenfield ISPs, Regional ISPs and Carriers, Metro Academic and Research Networks(NRN) Presentation D e 2003, Cisco Systems, Ino, All rights reserved

3GPP/UMTS EXample CIsco. com Alternative Applications Legacy mobile IPv6 Mandated Network Services" SCP Multimedia GPRS -SGW CSCF IP Network A ccess IPs Domain CAP Network HSS) CSCW Gi-+HM MPLS offers TE HMT HBSS/ Gb T-SGw*) SGSN ATM+IP +IPv6 GGSN switching TE HMT H UTRAN t MGW Legacy Extemal MS Circuit Switch CS Domain MSC server MSC server --- T-SGW Access Network Applications Services” HSS RsGw” Signalling Interface tents are duplicated for figure Signalling and Data Transfer Interface only, they belong to the same t in the reference mode IM Domain is now a sub-set of the ps domain Presentation ID e 2003, Cisco Systems, Ino. All rights reserved

IPv6 over MPlS Deployment Scenarios CIsco. com Many ways to deliver IPv6 services to End Users Most important is End to End iPv6 traffic forwarding Many Service Providers have already deployed MPLS in their pya backbone for various reasons MPLS/PN, MPLS/QoS, MPLS/TE, ATM+IP switching MPLS can be used to facilitate IPv6 integration Multiple approaches for iPv6 over MPls IPV6 CE-to-CE IPv6 over IPv4 Tunnels Pv6over“ Circuit over MPls” -NettvePy6-MP-s- IPv6 Provider Edge Router(6PE)over MPLs Presentation D e 2003, Cisco Systems, Ino, All rights reserved

IPv6 Tunnels configured on CE CIsco. com IPv6 over IPv4 Tunnels v6 -5IPv6 …… Dual stack IPv4 菌的 IPy4-Pv6 Dual Stack CE routers Pv4-IPV6 V v6 CE routers oC48192 6 4 (PE) (PE) (v4 Py4 No impact on existing IPv4 or MPLS Core(IPV6 unaware) Only CEs have to be IPv6-aware(Dual stack) Mesh of IPv6 over IPv4 Tunnels ce-to-CE Overhead: IPy4 header mPls header MPLS/PN support lPv4-native and IPv6 tunnels Service Provider can't delegate his lPv6 prefix to the cE routers Presentation ID e 2003, Cisco Systems, Ino. All rights reserved

Pv6over“ Circuit over MPls” CIsco. com Circuit over MPLS (eg ATM VC, FR PVC, Ethernet 6 IPv6 IPv6 IPv6 routers circuit IPv6 v68 v6 IPv6 Pv6 No impact on existing IPv4 or MPLs Core(IPv6 unaware) Edge MPLS Routers need to support "Circuit over_ MPLS ● Mesh of“ Circuit Over MPls”PEto-PE PE routers can also be regular iPv6 routers Pv6 over AtM, IPv6 over FR, IPV6 over Ethernet,. to aggregate Customers IPv6 routers Presentation ID e 2003, Cisco Systems, Ino. All rights reserved

Native MPLS Support of IPv6 CIsco. com MPLS Label Switch Paths for IPv6 IPv6 IPv6 IPv6 v6 IPV6 MPLS PV6→◆ ←IPv6 All routers are Pv6-aware r. Core Infrastructure requires full Control Plane upgrade to IPV6 ·Pv6 Routing in core IPv6 Label distribution protocol in core Dual Control plane management if iPv4 and IPv6 services Presentation D e2003, Cisco Systems, Ino. All rights reserved

Agenda CIsco. com IPv6 migration approaches enabled b MPLS 6PE approach: IPv6 Provider Edge Router over MPLS/IPv4 ●Conc| usIons Presentation ID e 2003, Cisco Systems, Ino. All rights reserved

Pv6 Provider Edge Router(6PE) over MPls CIsco. com MP-iBGP sessions 2001:0620:v6 v62001:0420 145.950.0 v62001:0421: 6PE 6PE Dual Stack IPv4 Py6 routers Dual Stack IPv4-IPv6 routers 2001:0621:(v6 CE 6PE IPv4 19276100v4c MPLS v4〉19225410 CE CE Py4 or mPls core infrastructure is lPy6-unaware PEs are updated to support Dual Stack/6PE IPv6 reachability exchanged among 6PEs via iBGP(MP-iBGP) IPv6 packets transported from 6PE to 6PE inside MPLs Presentation D e 2003, Cisco Systems, Ino, All rights reserved