IPv6 Migration Challenges for Large Service Providers

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1 IPv6 Migration Challenges for Large Service Providers Aruna P General manager Network Operation

2 Agenda Airtel Overview Drivers of IPV6 Migration challenges Design Considerations Deployment plan

3 Airtel Overview India s largest Integrated and the first private telecom service provider with foot print in 23 circles Fixed line services in 94 cities Vsat network National long distance network across country International connectivity through i2i and SE-ME-WE4 Integrated solutions for enterprise customers

4 Infrastructure and services ISP network - POPs across country - Peering with major Tier 1 - National peering with NIXI and local ISPs MPLS - POPs across country - L2 and L3 VPNs - NNI with various carriers - Multicast - QOS

5 Infrastructure & services ATM/FR network Wholesale BW for other carriers VSAT network - Internet services through VSAT - L3 VPNs - MPLS and VSAT are integrated Metro Ethernet in all major metros Wimax in all major cities GPRS EDGE

6 roadband growth Dial PSTN NAS Internet LL DSL Access Ethernet DSLAM Fiber /copper BAS Edge Growth Volume Enterprise Distributed Computing (GRID) Mobile RAN Broadband Edge Video IPv6 Multicast Application

7 Need of more IP s per broadband link Convergence of n IP networks in Multi Play calls for huge scale (nxip) address space. Plug & play home networking Home Phone Computers /64 Home GW Cell Phones Home Entertainment Broadband Network Music

8 In Summary IPv4 address pool exhaustion (Future) Increased Broadband user - (xdsl/metro Ethernet / Wireless / GPRS / Dialup/Vsat ) IPTV Service Class 5 VoIP Other Applications

9 Migration Challenges

10 Network Assessment A key and mandatory step to evaluate the impact of IPv6 integration Split in mainly two phases - Infrastructure networking devices - Hosts, Servers and applications Must be as complete as possible to allow upgrade costs evaluation and planning - Hardware type, memory size, interfaces, CPU load, - Software version, features enabled, license type, - IPv6-capable definition, knowledge of the environment and applications, design goals

11 Core/Access Assessment Environment Scenario Does Network Support? Core Core is IPv6 aware Native IP Dual Stack Core is IPv6 unaware MPLS 6PE/6VPE Does existing HW/SW support PE? Access Few customers, no native IPv6 service from the PoP or Data link is not (yet) native IPv6 capable, Tunnels CEs support? Native IPv4-IPv6 services between aggregation and end-users Dual Stack CE and PE HW/SW support Dedicated circuits IPv4 IPv6 Dual Stack CE and PE HW/SW?

12 ccess network DSL elements Content service provider/asp DNS, Mailing Metro ethernet ISP backbone PEs DSLAM BRAS EDGE router Dial up NAS IS CPEs are IPv6? Edge router, BRAS IPv6? Metro? OSS/BSS

13 IPTV CPE (gateway) +STB Live Broadcast & VoD Asset Distribution Super Head End VoD Servers & Local Feeds Metro Ethernet DSLAM CPE (gateway) CPE (gateway) CPE (gateway) +STB IPV6 readiness for Head end Middleware Metro Ethernet STB OSS & BSS DSLAM DSLAM CPE (gateway) CPE (gateway) +STB

14 VoIP Softswitch PSTN Broadband Network (xdsl/wireless) IPV6 readiness for Softswitch IP Phone /PC Soft phone Session Border Controller Media gateway OSS DHCP, NMS, DNS BSS

15 Network monitoring and mangement Network Management évolution needs to be to done before IPv6 deployment strategy Areas to consider - NMS & Applications for IPv6 - HP OV NNM - Performance monitoring tool - Service desk - Network Protocol (SNMP, TFTP, Syslog, Telnet, SSH, over IPv6 - DNS/DHCP server, Netflow Collector, Ciscoworks -In a dual-stack network, both IPv4 and IPv6 environments must be managed with the best optimization to decrease the cost of operations

16 Network Security Threat protection Does the network Support IPV6 based Standard, reflexive, extended access control list? Secure Connectivity Support IPSEC Protocol Authentication for OSPFv3 IPv6 IPsec Tunnel Router-to-Router IPv4/IPv6 Encryption hardware adapter Mobile IP authentication IPv6 Firewall Are there firewall which support IPV4 and IPV6? Security appliances

17 OSS /BSS Challenges AAA server for dial up and broadband on IPv6 Mediation/ Billing server DNS servers which understand IPV4 A records and IPV6 AAAA records Legal interception Customer portal FCAP

18 Other challenges End customer readiness Investment Operational issues Training

19 Design Considerations

20 The Scope of IPv6 Deployment Server to Client Information Services Multimedia (Video Conf) Peer to Peer (ie: Instant Messenger) Operations and Training Campus Enterprise WAN IPv6 over IPv4 Tunnels (Configured, 6to4, ISATAP, GRE) QoS Mobility Provider Edge Integration & Co-Existence Multicast IPv6 Services Provider Core Native IPv4 & IPv6 Security Instrumentation IPv6 Forwarding & Routing protocols (RIPng, EIGRP, OSPFv3, IS-ISv6, MP-BGP4) Broadband Networks IPv6 over MPLS (AToM, 6PE/6VPE) IPv4-IPv6 Translation P r o v i s i o n i n g & M o n i t o r i n g Frame Relay PPP HDLC POSIP ATM FE GE, 10GE Wireless xdsl Cable, FTTH

21 3 Key phases Providing IPv6 services at access level /Edge - Providing IPv6 at core level with out major upgrade of the core and minimum impact on IPv4 Running IPv6 within core infrastructure Interconnecting with other IPv6 service providers

22 Design Objectives IPv6 services to End Users, End to End IPv6 traffic forwarding as applications are located at the edge. Service wise approach Minimum/no impact on services Minimum Operational issues Low risk deployment Low cost Easy trouble shooting

23 Deployment strategy Deployment method Benefits Limitations IPv6 over IPv4 Tunnels IPv6 over Dedicated Data Links IPv6 over MPLS Backbones IPv6 Using Dual-Stack Backbones Easy to deploy on the existing IPv4 Low cost and low risk End-to-end IPv6 with no impact on the IPv4 traffic Low cost IPv6 over MPLS Backbones IPv6 over MPLS no hardware or software upgrades required to the core Less investment high scalability Easy to implement for small campus networks with a mixture of IPv4 and IPv6 applications. Complex management and diagnostics. Lack of IPv6-specific hardware Support for IPv6 network management for the current deployed hardware no limitations on the our existing network. Readily available Complex dual management of routing protocols. Major upgrade for large networks.

24 Network design Considerations Addressing design Access design POP design Core Design Edge design RR design

25 Access design Termination of access on PE - Leased lines - Dialup - Metro network - Broadband network - Wimax PE s are connected to core Integration with IPV6

26 POP Design Access cloud PE PE MPLS core PIX PIX (P) (P) PIX(S) PIX(S) ISP s IPv6 IX Billing/ OSS DNS Mail

27 ore Design Routing Protocol design Running IS-IS Edge peering use their respective loopback address for V4 and will use the same for V6 New PE will add new entries in the core table MPLS design Run LDP LSPs between loopback addresses 6PE and 6VPEs will share the same LSPs No configuration changes required in MPLS network

28 dge Design Edge design - PEs dual stack - Core facing interfaces no change - Changes only in PEs only - Management configurations for IPv6 - Security configurations for IPv6-6PE(IPV6) PE-PE routing design similar to IPv4 PE PE routing design - 6VPE (IPV6 VPN)PE-PE routing design similar to VPNV4 PE-PE routing design RR design - RR will be used to scale IPv6 and VPNv6 - RR are not part of LSP - Dedicated RR boxes with full redundancy

29 Deployment plan

30 Deployment plan Identify service Mapping respective routers in the network Identify the customer locations Plan for Dual stack routers or separate router for less operational issues Setting up DNS to support existing IPV4 A records and IPV6 AAAA records OSS/BSS IPV6 readiness Interconnect access routers over the IPV4

31 IPv6 over MPLS Infrastructure MPLS in their IPv4 backbone for various services -MPLS/VPN, MPLS/QoS, MPLS/TE Several IPv6 over MPLS scenarios -IPv6 Tunnels configured on CE (no impact on MPLS) -IPv6 over Circuit_over_MPLS (L2 VPN- no impact on IPv6) -IPv6 Provider Edge Router (6PE) over MPLS (no impact on MPLS core) Upgrading software to IPv6 Provider Edge Router (6PE) -Low cost and risk as only the required Edge routers are upgraded or installed

32 IPv6 over MPLS Infrastructure VPN A V4 and v6 VPN MP-iBGP sessions V4 and v6 VPN VPN A VPN B V6 only P P VPN A V4 and v6 VPN P P V6 only VPN B VPN B V6 only MPLS core MPLS core unaware of IPV6 PE to be upgraded to dual stack IPV6 reachability among 6PEs MP-IBGP IPv6 packets transported from 6PE to 6PE No change of other architecture of MPLS core NO icmp support as core does not support IPV6

33 Phase II Enterprise Dual-Stack or Dedicated L2 circuits OSS/BSS DSL,, Cable FTTH Aggregation MPLS IPv6 Broadband Users IPv6 IX Peering IPv6 Transit services IPv6 services to Enterprise customers IPv6 services to Home Users Peering IPv6 IX Hot-Spot ISP s

34 Summary Time to start work on IPV6 deployment Migration Challenges Degree Analysis Investments Planning & Approval Phased Approach for Migration

35 Thank you

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