1. IPv6 for ISP Industry Sify Technologies Ltd Somasundaram Padmanabhan Network Engineering somasundaram.padmanabhan@sifycorp.com IPv6 Awareness Workshop May 2011

2. Sify - Who are we ? Profile vs. Topic One of India’s largest private IP/MPLS Service Providers  MPLS enabled IP Service Provider – 935 nodes => 400+ IP/MPLS POPs  Most services operational on fixed wireless broadband access => many links [management, services are all on IP]  Enterprise Business Services – DIA, MPLS VPNs => many many customer links - IP again  Consumer broadband service – IP based ETtH, WBB Access – IP again  Other consumer services – Organized chain of cybercafés => many PCs within Cybercafés – IP again

3. IP is our DNA Sify - Who are we ? Profile vs. Topic

4. IP address Depletion ? What is the impact One of the India’s largest private IP/MPLS Service Providers  MPLS enabled IP Service Provider – 935 nodes => 400+ IP/MPLS POPs  Most services operational on fixed wireless broadband access => many links [management, services are all on IP]  Enterprise Business Services – DIA, MPLS VPNs, DCN services => many many customer links - IP again  Consumer broadband service – IP based ETtH, WBB Access – IP again  Other consumer services – Organized chain of cybercafés => many PCs within Cybercafés – IP again How do we grow the network if there are no IPv4 addresses ? How do we spread fixed wireless access reach ? Every BSTN [full-load] requires – 240 addresses – Mgmt/WAN ONLY How do we add more business customer and more services ? How do we add more consumers and manage higher concurrency ? Growing umber of IP end-points within a home – More IPs !!! How do we add more services within the e-ports and also add more e-ports ?

5. IPv6 in Sify Other business Drivers  Business Drivers – As we see it  With the hosted and collocated contents - IPv6 Network access support at the Data Center.  Customers demanding IPv6 transport solutions.  Gaining the technical competitiveness with advanced services on IPv6.  Strategies in preparing new services, with competitive advantage.  Enterprise Customer perspective.  With need for keeping up with the technology advancements and being futuristic.  Rolling out peer-to-peer applications mandating routable IP address space for every end-point.

6. IPv6 deployments in Sify Sify is the pioneer in testing and deployment of IPv6 technologies and its associated services in India.  Sify has a dual-stack (IPv4 & IPv6) compliant edge with an MPLS enabled NGN core supporting transport of IPv6 packets alongside IPv4.  With the dual-stack edge, Sify can offer IPv6 VPN & Internet transit services to its enterprise customers.  All the four Internet Data Centers are IPv6 enabled and supports IPv6-aware services.  Sify has deployed http://sify.com as the first dual-stack commercial content portal in India.http://sify.com

7. Sify is the only SP member in the project 6Choice, a India – Europe cooperation for promoting IPv6 adoption. Sify is funded for developing case-studies based on its experiments to promote IPv6 migration in the Industry. Some of the projects include,  Enabling dual-stack for consumer access network environment.  Helps consumers with IPv6 compliant desktops to connect to IPv6 public Internet.  Also helps in building networked home solutions with the huge number of IPv6 address space.  IPv6 transport support for data center networks.  Supports customers hosting IPv6 enabled contents in our Datacenters. IPv6 deployments in Sify

8. Sify ’ s IPv4 address space Sify Supernet Number of IP'sYear of assignment 202.177.144.0/202^124096 Over a decade 202.177.160.0/192^138192 210.18.0.0/172^1532768 210.210.0.0/172^1532768 210.214.0.0/162^1665536 124.30.0.0/162^1665536 119.226.0.0/152^17131072 221.134.0.0/152^17131072 202.144.0.0/172^1532768 118.94.0.0/152^17131072 124.7.0.0/162^1665536 700416 Sify-IPv4IPv4-overall% of share 70041642949672960.016307831 0.7 Million IP Addresses Sify ’ s IPv6 address space Sify Supernet Number of IP'sYear of assignment 2001:E48::/322^967.92282E+28Over 3 years Sify-IPv6IPv6-overall% of share 7.92282E+283.40282E+382.32831E-8 79228 Trillion Trillion IP Addresses 0.016% IPv4 4.2 billion IPv4 Addresses IPv4 0.7 million IPv4 Addresses IPv6 340 Trillion Trillion Trillion IPv6 Addresses IPv6 72998 Trillion Trillion IPv6 Addresses 0.00000002% IP Addresses A Plenty !

9. Integration Strategy The Approach  IPv4 OFF! & IPv6 ON! – Not something to have any day in the foreseeable future.  IPv4 & IPv6 will co-exist for sometime in future.  IPv4 implementations should support its successor IPv6 in all aspects.  Careful planning and education crucial for successful integration and transition.  Start with the dual-stack SP edge to enable IPv6 service offerings.

10. Key factors  Both IPv4 and IPv6 stacks should be enabled.  Applications can use both.  Choice of stack based name lookup and preference. [IE Browser prefers IPv6 stack] Application TCPUDP IPv4IPv6 Data-link (Ethernet) Application [IPv6 Enabled] TCPUDP IPv4IPv6 Data-link (Ethernet) Dual Stack Approach

11. Integration Strategy Some Guidelines Basic steps in integration common for enterprise & SP environments, Addressing scheme for IPv6 Services with IPv6 like Multicast, DNS, QoS etc. Network Security Routing Protocols Network Management and other OAM related aspects. Resources are shared when IPv4 & IPv6 co-exist. Memory and processor requirements - to be evaluated. Look for HW-based forwarding for IPv6 in the near future

12. How to get there… Today’s scenario in SP networks,  Core - It is either Native IPv4 or MPLS with associated services.  Services – MPLS L2/L3 VPNs, QoS... Or L2TPv3, QoS, Multicast…, Datacenter, Consumer services etc. All this to be IPv6 compliant for an ISP to be successful in integration.

13. IPv6 : Migration Adapt, integrate & co-exist Deployment options in SP core  For Native IPv4 environments, Tunnel IPv6 in IPv4 Enabling Dual-stack IPv4-IPv6 Native IPv6 with dedicated network resources  For MPLS environments, IPv6 Provide Edge solutions IPv6 MPLS VPN solutions

14. SP networks IPv6 Internet Access, data centers MPLS Core with dual-stack edge Site-A Enterprise sites with IPv4 & IPv6 applications Enterprise sites with IPv4 & IPv6 applications IPv6 packet transport IPv6 Internet Dual-stack web application servers Dual-stack firewall Dual-stack Routing edge Dual-stack services of http://sify.com  IPv6 MPLS Provider Edge with dual-stack  MPLS P routers IPv4 only; IPv6 unaware  IPv6 Internet access via dual-stack peering

16. Sify routes – Looking glass view

17. Enterprise networks IPv6 VPNs MPLS Core with dual-stack edge Site-B Site-A Enterprise sites with IPv4 & IPv6 applications Enterprise sites with IPv4 & IPv6 applications IPv6 & IPv4 transport VPN  IPv6 MPLS Provider Edge with dual-stack  MPLS P routers IPv4 only; IPv6 unaware  IPv6 VPNs facilitates IPv6 transport between sites

18. IPv6 Migration Using ISATAP IPv4 ISP Network Cybercafe environment Mobile user on IPSec VPN IPv6 Internet L2TP Tunnels IPSec Tunnels ISATAP Tunnels IPSec Tunnel Gateway BRAS ISATAP Gateway  Router as ISATAP gateway connecting users to IPv6 Internet.  Extends IPv6 access through IPsec tunnels of remote access clients.  MS XP/Vista support ISATAP clients

19. Consumer Network IPv6 Internet Access MPLS Core with dual-stack edge IPv4 consumer access network IPv4 Internet IPv6 Internet BRAS ISATAP ISATAP Tunnel IPv4 Internet traffic IPv6 Internet traffic Cybercafe environment  Cyber café environment enabled dual-stack to support access to IPv4 and IPv6 Internet  ISATAP over L2TP helps reach ISATAP gateway for auto-assignment of IPv6 addresses

20. The Future As we see it MPLS Core with dual-stack edge IPv4 consumer access network IPv4 Internet IPv6 Internet BRAS ISATAP ISATAP Tunnel IPv4 Internet traffic IPv6 Internet traffic Cybercafe environment Contents

21. Summary Adapt, Integrate & Co-exist  Adapt IPv6 in your network transport, however small or big it is.  Integrate it with the current network transport solutions with various scenarios and applications.  Make IPv6 co-exist in the current network environment  Half the battle WON.

22. Thank You