IPv6 for ISP Industry Sify Technologies Ltd

Somasundaram PadmanabhanNetwork Engineering

somasundaram.padmanabhan@sifycorp.com

IPv6 Awareness WorkshopMay 2011

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

IP is our DNA

Sify - Who are we ?Profile vs. Topic

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 ?

IPv6 in SifyOther 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.

IPv6 deployments in SifySify 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.

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

Sify’s IPv4 address spaceSify Supernet Number of IP's Year of assignment

202.177.144.0/20 2^12 4096

Over a decade

202.177.160.0/19 2^13 8192

210.18.0.0/17 2^15 32768

210.210.0.0/17 2^15 32768

210.214.0.0/16 2^16 65536

124.30.0.0/16 2^16 65536

119.226.0.0/15 2^17 131072

221.134.0.0/15 2^17 131072

202.144.0.0/17 2^15 32768

118.94.0.0/15 2^17 131072

124.7.0.0/16 2^16 65536

700416

Sify-IPv4 IPv4-overall % of share

700416 4294967296 0.016307831

0.7 Million IP Addresses

Sify’s IPv6 address spaceSify Supernet Number of IP's Year of assignment

2001:E48::/32 2^96 7.92282E+28 Over 3 years

Sify-IPv6 IPv6-overall % of share

7.92282E+28 3.40282E+38 2.32831E-8

79228 Trillion Trillion IP Addresses

0.016%

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IP Addresses A Plenty !

Integration StrategyThe 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.

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

TCP UDP

IPv4 IPv6

Data-link (Ethernet)

Application[IPv6 Enabled]

TCP UDP

IPv4 IPv6

Data-link (Ethernet)

Dual Stack Approach

Integration StrategySome 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

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.

IPv6 : MigrationAdapt, 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

SP networksIPv6 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-stackMPLS P routers IPv4 only; IPv6 unawareIPv6 Internet access via dual-stack peering

Sify routes – Looking glass view

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-stackMPLS P routers IPv4 only; IPv6 unawareIPv6 VPNs facilitates IPv6 transport between sites

IPv6 MigrationUsing ISATAP

IPv4 ISP Network

Cybercafe

environment

Mobile user on IPSec VPN

IPv6 Internet

L2TP Tunnels

IPSec Tunnels

ISATAP Tunnels

IPSec Tunnel

Gateway

BRASISATAP

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

Consumer NetworkIPv6 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 InternetISATAP over L2TP helps reach ISATAP gateway for auto-assignment of IPv6 addresses

The FutureAs 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 Contents

Contents

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.

Thank You