The question „will IPv6 ever by widely deployed?“ is no longer open. The answer is a clear „yes“. 2 • Google, Facebook are accessible using IPv6 • Free.fr has 500„000 IPv6-enabled customers (which makes it the largest IPv6 ISP in the world) • Most major Telcos have stated that they are now starting to deploy real IPv6 services. Most will do so in 2011/2012 • And yes, IPv4 addresses will become scarce real soon… But that‟s another story…
The driver for IPv6 is the lack of IPv4 addresses. But IPv6 does not solve the IPv4 address shortage problem 3 • IPv6 is not compatible to IPv4. So IPv4 must continue to be operated • IPv4 addresses can be saved by using them more efficiently, or by deploying NAT inside the carrier„s network (NAT44, CGN). Drives complexity and costs short term fix. • IPv6 is not the short term solution. But in the long run it„s the only way to continue the Internet as we know it today. Medium term strategy: IPv4 address depletion IPv6 migration Action plan: Short term fix: End-to-end NAT44 deployment IPv6 deployment • IPv6 does not replace IPv4, it„s added in parallel to it „Dual Stack“
Our IPv6 policy: We enable our customers to access the IPv6 Internet, and we offer our services to the IPv6 Internet 4 • External communication (aka Internet) will need IPv6 first. Gartner recommends that enterprises establish an IPv6 Internet presence in the 2012 to 2015 time frame. • Internal networks and services can remain IPv4 on the longer term • Swisscom is currently analyzing all its services, to identify the steps required for introducing IPv6, and is working out a detailed roll-out plan – Entire IT tool chain: order entry, service fulfillment and assurance, billing – Network elements (routers, firewalls, load-balancers…) and platforms – Regulatory aspects, such as lawful intercept – Security, both from Swisscom‟s and our customer‟s point of view – Product integration (part of the standard offering or option, …) – Customer experience – Impact on operations, training of staff • About to launch IPv6 for residential wireline Internet access:
So, what are we doing right now? IPv6 @ Swisscom 5 • IP-plus backbone is fully dual-stack, IP-plus business Internet access is available with native IPv6. • IPv6 in our mobile network. Works in the lab, are now expanding from there into the IT systems (RADIUS, User Databases (HLR), Mobile Proxy, Billing, etc.) and into the radio access network. – The few handsets that support IPv6 cannot operate Dual Stack. IPv6 only is not interesting for most people – LTE Rel. 8 / 3G Rel. 9 defines a Dual Stack PDP context. – Newest chipsets support PDPv4v6, so the handset situation will improve. • More labs for broadband access and datacenter environments. Gives those engineers and sysadmins something to learn from! • We‟ll launch IPv6 for residential Internet access this year
What is required for an IPv6 Internet Access Service? Complex infrastructure is barrier to cost-efficient IPv6 deployment. Legacy infrastructure cannot be upgraded easily. 6 End-to-end overview of Swisscom‘s Internet Access Service network IT Systems: DHCP, RADIUS, wholesale LDAP retail ADSL ATM BRAS MPLS VPN IT Systems: Various user/serviceL2 platform, L2 platform, PPP Route databasesIPv6 not IPv6 not IPoE Reflector: IPv4/IPv6required required IPoEoA Required Required IPv6 IPv6 dual stack features features available LNS VDSL native Ethernet available (6VPE) MPLS VPN MPLS VPNNo IPv6support in L2 platform, 3P-PEused mode IPv6 not required, but SSGof operation scalability issues 6VPE ready FTTH Ethernet over MPLS P Routers: BNG IPv6 not required IPoE ISGL2 platform,IPv6 notrequired L2 platform, IPv6 not required Access Core ISP connectivity ISP core Internet peeringAccess Aggregation Edge
Using 6RD, IPv6 Internet access is an incremental upgrade. Production-quality IPv6 Internet access at a fraction of the costs 7 IT Systems: • No complex upgrade of infrastructure, wholesale DHCP, RADIUS, retail LDAP ADSL leverage IPv4 network to provide ATM IPv6 access. Simply... BRAS MPLS VPN 6RD Border IT Systems: Various – Add IPv6 and 6RD support to Relay user/serviceL2 platform, customer modems L2 platform, PPP Route Lausanne databasesIPv6 not IPv6 not IPoE Reflector:required – Add 6RD Border Relays to dual-stack required IPoEoA Required IPv4/IPv6 Required IPv6 IPv6 dual stack portion of network features features LNS available VDSL native Ethernet available 6RD CE (6VPE) router native IPv6 IPv4 access IPv6 MPLS VPN home network Internet MPLS VPNNo IPv6 networksupport in L2 platform, 3P-PEused mode IPv6 not required, but SSGof operation scalability issues 6VPE ready Home network (dual stack) Swisscom P Routers: FTTH Ethernet over MPLS Internet BNG IPv6 not Access Service required network (IPv4 only) IPoE 6RD Border ISGL2 platform, Relay ZürichIPv6 notrequired L2 platform, IPv6 not required AccessInternetISP connectivity stack) core Core peering (dual ISP Internet peeringAccess Aggregation Edge
6RD is a Stateless Tunnel Technology, Embedding the CE‟s IPv4 Address into the IPv6 Prefix. IPv6 Rapid Deployment on IPv4 Infrastructures (RFC 5969) 8Networktopology IPv4 native IPv6 native IPv6 network network network 6RD CE router 6RD Border Relay send to preconfigured BR address send to embedded CE addressIPv6 addressformat for 6RD IPv6 prefix is calculated from the IPv4 address 2A02:1200 188.8.131.52 Subnet ID Interface ID 0 28 60 64 6RD prefix subscriber subnetting up to 32 bits of subscriber’s IPv4 addressIPv4 header &encapsulatedIPv6 packet IPv4 Header IPv6 Header(downstream) IPv4 dest 184.108.40.206 copy IPv6 Payload
6RD Border Relay Implementation Details 9 • Cisco ASR1002-ESP10 scales up to 10 Gb/s per box (tested) • Using anycast IPv4 address, geographically distributed scale by adding more boxes • Topology: “Router on a stick“ No danger of black hole routing, as IPv4 and IPv6 interface status is inherently coupled.Router on a stick Separate IPv4 6RD Border Relay and IPv6 interface 6RD Border Relay IPv4 + IPv6 OSPFv2 OSPFv3 OSPFv2 OSPFv3 IPv4 IPv6 IPv4 Link failure Link failure IPv6 propagated not noticed in Dual stack core IPv4 IGP (or router on both IGPs vice versa)
6RD CPE Routers Implementation Details 10 • Vendors: Motorola, ADB Broadband (formerly Pirelli Broadband) • 6RD parameters configured using TR-069 – Swisscom 6RD prefix and length (2a02:1200::/28) – IPv4 bits suffix length (all 32 bits) – 6rd Border Relay anycast IPv4 address – Swisscom DNS servers – IPv6 flag (enable/disable) • IPv6 must be enabled by customer on “customer centre” website (no other changes to IT/OSS tools) • Third-party modems (AVM Fritz Box and others) work, but need manual configuration
Implementation details IT aspects 11IT Systems • Display IPv6 check box on “customer centre” website if router supports IPv6, store IPv6 status in customer database • Display IPv6 status to customer support, enable them to change status • Implement new TR069 parameters for 6RD • No other changes! No address management, no provisioning, etc!DNS • Separate DNS (Google white-listed) that can stop handing out AAAA records if problems with IPv6 should occur • 6rd.swisscom.com
First deployment experiences: expect to find problems with turning on IPv6 12 • 2011 – the year of the MTU? Make sure Path MTU Discovery works! – 7600 with 6748 LAN card and IOS 12.2(22)SXF10: sets IPv6 MTU to 1486 Bytes (no matter what is configured) – Motorola CPE (Beta version) does not do PTMUD at all… – ASR-1k: ICMP Packet Too Big messages use final destination‟s address as source address (not local address) • 7600 with 12.2(33)SRE3: Buffer leak when IPv6 is enabled. Requires periodic reboot of the box.
Project IPv6 6rd: Phased introduction of IPv6 13 • Phase 0, ongoing: Internal testing and internal pilot with very friendly customers • Phase 1, July – September: Pilot with ~1000 customers (internal and external) – Dedicated team of customer support agents, trained for IPv6 • Phase 2, September – ?: Rollout of the IPv6-capable router firmware, with IPv6 deactivated – Customer has to active IPv6 himself on his customer portal – Expecting slow takeup, giving us time to fix bugs and ramp up IPv6 knowledge of support personnel • Phase 3: When we have gained enough confidence in our IPv6 capabilities: Activate IPv6 by default, by enabling it with our home device management system.
Swisscom will launch IPv6 for residential customers in 2011, using 6rd technology. 14 • 6RD changes the IPv6 “business case” from complex & expensive to simple & cheap. There‟s no excuse for not deploying IPv6 now! • 6RD is simple, reliable, scalable technology – Fast prototyping thanks to Linux implementation – Vendors engineering/beta implementations quickly available, yet (inter-) worked flawlessly – Tested and proven scalability • Large-scale pilot to be started in July 2011. – If you are a Swisscom customer and – have a “Centro” series router, then apply! – (Link to be published) – Check out the “sneak preview” at http://labs.swisscom.com