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IPv6 Deployment in Enterprise Networks
Ivan Pepelnjak
Chief Technology Advisor, NIL Data Communications
©2009 NIL 2
Scenario
• Do I care about IPv6?
• Where shall I focus my efforts?
Private network
using RFC 1918 IPv4
DMZ using
public IPv4
Public Internet
©2009 NIL 3
Facts of Life
• IPv6 is here, get used to it.
• You’ll get stuck on migration details.
• Start small, but start now.
©2009 NIL 4
Facts of Life (NAT)
• Everyone uses 4-to-4 NAT. It’s bad.
• Slow migration to IPv6 requires more NAT.
• 6-to-4 NAT stinks.
• 4-to-6 NAT is horrendous.
©2009 NIL 5
Deployment Phase 1: Dual-stack
• Some public servers are reachable over IPv6
Private network
using RFC 1918 IPv4
DMZ using
public IPv4
Public Internet
©2009 NIL 6
Deployment Phase 2: IPv6 Clients
• Some clients are using only IPv6: 6-to-4 NAT
Private network
using RFC 1918 IPv4
DMZ using
public IPv4
Public Internet
©2009 NIL 7
Deployment Phase 3: IPv6 Servers
• Some servers are reachable only over IPv6:
4-to-6 NAT
Private network
using RFC 1918 IPv4
DMZ using
public IPv4
Public Internet
©2009 NIL 8
Timeline Guestimate
Time [years]
IPv6
adoption
[%]
Dual-stack: now IPv6-only clients
2-3 years
IPv6-only servers
10(?) years
Knowledge
opportunity
loss
Business
opportunity
loss Nightmare
©2009 NIL 9
Phase 1 Actions
Ignore IPv6 or …
• Deploy IPv6 in your DMZ infrastructure
• Dual-stack on non-critical servers
Private network
using RFC 1918 IPv4
DMZ using
public IPv4
Public Internet
©2009 NIL 10
Phase 2 Actions
• You are IPv6 ready in your DMZ (are you?)
• Design, test and deploy dual stack in your network
Private network
using RFC 1918 IPv4
DMZ using
public IPv4
Public Internet
©2009 NIL 11
Phase 3 Actions
 Relax and enjoy
 Frantic catch-up efforts
 Suffer the consequences of 4-to-6 NAT
RFC 1918 IPv4
Public IPv6
DMZ using
public IPv4
Public Internet
©2009 NIL 12
Summary
• IPv6 is here
• There’s no rush (yet)
• Use your time wisely

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IPv6 Deployment In Enterprise Networks

  • 1. IPv6 Deployment in Enterprise Networks Ivan Pepelnjak Chief Technology Advisor, NIL Data Communications
  • 2. ©2009 NIL 2 Scenario • Do I care about IPv6? • Where shall I focus my efforts? Private network using RFC 1918 IPv4 DMZ using public IPv4 Public Internet
  • 3. ©2009 NIL 3 Facts of Life • IPv6 is here, get used to it. • You’ll get stuck on migration details. • Start small, but start now.
  • 4. ©2009 NIL 4 Facts of Life (NAT) • Everyone uses 4-to-4 NAT. It’s bad. • Slow migration to IPv6 requires more NAT. • 6-to-4 NAT stinks. • 4-to-6 NAT is horrendous.
  • 5. ©2009 NIL 5 Deployment Phase 1: Dual-stack • Some public servers are reachable over IPv6 Private network using RFC 1918 IPv4 DMZ using public IPv4 Public Internet
  • 6. ©2009 NIL 6 Deployment Phase 2: IPv6 Clients • Some clients are using only IPv6: 6-to-4 NAT Private network using RFC 1918 IPv4 DMZ using public IPv4 Public Internet
  • 7. ©2009 NIL 7 Deployment Phase 3: IPv6 Servers • Some servers are reachable only over IPv6: 4-to-6 NAT Private network using RFC 1918 IPv4 DMZ using public IPv4 Public Internet
  • 8. ©2009 NIL 8 Timeline Guestimate Time [years] IPv6 adoption [%] Dual-stack: now IPv6-only clients 2-3 years IPv6-only servers 10(?) years Knowledge opportunity loss Business opportunity loss Nightmare
  • 9. ©2009 NIL 9 Phase 1 Actions Ignore IPv6 or … • Deploy IPv6 in your DMZ infrastructure • Dual-stack on non-critical servers Private network using RFC 1918 IPv4 DMZ using public IPv4 Public Internet
  • 10. ©2009 NIL 10 Phase 2 Actions • You are IPv6 ready in your DMZ (are you?) • Design, test and deploy dual stack in your network Private network using RFC 1918 IPv4 DMZ using public IPv4 Public Internet
  • 11. ©2009 NIL 11 Phase 3 Actions  Relax and enjoy  Frantic catch-up efforts  Suffer the consequences of 4-to-6 NAT RFC 1918 IPv4 Public IPv6 DMZ using public IPv4 Public Internet
  • 12. ©2009 NIL 12 Summary • IPv6 is here • There’s no rush (yet) • Use your time wisely