A lightning talks presentation at APRICOT 2015.

1. A mechanism for IPv6 migration and IPv4 sunsetting
AutoIP
Shishio Tsuchiya – CSE shtsuchi@cisco.com
Ole Trøan – Tech Lead
Steve Simlo – Product Manager

2. 2© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
• A mechanism for IPv6 migration and IPv4 sunsetting
• Dynamically Create Overlay Tunnel Topology
• Use Native IGP to discovery tunnel end point
What is AutoIP?

3. 3© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
IPv6 Network Transition – AutoIP Phases
When AutoIP will be needed
IPv4 Access
Network
IPv4 Core
Edge Network
IPv4 only
IPv6 Access
Network
IPv6 Core
Edge Network
IPv6-Only
Dual Stack
Core
+
Access
Edge Network
Dual Stack
PE
CE
Edge
Network
v4
over
v6
Dual Stack Core
4over6
AutoIP Phase
CE
Dual Stack Core
v6
over
v4
Edge Network
AutoIP Phase
6over4
CE
IPv6 Transition Technology
6 over 4
IPv4 Sunset Technology
4 over 6
IPv4 IPv6

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• Current most of enterprise network status
• What is problem to deploy IPv6
-Hardware not support IPv6 - Software not support IPv6
-Lack of IPv6 feature - Lack of resource to deploy new protocol(IPv6) and new routing
protocol(ex.OSPFv3)
IPv4 only
IPv4 Access
Network
IPv4 Core
Edge Network
IPv4 only
OSPFv2 OSPFv2 OSPFv2 OSPFv2

5. 5© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
• IPv4/IPv6 enabled on dual Stack capable node/network
• Enabled AutoIP, then it makes IPv6 over IPv4 tunnel automatically
• Can use different routing protocol in each of address families. ex. EIGRP using in IPv4
but would like to use OSPFv3 in IPv6.
AutoIP Phase IPv6 over IPv4
Dual Stack Core
v6
over
v4
Edge Network
AutoIP Phase
6over4
CE
OSPFv2
AutoIP
OSPFv2
OSPFv2
AutoIP
OSPFv2
OSPFv3 OSPFv3 OSPFv3
IPv6 unaware
IPv6 over IPv4

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• IPv6 enable on all of node/network
• The Problem is …have to manage multiple routing protocols
IPv4/IPv6 Dual Stack
OSPFv3
Dual Stack
Core
+
Access
Edge Network
Dual Stack
CE
OSPFv2 OSPFv2 OSPFv2 OSPFv2
OSPFv3 OSPFv3 OSPFv3

7. 7© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
• AutoIP enable for IPv6 terminal undeveloped site or IPv4 necessary site
• Established IPv4 over IPv6 tunnel automatically
• routing metric for tunnel would be -1 than actual routing metric. so traffic does not
transit at this point.
AutoIP Phase IPv4 Sunset IPv4 over IPv6
Edge
Network
v4
over
v6
Dual Stack Core
4over6
AutoIP Phase
CE
OSPFv3
OSPFv2 OSPFv2 OSPFv2 OSPFv2
OSPFv3
AutoIP
OSPFv3
OSPFv3
AutoIP
IPv4 over IPv6

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• IPv4 routing protocol disabled on intermediate node
• OSPFv2 only running over overlay topology
AutoIP Phase IPv4 Sunset IPv4 over IPv6
OSPFv3
OSPFv2 OSPFv2
OSPFv3
AutoIP
OSPFv3
OSPFv3
AutoIP
IPv4 over IPv6
Edge
Network
v4
over
v6
Dual Stack Core
4over6
AutoIP Phase
CE

9. 9© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
• Disable IPv4 on all of network when deployed all of IPv6 enable
terminal
IPv6 only network
IPv6 Access
Network
IPv6 Core
Edge Network
IPv6-Only
PE
OSPFv3OSPFv3 OSPFv3 OSPFv3
Final

10. 10© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
AutoIP setup sequence
End Point Discovery
distribute node information in
network by extension IGP
OSPFv2 Router Information
(RI) Opaque LSA
OSPFv3 Router Information
(RI) Opaque LSA(RFC4970)
EIGRP:Community TLV
Overlay
Topology
Calculation
uses shortest tunnel
（not full mesh ）
Tunnel Setup
Stateless: GRE/IPinIP
Signaled: IKE/L2TP
I can talk
GRE
I can talk
GRE
R1
Shortest
Path via
R1
Shortest
Path via
R1 R1
R1

11. 11© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
• AutoIP is standard based technology set
Routing Information LSA(RFC4970)
Tunnel Attribute(RFC5512/RFC5566)
Tunnel Setup(GRE/IPinIP/L2TP/IPSec)
• Cisco already provide running code as EFT(Early Field Trial)
http://6lab.cisco.com/autoip/
Support EIGRP for IPv4/IPv6 and OSPFv2/OSPFv3
GRE tunnel type support
use tunnel template for tunnel create
Running Code

12. 12© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
EFT implementation for OSPFv3
interface
Virtual-Template1
type
tunnel
ip
unnumbered
Loopback0
ipv6
enable
tunnel
source
Loopback0
tunnel
mode
gre
ipv6
!
autoip
ospfv3
1
area
0
ipv6
template
Virtual-Template1
!
JP2#show
ospfv3
database
autoip
OSPFv3
1
address-family
ipv6
(router-id
192.168.255.2)
AutoIP
(Type-13)
Link
States
(Area
0)
LS
age:
87
Link
State
ID:
0
(Interface
ID)
Advertising
Router:
192.168.255.1
LS
Seq
Number:
80000036
Checksum:
0x73CA
Length:
40
IPV6
Destination
to
this
node:
FD89:250E:192:168:FFFF::1
--snip--

13. 13© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
EFT implementation for OSPFv3 cont’d
JP2#show
ip
ospf
neighbor
Neighbor
ID
Pri
State
Dead
Time
Address
Interface
192.168.255.1
0
FULL/
-
00:00:32
192.168.255.1
Virtual-Access1
JP2#show
ip
route
ospf
-snip-
O
E2
10.10.10.0/30
[110/1]
via
192.168.255.1,
00:15:01,
Virtual-Access1
O
E2
10.10.10.4/30
[110/1]
via
192.168.255.1,
00:15:01,
Virtual-Access1
-snip-
O
192.168.255.1
[110/3]
via
192.168.255.1,
00:15:01,
Virtual-Access1
O
192.168.255.3
[110/5]
via
192.168.255.1,
00:13:48,
Virtual-Access1
O
192.168.255.4
[110/4]
via
192.168.255.1,
00:15:01,
Virtual-Access1
-snip-

14. 14© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Public
• AutoIP is a mechanism for IPv6 migration and IPv4
sunsetting
• AutoIP is standard based technology
• Running code exists.
• If interested in, let us know and try EFTJ
Summary