ACP/WGN/SG1#7 1

Ground/Ground IP Communications:European experience and perspectives

European Organisation for the Safety of Air Navigation

Eivan CerasiDAS/CSM

ACP/WGN/SG1 7th Meeting27 March 2006, Malmo

ACP/WGN/SG1#7 2

PEN ( Pan-European Network) iPAX-TF PEN: planning and implementation

FMTP (Flight Message Transfer Protocol)

Content

ACP/WGN/SG1#7 3

Dependence on X.25International Data

• OLDI over X.25• ASTERIX over X.25• AFTN/CIDIN over X.25• CFMU/CRCO/EAD over

separate IP networks

National Services• Internal IP/X25 applications• X25 Links to SITA/ARINC• Management, etc..

Why we need an IP PEN?

ACP/WGN/SG1#7 4

IPAX Task Force & Trials (2001-2004)

WAN trialials to support R&D activities to plan migration from X.25 to IP: 12 European ANSPs, 22 logical interconnectionsctions various lower media (VPN, Internet, LInternet, LL, ISDN, MW) ISDN, MW) 14 European sites + NASA connectnected via IPv6 via IPv6 Directory services (DNS) IP security (IPsec and firewalls)firewalls) X.25 over TCP/IP OLDI over TCP/IP datadata exchangeexchange ASTERIX over IP dataIP data exchangeexchange AMHS over TCP/IPTCP/IP

ACP/WGN/SG1#7 5

Outcome of iPAX-TF and Recomendations

There are no show-stoppers to use of IP for ATC applications

Porting existing applications to IP may require application adaptations (ex: TCP client/server, TCP byte stream, IP addressing)

All UDP-based systems must be designed to mitigate out of sequence and lost UDP/IP datagram's repetition of identical UDP/IP packet (can happen in failure situation of IP multicast)

Destination UDP or TCP Port Numbering must be standardized AMHS (RFC2126: 102), FMTP (8500), ASTERIX over IP (8600)

There are IPv4 address conflict problems at international level End-systems with international access should be dual-stacked (IPv4/v6) by 2009 (IPv6 is the

standard network protocol to which all applications should converge to) International Multicast, VoIP and MobileIP best supported over IPv6

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Pan-European Network

Core NetworkNetwork

Network

Switch at POP

Switch at POP

Switch at POP

Switch at POP

Switch at POP

Network withattachments at twoseparate locations

Site or network withattachment at one

location

PENProvider's end-to-end responsability

CPE at alocation servinga user ornetwork CPE at a second

location serving anetwork

CPE at a firstlocation serving anetwork

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What is PEN?

Pan European IP network service of the ATM sector which will ultimately carry all data and voice applications

A multi-protocol service (supporting both IPv4 and IPv6)

Initially likely to be limited to multi-protocol (IPv4/IPv6) data services acting as a core backbone interconnecting existing IP national networks

A scalable backbone capable of supporting multicast and voice at a later stage

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PENS Outlook and Timescales

2005-2009 X25 -> IP migration has started leading to a mixed X.25/IP environment

Additional ECIP and Implementing Rules to be further developed ANSP X.25 application/systems are being migrated to IP

June 2006: PEN Call for Interest January 2007: PEN Call for Tender January 2008: Deployment of PEN and operational evaluation/validation Summer 2008: initial IOC

2010+ : Application and Service extension Voice, A/G applications, International Multicast, ….

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OLDI communications have been adapted to TCP/IPand pre-operational trials were successful

Flight Message Transfer Protocol (based on IPv6)

AFTN/CIDIN is being migrated to AMHS over TCP/IP First operational link between Madrid and Frankfurt, IPv4 end-systems but IPv6 WAN

interconnectivity)

Surveillance distribution is converging to ASTERIX over IP This impacts surveillance systems (RMCDE, ARTAS, ModeS, ….)

CFMU/EAD/CRCO are based on IP

Voice services over IP are being evaluated by EUROCAE

Application Migration Status to IP

ECIPCOM

05

ECIPCOM

04

12/2007

12/2007

Single Sky

Implementing

Rule

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No immediate changes within ANSP IPv4 private networks who can migrate to IPv6 at their own pace

Build an IPv6 addressing scheme independent of ISPs, VPNs and topology

IPv4/ IPv6 dual-stack approach where possible Standard multi-protocol IP routers to resolve overlapping

IPv4 address space, co-existence of IPv4/IPv6 and support full migration to IPv6 (beyond 2010)

Make use of IPv4/v6 address translation techniques if necessary but highly recommend IPv6 end-to-end

IP and PEN

ACP/WGN/SG1#7 11

IPv6 Unicast Address Scheme

Following the iPAX-TF work, EUROCONTROL has become an LIR for allocation and assignment of IPv6 addresses on behalf of its stakeholders

3 13 13 3 13 16 64

FP TLA ID Sub-TLA Res. NLA ID SLA ID Interface ID

variable bits variable bits

F2Site

LocationLAN ESI

64 bits

Net.Prefix

5 bits7 bits

v4/v6

1 bit

F1

3 bits

ANSP Authority(80 bits)

Common Responsibilty(Coordination Body)

(16 bits)

3

RIPE Responsibilty(32 bits)

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IPv6 Address Example

EUROCONTROL has been allocated address 2001:4B50::/32

From this range, ROMATSA has been sub-allocated with 2001:4B50:0940::/42 which they can advertise at their border.

ROMATSA has then been assigned with /48 network prefixes to number their systems. These addresses are registered in the RIPE database and are indicated as being maintained by the EUROCONTROL Agency.

Sub-allocations have been planned for ANSPs, Airports, Pan-European users, Regional Networks, EUROCONTROL facilities.

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IPv6 Sub-Allocation Scheme

Organisation Network Prefix

Country /42

Inter-organisational links 2001: 4B50: 0040:

Albania (AL) ANTA 2001: 4B50: 0080:

Armenia (AM) ARMATS 2001: 4B50: 00C0:

Austria(AT) Austro Control 2001: 4B50: 0100:

Azerbaijan (AZ) AZANS 2001: 4B50: 0140:

Belarus (BY)$ BELAERONAVIGATSIA 2001: 4B50: 0180:

Belgium (BE) Belgocontrol 2001: 4B50: 01C0:

Bosnia and Herzegowina (BA) BHDCA 2001: 4B50: 0200:

Bulgaria (BG) ATSA Bulgaria 2001: 4B50: 0240:

Regional

Germany and Benelux CEATS 2001: 4B50: 1080:

Central Europe RAPNET 2001: 4B50: 10C0: European

Backbone (future provision) 2001: 4B50: 2080:

Eurocontrol Bretigny 2001: 4B50: 20C0:

Eurocontrol CFMU 2001: 4B50: 2100:

Eurocontrol CRCO 2001: 4B50: 2140:

Eurocontrol CSPDU 2001: 4B50: 2180:

Eurocontrol EURO HQ 2001: 4B50: 21C0:

Eurocontrol Luxembourg 2001: 4B50: 2200:

Eurocontrol Maastricht UAC 2001: 4B50: 2240:

.

.

.

ACP/WGN/SG1#7 14

ECIP Objective COM-04 (goodwill and only for international links)

SES Implementing Rule (legislation both international/national) FMTP rule is approved but pending final formatting prior its publication The Rule will mandate a EUROCONTROL Specification called FMTP Should be published summer 2006

FMTP ETIC Test Tool – version 3.0 supports both X.25 and TCP/IP Simulate systems’ communication partners Give an open access and a total control on all aspects of the protocol Send user- and protocol-defined messages Receive and process user- and protocol-defined messages Write and play an operational scenario Live monitoring and logging of all events ….

FMTP

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More information

Contact:

Eivan CERASIEmail: eivan.cerasi@eurocontrol.int

Telephone: +32 2 729 3791

EUROCONTROL Network SubDomain:http://www.eurocontrol.int/communications/public/standard_page/com_network.html