Ground Based LISP For Multilink Operation

Transcription

1 Ground Based LISP For Multilink Operation A SESAR Solution ICAO WG-I Meeting FRQ

2 Agenda Introduction Base Procedures Multilink Seamless Operation Seamless Handover Access Network Summary FREQUENTIS 2015 Page: 2

3 Introduction : the motivations A concept that addresses key ATN/IPS requirements - Covers mobility and multi-homing - Minimizes the overhead traffic on the A/G datalinks - Supports Classes of Services Reduces the complexity in the aircraft : - Airborne router can assume that any ground system is reachable via every A/G router => default/static routing can be used on board - Routing/mobility can be managed on ground - No need for a routing/mobility protocol on board - Link selection can be supported on board with simple static policy (however dynamic policy can be added) Reduce complexity of deployment on ground: - Can be easily deployed over existing ground infrastructure - Can be based on COTS solutions - Can ease IPv4 to IPV6 transition issues Simple to understand - close to ATN/OSI addressing concepts, which will certainly help transition / duality of the ATN applications FREQUENTIS 2015 Page: 3

4 High Level System Architecture FCI FREQUENTIS 2015 Page: 4

5 Overview Elements and Functions IP/LDACS GW Security: Authentication of AR, Proof of Region Identity (Key material for Data Integrity/Privacy) ICAO Net Registering as normal (not roaming) EID (LISP Priority for Path Preference Incoming, EEM for Mapping Metric -> Priority) LISP Tunneling xtr L3 Static Routing Path Decision Outgoing Announcing Path Preference Incoming Airborne Router L2 Access Ground Router Air/Ground Router Ground/Ground Router LDACS fqu-fqd L3 Full IGP Routing IGP OSPF ICAO Net Announcing Metric based on Link Quality and Path Preference Incoming Terrestrial Region 1 SAT fqu-fqd LISP EID Space Terrestrial Region 2 LISP EID Space FREQUENTIS 2015 Page: 5 L2 Airplane IPv6 ICAO Net Z COTS IP Router WAN Infrastructure SAT L2-ID Z L2 IP/SATCOM GW Internetworking Region IGP SP LISP RLOC Space LISP Mapping Server Mapping Resolver AOC - ATS LISP EID Space and xtr22 announce Default Routes into region 2 to attract traffic destined to foreign IPv6 Nets (other regions)

6 Elements and (Airborne Router) (Access Ground Router) L2-ID X L2 L2 LDACS fqu-fqd Terrestrial Region 1 A / C LAN SATCOM fqu-fqd Terrestrial Region 2 AreoMACS Reg3 fqu-fqd AreoMACS SN Terrestrial Region 3 FREQUENTIS 2015 Page: 6

7 Multilink, Handover Scenario Handover IGP OSPF Terrestrial Region 1 LISP EID Space Internetworking Region LISP RLOC Space Airplane IPv6 ICAO Net Y Y / 128 LDACS L2-ID Y SAT L2-ID Y Multilink LDACS L2-ID Z Multilink Terrestrial Region 2 LISP EID Space AOC - ATS LISP EID Space SAT L2-ID Z Airplane IPv6 ICAO Net Z FREQUENTIS 2015 Page: 7

8 Agenda Introduction Base Procedures Multilink Seamless Operation Seamless Handover Access Network Summary FREQUENTIS 2015 Page: 8

9 Registration Phase (Security) t 2 t 1 Hello ICAO X, CR X, fqd r1, L2-X t 3 Proof LDACS Region 1, Int-Key X, fqu r1 L2-X t 4 LDACS Table Terrestrial EID LDACS L2-ID SEC t 5 Internetworking Region X Int-Key X AOC - ATS Suggestion for L3 and L2 addresses 128 bit L3 IPv6 address airplane: Net-ID: 32 bit Prefix / 24 bit ICAO ID / 8 bit Airplane Network Host-ID: 64 bit LDACS / SATCOM / AeroMACS Layer2-Identifier (L2-ID): Mapping of Net-ID or 24 bit ICAO-ID into L2 address of LDACS / SATCOM / AeroMACS Assumption about transport security radio link: After successful registration a secure communication over air is possible (integrity and optionally privacy) FREQUENTIS 2015 Page: 9

10 Location Announcement (Reachability) t 5 ICAO X, Pref. 1, Quality 1, fqd r1, L2-X By specifying preference and quality decides on which path upload traffic is wanted Preference 1, Quality 1 mapped by into OSPF metric E2 11 (External Summary LSA Type2) 2001::1:1 t 6 OSPF metric E2 11 mapped by LISP into LISP Priority with usage of Cisco EEM (Embedded Event Manager) t 7 OSPF E2 -> LISP PRIO via EEM xtr ::1:3 Site Registration EID RLOC PRIO t IGP Routing Table xtr ::1:1 E ::1:2 2001::1: AOC - ATS 2001::1:1 2001::1:3 44 Now all internal routers of know how to reach network within their domain!!! IGP Routing Table xtr ::1:1 E ::1:1 2001::1:4 55 FREQUENTIS 2015 Page: 10

11 Traffic to Location ICAO X (1) Site Registration 2001::1:1 EID RLOC PRIO t t 4 t ::1: t 1 AOC IPv6 -ES1 ATS-> IPv6 X t 5 Mapping Cache xtrx1 ES1 EID RLOC FREQUENTIS 2015 Page: 11

12 Traffic to Location ICAO X (2) t 12 L2-X fqu r1 IPv6 ES1 -> IPv6 X 2001::1:1 t ::1:3 t 8 t 11 LDACS Table Terrestrial EID LDACS L2-ID SEC X Int-Key X 2001::1: X.1 t 6 AOC IPv6 -ES1 ATS-> IPv6 X IGP Routing Table xtr ::1:1 E ::1:1 2001::1:3 44 t 9 ES1 Mapping Cache xtrx1 EID RLOC t FREQUENTIS 2015 Page: 12

13 Traffic from Location ICAO X to Ground (1) EID RLOC PRIO Net-ID part of IPv6 address ES1 is! IPv6 X -> IPv6 ES1 t 1 fqd r1, L2-X 2001::1:1 / X.1 11 / X.2 11 already registered 2001::1:5 t 4 t 3 t ::1: t 6 IGP Routing Table 2001::1:1 Default ::1:5 66 (xtr11) Default ::1:6 44 (xtr12) t ::1: X X.2 AOC - ATS Default routes were already announced by xtr11 and XTR12 EID Mapping Cache xtr12 RLOC t 7 ES1 / X.1 FREQUENTIS 2015 Page: 13

14 Traffic from Location ICAO X to Ground (2) t 8 IPv6 X -> IPv6 ES1 fqd r1, L2-X 2001::1:1 t t 12 t 9 IGP Routing Table 2001::1:1 Default ::1:5 66 (xtr11) Default ::1:6 44 (xtr12) 2001::1: X.1 t 13 IPv6 AOCX --> ATS IPv6 ES1 Mapping Cache xtr12 EID RLOC t 11 ES1 / X.1 FREQUENTIS 2015 Page: 14

15 Agenda Introduction Base Procedures Multilink Seamless Operation Seamless Handover Access Network Summary FREQUENTIS 2015 Page: 15

16 Multilink (1): Registration Phase Site Registration EID RLOC PRIO SATCOM L2-ID X Internetworking Region t 1 t 4 SATCOM Table Terrestrial EID SATCOM L2-ID SEC Push ICAO X, L2-ID X, Int-Key X t 2 Auth. OK? t 5 Auth. OK, Int-Key X t 3 AOC - ATS X Int-Key X FREQUENTIS 2015 Page: 16

17 Multilink (2): Location Announcement Site Registration SATCOM L2-ID X t 10 EID RLOC PRIO IGP Routing Table xtr ::2:1 E ::2:1 2001::2:x 77 t 6 t AOC - ATS t 8 IGP Routing Table xtr ::2:1 t ::2:1 E ::2:1 2001::2:y 55 FREQUENTIS 2015 Page: 17

18 Multilink (3a): Traffic To ICAO X Still Old Path L2-X fqu r1 IPv6 ES1 -> IPv6 X 2001::1:1 Site Registration EID RLOC PRIO SATCOM L2-ID X 2001::1: t IGP Routing Table xtr ::1:1 E ::1:1 2001::1:3 44 IGP Routing Table xtr ::1: ::2: AOC IPv6 -ES1 ATS-> IPv6 X ES1 Mapping Cache xtrx1 2001::1:1 E ::1:1 2001::1:4 55 EID RLOC FREQUENTIS 2015 Page: 18

19 Multilink (3b): Traffic From ICAO X Still Old Path IPv6 X -> IPv6 ES1 SATCOM L2-ID X fqd r1, L2-X 2001::1:1 2001::1: t 10 Site Registration EID RLOC PRIO / X.1 11 / X.2 11 IGP Routing Table 2001::1:1 2001::1: Default ::1:5 66 (xtr11) Default ::1:6 44 (xtr12) IPv6 AOCX --> ATS IPv6 ES1 Mapping Cache xtr12 EID RLOC 2001::2:1 ES1 / X.1 FREQUENTIS 2015 Page: 19

20 Multilink (4a): Seamless Switchover Site Registration EID RLOC PRIO SATCOM L2-ID X t IGP Routing Table xtr ::2:1 E ::2:1 2001::2:x 77 t 1 t AOC - ATS t 3 IGP Routing Table xtr ::2:1 t 2 EID Mapping Cache xtrx1 RLOC 2001::2:1 E ::2:1 2001::2:y 55 FREQUENTIS 2015 Page: 20 Now LISP Priority for Net X of Region 2 has changed (lower value)

21 Multilink (4b): Seamless Switchover t 6 ICAO X, Pref. 2, Quality 1, fqd r1, L2-X SATCOM L2-ID X 2001::1:1 t 7 Now LISP Priority for Net X of Region 1 has changed (higher value) OSPF E2 -> LISP PRIO via EEM t ::1: t 10 Site Registration EID Site RLOC Registration PRIO IGP Routing Table xtr ::1:1 E ::1:1 2001::1:3 44 t 8 IGP Routing Table xtr ::1:1 E ::1:1 2001::1: ::1: ::2: EID AOC - ATS Mapping Cache xtrx1 RLOC FREQUENTIS 2015 Page: 21

22 Multilink (4c): Seamless Switchover Site Registration 2001::1:1 EID RLOC PRIO SATCOM L2-ID X 2001::1: ::1: t ::2: EID AOC - ATS Mapping Cache xtrx1 RLOC FREQUENTIS 2015 Page: 22 t

23 Multilink (5): Traffic To ICAO X New Path Traffic from IPv6 ICAO X to 1 is a local decision of based on preference Site Registration 2001::1:1 EID RLOC PRIO SATCOM L2-ID X 2001::1: t ::1: t 15 t 18 SATCOM Table Terrestrial EID SATCOM L2-ID SEC X Int-Key X IGP Routing Table xtr ::2:1 E ::2: ::2:1 2001::2:y 55 FREQUENTIS 2015 Page: 23 t 16 t t 13 AOC IPv6 -ES1 ATS-> IPv6 X Mapping Cache xtrx1 EID RLOC t ES1

24 Multilink (6): Shutdown Link ICAO X, Pref. 99, Shutdown, fqd r1, L2-X t ::1:1 Site Registration EID RLOC PRIO SATCOM L2-ID X 2001::1:3 t t ::1: IGP Routing Table xtr ::1:1 E ::1:1 2001::1:3 44 IGP Routing Table xtr ::1:1 E ::1:1 2001::1: ::2: EID AOC - ATS Mapping Cache xtrx1 RLOC ES FREQUENTIS 2015 Page: 24

25 Agenda Introduction Base Procedures Multilink Seamless Operation Seamless Handover Access Network Summary FREQUENTIS 2015 Page: 25

26 Summary Key points of this concept: - Airborne Router: - Lightweight - No routing/mobility protocol -> simple default routing - Mobility/routing management delegated to ground systems - A/G router (Interface between access network and IPS Internetwork) - Access SN has to forward the link quality and preference to the LISP border router - LISP Border Router maps the link quality to the LISP Priority - Location announcement only when the aircraft leaves/enters the access network The Ground LISP concept is one of the two remaining proposals of the SESAR project, which is defining the FCI in Europe. FREQUENTIS 2015 Page: 26

27 Thank You For Your Attention Questions?