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End Host Mobility Use Cases for LISP. draft- hertoghs -lisp-mobility-use- cases Yves Hertoghs Marc Binderberger. Overview. Use Case Draft for LISP for network-assisted host mobility 7 Use Cases

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End host mobility use cases for lisp

End Host Mobility Use Cases for LISP

draft-hertoghs-lisp-mobility-use-cases

Yves Hertoghs

Marc Binderberger


Overview
Overview

  • Use Case Draft for LISP for network-assisted host mobility

  • 7 Use Cases

    • Mobility when subnet is L2 extended (non-LISP technology) across LISP sites (EID = IPv4/6 address)

    • IP Mobility across subnets/LISP sites (EID = IPv4/6 address

    • Layer 2 Mobility/Extension using LISP (EID = MAC-Address)

    • A Combination of 1 and 3 : (EID = IPv4/6 address for inter-subnet, EID = MAC for intra-subnet)

    • Unified L2/L3 LISP: Use EID = IPv4/6 for all IP Mobility (intra and intersubnet), Use EID = MAC-Address for all non-IP traffic

    • Multi-hop variant of 1 : Mobility detection and LISP signalling are one or more L3 hops apart

    • Multi-hop variant of 2 : Mobility detection and LISP signalling are one or more L3 hops away


1 lisp ip mobility extended subnets
1. LISP IP Mobility Extended Subnets

Remote LISP site W

Remote NON-LISP site

LISP xTR

RLOC Namespace

LISP PxTR

LISP xTR

LISP xTR

EID Prefix ‘A’

LISP Site Z

L2 Extension

EID Prefix ‘A’

LISP Site Y

Host_1

EID = IP

Host Move


2 lisp ip mobility across subnets
2. LISP IP Mobility Across Subnets

Remote LISP site W

Remote NON-LISP site

LISP xTR

RLOC Namespace

LISP PxTR

LISP xTR

LISP xTR

EID Prefix ‘B’

LISP Site Z

EID Prefix ‘A’

LISP Site Y

Host_1

EID = IP

Host Move


3 lisp mac layer mobility lisp as layer 2 extension
3. LISP MAC-Layer Mobility (LISP as Layer 2 extension)

RLOC Namespace

LISP xTR

LISP xTR

L2 Domain ‘A’

LISP Site Z

L2 Domain ‘A’

LISP Site Y

Host_1

EID = MAC

Host Move


4 lisp combined l2 l3 mobility
4. LISP Combined L2/L3 Mobility

Remote LISP site W

Remote NON-LISP site

LISP xTR

RLOC Namespace

LISP PxTR

LISP xTR

LISP xTR

EID Prefix ‘A’

LISP Site Z

EID Prefix ‘A’

LISP Site Y

Host_1

EID = MAC

EID = IP

Host Move


5 lisp unified l2 l3 mobility
5. LISP Unified L2/L3 Mobility

Remote LISP site W

Remote NON-LISP site

LISP xTR

RLOC Namespace

LISP PxTR

LISP xTR

LISP xTR

EID Prefix ‘A’

LISP Site Z

EID Prefix ‘A’

LISP Site Y

Host_1

EID = IP

(EID = MAC

for non-IP)

Host Move


Unified l2 l3 lisp xtr
Unified L2/L3 LISP xTR

  • First hop device is a LISP xTR, and the default gateway for all traffic

    • Default Gateway identity (MAC/IP address) is the same per subnet independent of location

  • Offers simultaneous support for IP and non-IP traffic, independent of subnets and location.

    • IP and MAC EID’s are registered to support IP.

    • MAC EIDs are registered to support non-IP (when needed)

    • Forwarding of all IP traffic involves an IP lookup (intra- and inter-subnet/LISP IID traffic), forwarding on non-IP involves a MAC lookup.

    • Registering both IP and MAC addresses for IP aids ARP/IPv6 ND handling as well as rewrites to allow transparency for intrasubnet IP forwarding from a host perspective.

  • Why?

    • Optimal forwarding for IP traffic, no traffic tromboning independent of End-station location, or intra- versus inter subnet/LISP IID.

    • Single lookup for IP traffic independent of destination

    • No need for network wide broadcast domains to achieve Mobility intra-subnet


Multihop mobility
Multihop Mobility

  • Decoupling of Host-Detection and LISP Signaling

  • Can cater for extended subnet and across subnet use cases (1 and 2)


Request to wg
Request to WG

  • Consider this draft as a Use Case for LISP

  • Consider this draft as input for potential future development of the LISP protocol

  • Request comments and eventually move to WG Draft