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ILNP
(Identifier Locator Network Protocol)
INDEX


Introduction
ILNPv6
Identifier & Locator
Mobility
Benefits
ILNP


Evolutionary Approach

Focus on Network and Transport Layer

ILNP as a concurrent system on the existing Internet infrastructure
ILNPv6


Can be seen as a set of 'extensions' to IPv6:
- Uses same packet format as IPv6 in network core.
- IPv6 core routers do not need to change.
- Incrementally deployable on IPv6 core.
- Backwards compatible with IPv6.
- Split 128-bit IPv6 address:
Locator(L) – 64-bit name for the subnetwork
Identifier(I) – 64-bit name for the host
IPv6 addresses and ILNPv6

IPv6(as per RFC4291)

001    Global routing
                            Subnet ID          Interface Identifier
           prefix



          IPv6 routing prefix           Same syntax, different Semantics
ILNPv6

                Locator                          Node Identifier

       same syntax and semantics
         as IPv6 routing prefix
IPv6 Packet Header
ILNPv6 Packet Header
Locators vs. Identifiers


Locator(L)
- Uses the existing “Routing Prefix” bits of an IPv6 address.
- names a single subnetwork
- topologically significant
- only used for routing and forwarding
Identifier(I)
- Replaces the existing “Interface ID” bits of an IPv6 address
- Names a node, not an interface
- Remains constant even if connectivity/topology changes
- only used by transport-layer(and above) protocols
Naming: IP vs. ILNP


   Protocol Layer                  IP            ILNP

    Application          FQDN or IP address     FQDN

     Transport                IP address       Identifier

      Network                 IP address        Locator

        Link                 MAC address      Mac address

                            Entanglement      Separation
* FQDN = fully qualified domain name
I-LV and Notation

I-LV(Identifier-Locator Vector)
Consists of a pairing of an Identifier value and a Locator value
Written as [I, L]

Notation
A = IP address
I = Identifier
L = Locator
P = Transport-layer port number
_L = Local
_R = Remote
Mobility

Host Mobility
- individual hosts may be mobile, moving across the Internet
  or boundary within an IP-based network
Network(Site) Mobility
- a whole site, IP subnetwork(s) may be mobile, moving across
  the Internet or boundary within an IP-based network

Mobility is implemented by enabling
- Locator values to be changed dynamically by a node
- use of Locator Updates to allow active sessions to be maintained
Host Mobility[1]

Site Network A

                         L_A
     H(1)        SBR_A
                                          • H(X)
                                            Host H at position X
                                          • L_A, B
     H(2)                      INTERNET     global Locator value
                                          • SBR
                                            Site Border Router
     H(3)                L_B
                 SBR_B

Site Network B
Host Mobility[2]


Immediate Handover
- the host sends LU messages to CNs, immediately stops using L_A
  and switches to using L_B only
Soft Handover
- the host sends LU messages to CNs, but it uses both L_A and L_B
  until it no longer receives incoming packets
Problem
If LU message is lost, high packet loss occurs
Network Mobility[1]


Site Network
                       SBR
                                 L_1
                         ra 0

     H                   ra 1                  ISP_1




         ILNP mobile network before handover
Network Mobility[2]


Site Network
                        SBR
                                 L_1           ISP_1
                         ra 0

     H

                                 L_2
                         ra 1                  ISP_2




         ILNP mobile network during handover
Network Mobility[3]

Site Network
                        SBR
                         ra 0

     H

                                 L_2
                         ra 1                 ISP_2




         ILNP mobile network after handover
Benefits


Support fully scalable multi-homing and mobility
Reduce overall size of the Internet’s global routing table
ILNP’s mobility approach
- eliminates the need for special-purpose routers
  (e.g., home agent and/or foreign agent now required by Mobile IP)
- eliminates "triangle routing" in all cases.
No changes are required to existing IPv6 (or IPv4) routers
ILNPv6 is fully backwards compatible with IPv6 (ILNPv4 is fully
backwards compatible with IPv4)
Thank you

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Ilnp

  • 3. ILNP Evolutionary Approach Focus on Network and Transport Layer ILNP as a concurrent system on the existing Internet infrastructure
  • 4. ILNPv6 Can be seen as a set of 'extensions' to IPv6: - Uses same packet format as IPv6 in network core. - IPv6 core routers do not need to change. - Incrementally deployable on IPv6 core. - Backwards compatible with IPv6. - Split 128-bit IPv6 address: Locator(L) – 64-bit name for the subnetwork Identifier(I) – 64-bit name for the host
  • 5. IPv6 addresses and ILNPv6 IPv6(as per RFC4291) 001 Global routing Subnet ID Interface Identifier prefix IPv6 routing prefix Same syntax, different Semantics ILNPv6 Locator Node Identifier same syntax and semantics as IPv6 routing prefix
  • 8. Locators vs. Identifiers Locator(L) - Uses the existing “Routing Prefix” bits of an IPv6 address. - names a single subnetwork - topologically significant - only used for routing and forwarding Identifier(I) - Replaces the existing “Interface ID” bits of an IPv6 address - Names a node, not an interface - Remains constant even if connectivity/topology changes - only used by transport-layer(and above) protocols
  • 9. Naming: IP vs. ILNP Protocol Layer IP ILNP Application FQDN or IP address FQDN Transport IP address Identifier Network IP address Locator Link MAC address Mac address Entanglement Separation * FQDN = fully qualified domain name
  • 10. I-LV and Notation I-LV(Identifier-Locator Vector) Consists of a pairing of an Identifier value and a Locator value Written as [I, L] Notation A = IP address I = Identifier L = Locator P = Transport-layer port number _L = Local _R = Remote
  • 11. Mobility Host Mobility - individual hosts may be mobile, moving across the Internet or boundary within an IP-based network Network(Site) Mobility - a whole site, IP subnetwork(s) may be mobile, moving across the Internet or boundary within an IP-based network Mobility is implemented by enabling - Locator values to be changed dynamically by a node - use of Locator Updates to allow active sessions to be maintained
  • 12. Host Mobility[1] Site Network A L_A H(1) SBR_A • H(X) Host H at position X • L_A, B H(2) INTERNET global Locator value • SBR Site Border Router H(3) L_B SBR_B Site Network B
  • 13. Host Mobility[2] Immediate Handover - the host sends LU messages to CNs, immediately stops using L_A and switches to using L_B only Soft Handover - the host sends LU messages to CNs, but it uses both L_A and L_B until it no longer receives incoming packets Problem If LU message is lost, high packet loss occurs
  • 14. Network Mobility[1] Site Network SBR L_1 ra 0 H ra 1 ISP_1 ILNP mobile network before handover
  • 15. Network Mobility[2] Site Network SBR L_1 ISP_1 ra 0 H L_2 ra 1 ISP_2 ILNP mobile network during handover
  • 16. Network Mobility[3] Site Network SBR ra 0 H L_2 ra 1 ISP_2 ILNP mobile network after handover
  • 17. Benefits Support fully scalable multi-homing and mobility Reduce overall size of the Internet’s global routing table ILNP’s mobility approach - eliminates the need for special-purpose routers (e.g., home agent and/or foreign agent now required by Mobile IP) - eliminates "triangle routing" in all cases. No changes are required to existing IPv6 (or IPv4) routers ILNPv6 is fully backwards compatible with IPv6 (ILNPv4 is fully backwards compatible with IPv4)