RINA overview and ongoing research in EC-funded projects, ISO SC6 WG7
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Investigating RINA as an Alternative to TCP/IP
Future Network Architectures
Recursive Internet Architecture (RINA) Dimitri Staessens – Ghent Uni. iMinds (BE)
Francesco Salvestrini – Nextworks s.r.l. (IT)
Miquel Tarzan – Fundació i2CAT (ES)
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Challenges faced by (Inter)network
engineers
• explosion in the complexity of the overall system (hundreds of protocols and thousands of standards documents)
• weak security
• scalability issues with the routing system – (IPv6/BGP multihoming)
– Mobile end-users
• no QoS support
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The Internet is a live environment
• ever growing customer base
• ever growing number of devices
• new and more demanding services
• RAD of services • fast deployment
• “whac-a-mole” approach
to problemsolving
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RINA
A brief introduction to the Recursive Internet Architecture
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Mgt. Tasks
Application Process
Components
• Application specific tasks
• Management tasks
Application Specific Tasks
Rendering Game engine
Memory mgt
Task scheduling
Mechanism
• Static, invariant parts
Policy
• Dynamic, variant parts
• occurs in pairs – Sender
– Receiver
IPC RIB
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Distributed Application
X
Y
X X
Y X X X
Processing system: hardware and software capable of executing programs as Application Processes that can coordinate via shared memory (“test and set”) Computing system: a collection of processing systems under the same management domain with no restrictions on connectivity 6
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Mgt. Tasks
Application Process
Components
• Application specific tasks
• Management tasks
• IPC Management tasks – DIF Allocator: Finds remote
application processes
– IRM: manages DA requests
– Multiplexing: SDU’s from different tasks
– SDU protection: Integrity and security
IPC Resource Manager
DIF Allocator SDU
Protection
Multiplexing
IPC Mgt. Tasks
Application Specific Tasks
Rendering Game engine
Memory mgt
Task scheduling
IPC RIB
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Distributed Applications Provide
IPC services
host host Edge router Edge router Internal AS router
X Y Common Distributed Application Protocol
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Common Distributed Application
Protocol (CDAP)
• Perform operations on RIB objects
– Create/Delete
– Read/Write
– Start/Stop
• But what about different applications?
– The objects they manipulate
– Control and sequencing of operations
– …
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Distributed Applications Provide
IPC services
host host Edge router Edge router Internal AS router
X Y
A1 A2 B1 B2
C2 C1 E1 E2
F1 F2 F3 F4
D1 D3 D2
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Effectively extending the IPC model
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IPC API
• APs communicate using a port, identified by a portId
• 6 operations:
– int _registerApp(appName, List<difName>)
– portId _allocateFlow(destAppName, List<QoSParams>)
– int _write(portId, sdu)
– sdu _read(portId)
– int _deallocate(portId)
– int _unregisterApp(appName, List<difName>)
• QoSParams are defined in a technology-agnostic way
– Bandwidth-related, delay, jitter, in-order-delivery, loss rates, …
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The IPC process
IPC
Process
IPC API
Data Transfer Data Transfer Control Layer Management
SDU Delimiting
Data Transfer
Relaying and Multiplexing
SDU Protection
Transmission Control
Retransmission Control
Flow Control
RIB Daemon
RIB CDAP Parser/Generator
CACEP
Enrollment
Flow Allocation
Resource Allocation
Forwarding Table Generator
Authentication
State V
ecto
r State
Ve
ctor
State V
ecto
r
Data Transfer Data Transfer
Transmission Control
Transmission Control
Retransmission Control
Retransmission Control
Flow Control Flow Control
Appl.
Process
IPC Resource
Mgt.
DIF Allocator
SDU Protecti
on
Multiplexing
IPC Mgt. Tasks
Other Mgt. Tasks
Application Specific Tasks •Authentication of all processes •RIB Daemon manages state objects •EFCP protocol performs SDU transport
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Error and Flow Control Protocol
• DTP
– Fragmentation
– Reassembly
– Sequencing
– Concatenation
– Separation
• DTCP
– Transmission control
– Retransmission control
– Flow control
• Loosely coupled by a state vector
• Based on Delta-t
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Delta-t (Watson, 1981)
• Developed at L.Livermore labs, unique approach.
– Assumes all connections exist all the time.
– keep caches of state on ones with recent activity
• Watson proves that the conditions for distributed synchronization are met if and only if 3 timers are bounded:
– Maximum Packet Lifetime: MPL
– Maximum number of Retries: R
– Maximum time before Ack: A
• That no explicit state synchronization, i.e. hard state, is necessary. – SYNs, FINs are unnecessary
• 1981:Watson shows that TCP has all three timers and more.
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RMT
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Shims
• Wrap a technology with the IPC API
– Physical medium
– Legacy technology
• Ethernet
• IP
– Hypervisors
• Not required to add functionality
• So it’s an “incomplete” DIF
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Basic concept of RINA
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Bootstrapping a RINA network
host host Edge router Edge router Internal AS router
X Y
A1 A2 B1 B2
C2 C1 D2 D1 D3 E1 E2
F1 F2 F3 F4
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Architectural Model
DIF
System (Host)
IPC
Process
Shim IPC
Process
Mgmt
Agemt
System (Router)
Shim IPC
Process
Shim IPC
Process
IPC
Process
Mgmt
Agemt
System (Host)
IPC
Process
Shim IPC
Process
Mgmt
Agemt
Appl.
Process
Shim DIF
over TCP/UDP
Shim DIF
over Ethernet
Appl.
Process
IPC API
Data Transfer Data Transfer Control Layer Management
SDU Delimiting
Data Transfer
Relaying and Multiplexing
SDU Protection
Transmission Control
Retransmission Control
Flow Control
RIB Daemon
RIB CDAP Parser/Generator
CACEP
Enrollment
Flow Allocation
Resource Allocation
Forwarding Table Generator
Authentication
State V
ecto
r State
Ve
ctor
State V
ecto
r
Data Transfer Data Transfer
Transmission Control
Transmission Control
Retransmission Control
Retransmission Control
Flow Control Flow Control
IPC Resource
Mgt.
DIF Allocator
SDU Protecti
on
Multiplexing
IPC Mgt. Tasks
Other Mgt. Tasks
Application Specific Tasks
Increasing timescale (functions performed less often) and complexity 21
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PROTOTYPES
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Pre-existing prototypes
• The first RINA prototype dates back in 2012
• This first implementation was a joint development of BU, i2CAT and WIT-TSSG – Targeting the validation of the theory and specs
– Java based, user-space
• TRIA LLC (US) built another (closed-source) prototype (C based, user-space)
• Later: – EC funded FP7 IRATI and PRISTINE projects to advance the research on RINA
– GEANT showed interest in RINA as well, funding the IRINA project
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FP7 IRATI – OVERVIEW
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IRATI - Introduction
• FP7 Project – Jan 2013 to Dec 2014 (2 years)
• 4 partners
– [Research] Fundació Privada i2CAT (Spain)
– [Research] iMinds VZW(Belgium)
– [SME] Nextworks s.r.l. (Italy)
– [Industry] Interoute (UK/Italy)
– [Academia] Boston University (US)
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IRATI – Objectives
• IRATI’ objectives: 1. Enhancement of the RINA architecture reference model and specifications,
focusing on DIFs over Ethernet
2. RINA open source prototype over Ethernet for a UNIX-like OS 3. Experimental validation of RINA and comparison against TCP/IP
4. RINA prototype for Hypervisors
5. Interoperability with the PSOC RINA prototype over UDP/IP 6. Provide feedback to OFELIA in regards to the prototyping of a clean slate
architecture
• The project targets the design and implementation of core functionalities at processing system level: – IPC Process / IPC Manager daemons
– Transport and management layer
• Software-wise, the project: – Built a RINA SW prototype from scratch [ready]
– Release it as FOSS [end of October] – tries to build up an Open Source community around the prototype
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IRATI - Design decisions & fast/slow paths
• We split the RINA architecture in different “lanes”
– Stringent timings → Fast-path → kernel-space [TRANSPORT LAYERS]
– loose timings → Slow-path → user-space [MANAGEMENT LAYERS]
• Placing SW components on different lanes, depending on their timing
requirements
User Kernel
User Kernel
1
IPC Process Daemon IPC Process
Daemon
Application Application
Application Application
N
M
User Kernel
1
IPC Manager Daemon
Kernel
Application
IPC Process Daemon
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FP7 IRATI – KERNEL SPACE (THE TRANSPORT LAYERS)
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The kernel-space HL SW arch
API Mux/Demux
KIPCM
IPCP Factories
KFA
EFCP RMT PFT
Normal IPC P.
Fram
ewo
rk
RNL
Netlink syscalls
User space
shim-eth-vlan
RINA-ARP
shim-dummy
kernel IPCP Instances
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KIPCM & KFA
Normal IPCP
EFCP
RMT
OUT IN
KIPCM KFA
PDU-FWD-T
User space
syscalls Netlink
Shim IPCP
• The KIPCM – Manages the lifecycle the IPC Processes and KFA
– Abstract IPC Process instances
• Same API for all the IPC Processes
• Regardless the type
• maps: ipc-process-id → ipc-process-instance
• The KFA – Manages ports and flows
– Ports
• Flow handler
• Port ID Manager
– Flows
• maps: port-id → ipc-process-instance
• KIPCM + KFA
• Decouple user-interface from IPC Processes
• Are the Initial point where “recursion” is transformed into “iteration”
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IPC Process Instances & Factories
• There are two “major” types of IPC Processes: – Normal (EFCP + RMT …)
– Shims
• The interface is the same regardless of their type
• Each IPC Process implements its “core” details: – Normal IPC Processes:
• The stack provides the implementation for all of them
– Shim IPC Processes:
• Each Shim IPC Processes provide its implementation
• IPC Process instances are created via “templates”, instantiated by IPC Process Factories (OOD/OOP)
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IRATI – The Shims IPCs
• The shims are the “lowest” components in the stack
• They have one interface:
– North-Bound: The IPC API (as all the other IPC Processes)
• They wrap the underlying technology (e.g. 802.1Q)
• There are currently 4 shims available:
– shim-eth-vlan:
• As defined in the spec, runs over 802.1Q
– shim-hv:
• Targets hypervisor-based environments (KVM/Qemu and Xen)
• Allows removing unnecessary layering commonly used in traditional VM/HV environments (e.g.
bridges, virtual-NICs), such layers ease the adoption BUT:
– Reduce performances
– Increase maintenance costs
– shim-tcp-udp
• Targets RINA over TCP/UDP
– shim-dummy:
• Not a “real” shim, it’s for debugging/testing purposes
• It’s a sort of “loopback” shim (i.e. confined into a single host)
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Normal IPC Process - instance
EFCP Container - instance
(S|P)DUs workflows
NetlinkSession EFCP Instance
RMT - instance
PDU-FWD-T
Core O
I
Shim IPC Process instance
Normal IPC Process - instance
EFCP Container - instance
NetlinkSession EFCP Instance
RMT - instance
PDU-FWD-T
Core
I
O
Shim IPC Process instance
KIPCM / KFA
User space
User space
Queue Queue
Queue
Queue Queue
Queue
DTP DTCP
DT
DTP DTCP
DT
KIPCM / KFA
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FP7 IRATI – USER SPACE (LAYER MANAGEMENT)
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IPC Process & IPC Manager daemons
• IPC Manager Daemon (as an OS process) – Manages the IPC Processes lifecycle
– Broker between applications and IPC Processes
– Local management agent
– DIF Allocator client (to search for applications not available through local DIFs)
• IPC Process Daemon (as an OS process) – Layer Management components of the IPC Process
• RIB Daemon, RIB
• CDAP parsers/generators
• CACEP
• Enrollment
• Flow Allocation
• Resource Allocation
• PDU Forwarding Table Generation
• Security Management
• These daemons:
– Run as separate OS processes
– Rely on a common framework (librina)
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User space HL SW arch
Application A
Application A
Normal IPC Process (Layer Management)
Kernel
User space
Netlink sockets
IPC Process Daemon
RIB & RIB Daemon
librina
Resource allocation
Flow allocation
Enrollment
PDU Forwarding
Table Generation
System calls Netlink sockets
Sysfs
IPC Manager Daemon
RIB & RIB Daemon
librina
Mgmt agent
DIF Allocator
Main logic
System calls
Netlink sockets
Sysfs
Application A
librina
Application logic
System calls
Netlink sockets
1
N
M
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Prototype’ performances
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FP7 PRISTINE – OVERVIEW
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PRISTINE - Intro
• FP7 Project
– Starts Jan 2014, ends Dec 2016 (3 years)
– 15 Partners (Research, SMEs and Industry)
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PRISTINE - Objectives
• Design and implement the innovative internals of the RINA
architecture that include the programmable functions for:
• security of content and application processes,
• supporting QoS and congestion control in aggregated levels,
providing protection and resilience, facilitating more efficient
topological routing
• multi-layer management for handling configuration,
performance and security.
• Demonstrate the applicability and benefits of this approach and
its built-in functions in three use-cases
• Datacenter, Distributed cloud, Carrier network
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PRISTINE – (SW) Outcomes
• PRISTINE will be: – Developing a Software Development Kit (SDK):
• From the IRATI prototype sources-base
• Enable to customize the behaviour of the DIFs
• Allow to plug-in/out policies dynamically – Policies in the transport layer – Policies in the management layers
– Developing innovative policies • New policies, defined in the project will be: developed, tested and
integrated
– Developing the first DIF Management System (DMS) • Manages the DIFs in multiple Processing Systems (same administrative
domain)
– IPC Process and IPC Manager daemons enhancements • Management Agent
– Coordinates the loading/installation/removal/unloading of policies in the Processing System
• Reliability aspects
• Measurements
• Performances
• …
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GEANT3+ IRINA – OVERVIEW
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IRINA - Intro
• Investigating RINA as the next generation GEANT and
NREN network architecture (IRINA)
• GEANT3+ project
– Starts Oct 2013, ends March 2015 (18 months)
• 4 Partners:
– [Research] iMinds VZW(Belgium)
– [Research] Fundació Privada i2CAT (Spain)
– [Research] Waterford Institute of Technology –
Telecommunications Software & Systems Group (Ireland)
– [SME] Nextworks s.r.l. (Italy)
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IRINA - Objectives
• Proposes to study RINA as the foundation of the next generation NREN and GEANT network architectures.
• Targets the following goals: – Make a comparative study of RINA vs. the current networking SoTA and
the most relevant clean-slate architectures under research.
– Perform a use-case study of how RINA could be better used in the NREN scenario • considering different deployment options, and illustrating the benefits that
RINA can bring in terms of multi-homing, mobility, quality of service, programmability, virtualization and network management.
– Showcase a lab trial of the use-case study • Utilizing a customized version of the FP7 IRATI stack, and the experimental
facilities contributed by the project partners.
– Involve the NREN and GEANT community in the different steps of the project, in order to discuss the project approach, the findings and to get valuable feedback. • The organization of a network architectures workshop in cooperation with
GN3+ JRA1 will be a key instrument to achieve this objective.
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IRINA – Overview/Objectives
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STANDARDISATION
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ISO and RINA
• RINA addresses concerns identified by FN:
“Even though the current Internet is such an essential infrastructure, we see that there are many concerns about
the following technical aspects of the current Internet,
including IP based networks: scalability, ubiquity, security,
robustness, mobility, heterogeneity, Quality of Service (QoS), re-configurability, context-awareness, manageability,
economics, etc.”
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RINA specifications status (I)
• RINA IPC Specification Reference Model
– Basic concept of distributed systems
– Distributed applications
– Distributed InterProcess Communication (IPC API)
• DAF Base Specifications
– Common Application Establishment Phase
– Common Distributed Application Protocol
– IPC Resource Manager Specification
– DIF Allocator Specification
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RINA specifications status (II)
• DIF Base Specifications – Data Transfer Service Definition
– Specification template for a Generic DIF Delimiting module
– Error and Flow Control Protocol Specification (DTP + DTCP)
– Relaying and Multiplexing Task Specification
– Specification Template for a DIF SDU Protection Module
– Specification Template for a Generic DIF SDU Protection Module
– Basic Enrollment Specification
– Flow Allocator Specification
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RINA specifications status (and III)
• Policy Specifications
– CRC 16 SDU protection module
– DIF HDLC like SDU protection
– DIF TCP UDP like SDU protection module
– Retransmission timer expiry policy for a TCP like DIF
– Round Trip Time (RTT) estimator policy for a TCP like DIF
– Delimiting module for operating over the public Internet
– Delimiting module for demo DIF
• Pro-forma for policy specifications
– No need to standardise everything
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Shims
• Shim-eth-vlan
• Shim-tcp-udp
• Shim-hv
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Upcoming workshops
• Globecom Workshop “Alternatives to TCP/IP”
– 8-12 December, Austin TX US
• RINA workshop
– 28-29 January 2015, Ghent Belgium
• TERENA TNC 2015
– 15-18 June, Porto, Portugal
• Summer school ~ August 2015
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