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Network related topics

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Title: Network related topics


1
Network related topics
  • Bartosz Belter, Wojbor Bogacki, Marcin Garstka,
  • Maciej Glowiak, Radoslaw Krzywania,
  • Roman Lapacz
  • FABRIC meeting
  • Poznan, 25 September 2006

2
Network related topics in WP2.1
  • To make the GRID gateway aware of the available
    transmission resources
  • To monitor the state of the network and use it as
    one of the decision criteria for the GRID gateway
  • To reserve the bandwidth needed for data
    transmission end secure the QoS parameters of the
    transmission

3
Quality of Service
  • Why QoS?
  • Applications sensitive to delay, delay variation
    or packet loss
  • Real time control from remote sites (astronomy,
    medicine) (synchronous, no packet loss)
  • Guaranteed capacity.
  • QoS parameters
  • one-way delay
  • one-way packet delay variation
  • capacity
  • packet loss

4
Tools for bandwidth reservations
  • Two network technologies available
  • IP routed transmission over GÉANT2 and NRENs
    (limited capacity, wide availability)
  • Dedicated lightpaths in GÉANT2 and other networks
    (unlimited capacity, limited availability)
  • Different tools for bandwidth reservations in the
    two technologies
  • AMPS for Premium IP Service in IP routed networks
  • BoD for optical networks
  • Both tools developed by GN2 project for
    implementation in GÉANT and NRENs

5
Premium IP and AMPS
  • Premium IP service
  • Premium IP traffic has priority over other
    traffic (best-effort)
  • Premium IP traffic gets the best possible QoS
    parameters
  • The amount of Premium IP traffic on a given link
    must be limited
  • Service must be booked in advance
  • Advance Multi-domain Provisioning System (AMPS)
  • Federated resource reservation system for Premium
    IP
  • Multidomain - an authenticated and authorized
    client can, via a single request, reserve an
    end-to-end path across multiple federated domains

6
Advance Multi-domain Provisioning SystemFeatures
  • Service Oriented Architecture
  • Web Services technology in use interfaces
    specified in XML
  • Services
  • Inter-domain Provisioning Service (multi-domain)
  • Intra-domain Provisioning Service (single-domain)
  • Network Information System (Layer 3 Topology) /
    Pathfinder Service
  • Policy Service
  • Multi-domain peer-to-peer federated architecture
  • Domains aware of their neighbours only
  • Trust relationship established between AMPS
    neighbours
  • Transaction Management
  • One-Phase-Commit

7
Multidomain Premium IP current status and plans
  • AMPS version 2.0
  • Operational in GÉANT2 (mutli-domain ready)
  • Premium IP Pilot Service to be ready soon
  • ARNES, HEAnet, LITNET, RENATER
  • NRENs plans

Status DiffServ/QoS Multi-domain PIP
Current 12 -
Future (Essential) 4 6
Future (Possible) 5 6
Will follow other NRENs 5 9
No interest 3 6
Source TERENA 2005 Compendium
8
Optical networks and Bandwidth on Demand
  • Optical transmission is available in part of
    GÉANT2 (GÉANT service) and in some NRENs
  • Users transmission directly on optical network
    (without IP routing)
  • Access interfaces Gigabit Ethernet, 10Gigabit
    Ethernet, SDH
  • Bandwidth up to 10Gbps for a single connection
  • Advanced reservation needed
  • Bandwidth on Demand (BoD) service developed in
    GÉANT2 for automatic reservations and
    provisioning of bandwidth in multiple
    technologies
  • GFP over SDH, L2 MPLS VPN, Native Ethernet,
    Premium IP
  • BoD service is under development (not available
    yet but prototype already tested)
  • BoD service will allow for a single reservation
    for multiple domains

9
BoD service in a heterogeneous network
10
Network monitoring and measurement- PerfSONAR
  • Developed by GN2 project, Internet2 (USA), ESnet
    (USA), RNP (Brasil), University of Delavare
  • Infrastructure for network performance
    monitoring, making it easier to solve end-to-end
    performance problems on paths crossing several
    networks.
  • Set of services delivering performance
    measurements in a federated environment.
  • Well-defined common interface to
    measurement/monitoring services is a network
  • Implemented services ping (round trip time),
    iperf (throughput), ovamp (one way delay) others
    under preparation
  • Data repository for historical data
  • Measurement points in a network measurements can
    be triggered by user/application
  • First measurements points already implemented in
    GÉANT2

11
Implementation example- CLUSTERIX
  • Polish national research project started at the
    end of 2003
  • To create productive, efficient and secure GRID
    environment
  • 12 local clusters connected via national network
    (dedicated 1GE links)
  • PSNC is leading network related task including
    active measurement and monitoring
  • The result an integrated tool able to track and
    show the status of the network
  • Measurement agents controlled by a central
    manager
  • Two types of agents backbone agents (in the
    network core) and local agents (withing computing
    clusters)
  • Five network parameters are collected packet
    round-trip time, jitter, loss, packet reordering,
    packet duplications
  • Applications have access to the measured values
    but they do not trigger measurements

12
Conclusions
  • Our goal to develop a network module for the
    GRID gateway with interfaces to the services
    which are available in the network
  • The module will make the GRID gateway aware of
    the status of the network and will interface the
    management plane of the network to ensure the
    needed transmission parameters
  • Requirements for data transmission must be
    specified (bandwidth requirements, number of
    simultaneous transmissions, duration of a single
    transmission etc.)!!!
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