Network related topics

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Network related topics

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

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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

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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

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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

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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

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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

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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
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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

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BoD service in a heterogeneous network
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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

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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

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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.)!!!