NANOG Meeting Presentation Abstract

Strategies of packet buffering inside Routers
Meeting:	NANOG65
Date / Time:	2015-10-07 2:30pm - 4:00pm
Room:	Duluth & Mackenzie
Presenters:	Speakers: Rafal Szarecki, Juniper Networks Rafal Szarecki (JNCIE 136) has 19 years of experience in networking industry. He has started his career working for ISP in Poland as Network Operation Centre stuff member in 1996. Later in his career he work in Customer Support consultant and then as Network Architect in Ericsson. In 2006 Rafal joined Juniper Networks Professional Services Team and later become Principal Consultant. He has worked on over 50 different projects, with more then 20 Telecoms and ISP including some of global reach such British Telecom, Telefonica, Telenor. He designed and/or helped in deployment over 20 networks in multiple countries in Europe and Middle East. During this time he was also active member of PLNOG. Currently Rafal held position of Solution Architect in Routing Product Team in Juniper Networks in Sunnyvale, CA.
Abstract:	In this talk I describe buffering architecture, starting form shared memory used in devices build around single centralized switch (SoC) and then focusing on distributed architectures more common used in today's routers. The OQ, IQ, VoQ and CIOQ buffering strategies are described and explained, following by strengths and limitation of each. Finally impact of chosen architecture on ASIC design would be briefly evaluated. The intention is to provide knowledge about foundation of routers system architecture, that could be useful to troubleshoot certain network events that manifest as packet loss somwhere inside router. The whole talk is based on theoretical models, not related to any specific vendor's product. However each product follows (w/ some deviation) one of discussed model - so knowledge provided would be relevant to operation of this product and understand their internal as well as deviation in behavior of different product when exposed to the same traffic.
Files:	Strategies of packet buffering inside Routers(PDF) Strategies of packet buffering inside Routers
Sponsors:	None.

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NANOG65 Abstracts

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• Conference Opening
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  Tony Tauber, Comcast; Christian S. TacitTorIX; .
  Philippe Couture, Videotron; Clinton Work, TELUS;

• Conference Opening
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  Tony Tauber, Comcast; Christian S. TacitTorIX; .
  Philippe Couture, Videotron; Clinton Work, TELUS;

• Conference Opening
  Speakers:
  Tony Tauber, Comcast; Christian S. TacitTorIX; .
  Philippe Couture, Videotron; Clinton Work, TELUS;

• Conference Opening
  Speakers:
  Tony Tauber, Comcast; Christian S. TacitTorIX; .
  Philippe Couture, Videotron; Clinton Work, TELUS;

• NANOG 65 Keynote Address
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• Your Bitcoins or Your Site: An Analysis of the DDoS for Bitcoins (DD4BC) DDoS Extortion Campaign.
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• The many uses of NetFlow and flow-like data
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• NANOG Board Candidates
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  William CharnockPacketFabric; .
  

• DNS Track
  Speakers:
  Geoff HustonAPNIC; .
  Duane Wessels, VeriSign; Keith MithcellDNS-OARC; .
  Brian SomersOpenDNS ; .
  Ray BellisInternet Systems Consortium; .
  Eddie Winstead.
  Tomas HlavacekCZ.NIC; .
  

• Data Center Track
  Moderators:
  Gabe Cole, RTE Group, Inc.;

• DNS Track
  Speakers:
  Geoff HustonAPNIC; .
  Duane Wessels, VeriSign; Keith MithcellDNS-OARC; .
  Brian SomersOpenDNS ; .
  Ray BellisInternet Systems Consortium; .
  Eddie Winstead.
  Tomas HlavacekCZ.NIC; .
  

• DNS Track
  Speakers:
  Geoff HustonAPNIC; .
  Duane Wessels, VeriSign; Keith MithcellDNS-OARC; .
  Brian SomersOpenDNS ; .
  Ray BellisInternet Systems Consortium; .
  Eddie Winstead.
  Tomas HlavacekCZ.NIC; .
  

• DNS Track
  Speakers:
  Geoff HustonAPNIC; .
  Duane Wessels, VeriSign; Keith MithcellDNS-OARC; .
  Brian SomersOpenDNS ; .
  Ray BellisInternet Systems Consortium; .
  Eddie Winstead.
  Tomas HlavacekCZ.NIC; .
  

• DNS Track
  Speakers:
  Geoff HustonAPNIC; .
  Duane Wessels, VeriSign; Keith MithcellDNS-OARC; .
  Brian SomersOpenDNS ; .
  Ray BellisInternet Systems Consortium; .
  Eddie Winstead.
  Tomas HlavacekCZ.NIC; .
  

• DNS Track
  Speakers:
  Geoff HustonAPNIC; .
  Duane Wessels, VeriSign; Keith MithcellDNS-OARC; .
  Brian SomersOpenDNS ; .
  Ray BellisInternet Systems Consortium; .
  Eddie Winstead.
  Tomas HlavacekCZ.NIC; .
  

• DNS Track
  Speakers:
  Geoff HustonAPNIC; .
  Duane Wessels, VeriSign; Keith MithcellDNS-OARC; .
  Brian SomersOpenDNS ; .
  Ray BellisInternet Systems Consortium; .
  Eddie Winstead.
  Tomas HlavacekCZ.NIC; .
  

• NetDevOps - Ansible 101 to network nirvana
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• NetDevOps - Ansible 101 to network nirvana
  Speakers:
  Bronwyn Lewis, Packet Clearing House; Matt Peterson, Cumulus Networks;

• Demystifying Pros & Cons of large Scale BGP RR deployments
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• DDoS Tutorial
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• Security Track
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• Wi-Fi: Fundamentals, Design and Troubleshooting
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• 10 Weird (and Possibly Useful) Things You Didn't Know about International Networks
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• Monitor BGP using open source OpenBMP and Apache Kafka
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• Building a smallish DC...for the rest of us
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• Running MPLS efficiently in ring networks
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• BGPuma -- Border Gateway Protocol Update Metric Analysis
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• Whack-a-Mole Routing: The effects of ISP Traffic Engineering on Non-ISP Networks
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• Distributed Route Aggregation on the Global Network (DRAGON)
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• Cloudy with a chance of Breach: Forecasting Cyber Security Incidents
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• Optimal routing vs. Route Reflector VNF - reconcile the fire with water
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• The future of North American Regional BCOP
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• The future of North American Regional BCOP
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• Lightning Talks
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• Peering Track
  Moderators:
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  Jon Nistor, TorIX;

• Strategies of packet buffering inside Routers
  Speakers:
  Rafal Szarecki, Juniper Networks;

• Peering Track
  Moderators:
  Sylvie LaPerriere, Google Inc.; Patrick Gilmore, Markley Group; Panelists:
  David E. Young, Verizon; Hank Hultquist, AT&T; Joseph Cavender, Level 3 Communications; Speakers:
  Jon Nistor, TorIX;

• Peering Track
  Moderators:
  Sylvie LaPerriere, Google Inc.; Patrick Gilmore, Markley Group; Panelists:
  David E. Young, Verizon; Hank Hultquist, AT&T; Joseph Cavender, Level 3 Communications; Speakers:
  Jon Nistor, TorIX;

• Peering Track
  Moderators:
  Sylvie LaPerriere, Google Inc.; Patrick Gilmore, Markley Group; Panelists:
  David E. Young, Verizon; Hank Hultquist, AT&T; Joseph Cavender, Level 3 Communications; Speakers:
  Jon Nistor, TorIX;

• Peering Track
  Moderators:
  Sylvie LaPerriere, Google Inc.; Patrick Gilmore, Markley Group; Panelists:
  David E. Young, Verizon; Hank Hultquist, AT&T; Joseph Cavender, Level 3 Communications; Speakers:
  Jon Nistor, TorIX;

• Peering Track
  Moderators:
  Sylvie LaPerriere, Google Inc.; Patrick Gilmore, Markley Group; Panelists:
  David E. Young, Verizon; Hank Hultquist, AT&T; Joseph Cavender, Level 3 Communications; Speakers:
  Jon Nistor, TorIX;

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• Proactive Network Configuration Validation with Batfish
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• Proactive Network Configuration Validation with Batfish
  Speakers:
  Todd MillsteinUniversity of California, Los Angeles; .
  ratul mahajanmicrosoft research; .
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• Proactive Network Configuration Validation with Batfish
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  Todd MillsteinUniversity of California, Los Angeles; .
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• Deploying IPv6 at Scale as an ISP
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• Closing Remarks
  Speakers:
  Betty Burke, NANOG Executive Director;