BGP Policy violations in the data-plane
|
|
|
- Gervase Gallagher
- 5 years ago
- Views:
Transcription
1 BGP Policy violations in the data-plane Pierre Francois, Institute IMDEA Networks Paolo Lucente, PMACCT
2 Agenda Two well-known facts about routing... leading to policy violations... watch your network!
3 Observation 1 Policy-constrained path selection in BGP... Flexible, per-prefix granularity A BGP-router s route processor will pick a path towards a given destination prefix by applying the following rules Weight Local-pref As Path Length IGP/Med...
4 Observation 1... dominated in the data-plane A FIB will pick a path towards a given destination address by applying the following rules Longest prefix match to get the prefix ( Best path towards that prefix was picked based on Weight Local-pref As Path Length IGP/Med...)
5 Observation 1I Common to provide a lot of routing flexibility Route propagation control offered by Sprint Have to be a customer of Sprint 65000:XXX : Do not advertise to ASXXX can be AOL, NTT, BT, Level3, GBLX, Verizon, AT&T,...
6 Powerful complementary means to limit path knowledge Selective advertisement, performed locally Selective advertisement, triggered remotely
7 Control-plane/Data-plane can mismatch Paths for overlapping prefixes are controlled independently By yourself By your BGP neighborhood Forwarding plane dominated by the longest prefix match rule What if your policy differs for overlapping prefixes?
8 Toy case study A BGP advertisement for NLRI P/p A BGP advertisement of a prefix more specific than P/p, say P/p+1
9 The BGP policy violation trick Play with and communities Make reach only a subset of the ASes Some ASes forward according to Until packet reaches an AS knowing Resulting data-plane not necessarily fitting everyone s policy...
10 Initial routing status
11 Initial routing status
12 Initial routing status
13 Inbound TE, selective advertisement of a more specific prefix
14 Inbound TE, selective advertisement of a more specific prefix
15 Inbound TE, selective advertisement of a more specific prefix
16 Inbound TE, selective advertisement of a more specific prefix
17 Inbound TE, selective advertisement of a more specific prefix
18 Inbound TE, selective advertisement of a more specific prefix
19 Inbound TE, selective advertisement of a more specific prefix
20 Inbound TE, selective advertisement of a more specific prefix
21 Scope the advertisement of the more specific
22 Scope the advertisement of the more specific
23 Scope the advertisement of the more specific Only to ISP A!
24 Scope the advertisement of the more specific Only to ISP A!
25 Scope the advertisement of the more specific Only to ISP A!
26 Scope the advertisement of the more specific Only to ISP A!
27 Let s start playing : Scope advertisement of the more specific does not propagate BGP paths for to its providers and peers It still does for is likely to be installed in the FIB! Only to!
28 New path in the network Only to ISP A!
29 This is annoying Your policies can be violated Your flexible routing service can turn you into a transit thief when misused by your customers Nothing breaks when the violation takes place Ex. : Just consider the Tier-I clique...
30 So what can you do? Forward differently Filter-out / Drop Monitor!
31 Forwarding differently Deploy BGP so as to have forwarding at an incoming interface solely based on policy fitting paths Put the Internet in VRFs Careful configuration of import rules Complex, Costly
32 Filtering out / Drop Drop packets, at ingress, for routes that are not supposed to be served there Assume malicious behavior by default Interrupts service from/to customers Filter out, at egress Range served as if the msp did not exist
33 Monitor You got the means to monitor ingress-egress traffic demand to run your business, right? Just check if counters for non-policy compliant transit Pick the phone when counters are not at 0 Filter-out if the issue is not getting fixed early enough Seems like few operators run the check
34 PMACCT Tool developed by Paolo Lucente (See talk at RIPE 61 plenary) Policy violation check is a matter of a couple of lines Tools integrating with pmacct can benefit from this work (ie. Cariden)
35 Thanks!
Ongoing stories in Inter-domain routing. (Some of them)
Ongoing stories in Inter-domain routing (Some of them) Pierre.Francois@imdea.org Recommendation for a smooth afternoon Talks given to ISPs, router vendors, and one CDN No rocket science maybe not in your
BGP Path visibility issues.
BGP Path visibility issues Pierre.Francois@UCLouvain.be ToC ibgp draft-ietf-idr-add-aths Why doing Add-aths draft-ietf-idr-add-aths-guidelines (draft-uttaro-idr-add-aths-guidelines) Why only a small subset
Lecture 4: Intradomain Routing. CS 598: Advanced Internetworking Matthew Caesar February 1, 2011
Lecture 4: Intradomain Routing CS 598: Advanced Internetworking Matthew Caesar February 1, 011 1 Robert. How can routers find paths? Robert s local DNS server 10.1.8.7 A 10.1.0.0/16 10.1.0.1 Routing Table
internet technologies and standards
Institute of Telecommunications Warsaw University of Technology internet technologies and standards Piotr Gajowniczek BGP (Border Gateway Protocol) structure of the Internet Tier 1 ISP Tier 1 ISP Google
Routing Basics ISP/IXP Workshops
Routing Basics ISP/IXP Workshops 1 Routing Concepts IPv4 Routing Forwarding Some definitions Policy options Routing Protocols 2 IPv4 Internet uses IPv4 addresses are 32 bits long range from 1.0.0.0 to
Routing Concepts. IPv4 Routing Forwarding Some definitions Policy options Routing Protocols
Routing Basics 1 Routing Concepts IPv4 Routing Forwarding Some definitions Policy options Routing Protocols 2 IPv4 Internet uses IPv4 Addresses are 32 bits long Range from 1.0.0.0 to 223.255.255.255 0.0.0.0
Routing Basics. Routing Concepts. IPv4. IPv4 address format. A day in a life of a router. What does a router do? IPv4 Routing
Routing Concepts IPv4 Routing Routing Basics ISP/IXP Workshops Forwarding Some definitions Policy options Routing Protocols 1 2 IPv4 IPv4 address format Internet uses IPv4 addresses are 32 bits long range
Shim6: Network Operator Concerns. Jason Schiller Senior Internet Network Engineer IP Core Infrastructure Engineering UUNET / MCI
Shim6: Network Operator Concerns Jason Schiller Senior Internet Network Engineer IP Core Infrastructure Engineering UUNET / MCI Not Currently Supporting IPv6? Many parties are going forward with IPv6 Japan
Achieving Sub-50 Milliseconds Recovery Upon BGP Peering Link Failures
1 Achieving Sub-50 Milliseconds Recovery Upon BGP Peering Link Failures Olivier Bonaventure, Clarence Filsfils and Pierre Francois Abstract Recent measurements show that BGP peering links can fail as frequently
Vendor: Alcatel-Lucent. Exam Code: 4A Exam Name: Alcatel-Lucent Border Gateway Protocol. Version: Demo
Vendor: Alcatel-Lucent Exam Code: 4A0-102 Exam Name: Alcatel-Lucent Border Gateway Protocol Version: Demo QUESTION 1 Upon the successful establishment of a TCP session between peers, what type of BGP message
Internet Measurements. Motivation
Internet Measurements Arvind Krishnamurthy Fall 2004 Motivation Types of measurements Understand the topology of the Internet Measure performance characteristics Tools: BGP Tables Traceroute measurements
Multihoming Complex Cases & Caveats
Multihoming Complex Cases & Caveats ISP Workshops Last updated 6 October 2011 Complex Cases & Caveats p Complex Cases n Multiple Transits n Multi-exit backbone n Disconnected Backbone n IDC Multihoming
PART III. Implementing Inter-Network Relationships with BGP
PART III Implementing Inter-Network Relationships with BGP ICNP 2002 Routing Protocols Autonomous System BGP-4 BGP = Border Gateway Protocol Is a Policy-Based routing protocol Is the de facto EGP of today
Lecture 13: Traffic Engineering
Lecture 13: Traffic Engineering CSE 222A: Computer Communication Networks Alex C. Snoeren Thanks: Mike Freedman, Nick Feamster Lecture 13 Overview Evolution of routing in the ARPAnet Today s TE: Adjusting
BGP. Autonomous system (AS) BGP version 4
BGP Border Gateway Protocol (an introduction) dr. C. P. J. Koymans Informatics Institute University of Amsterdam March 11, 2008 General ideas behind BGP Background Providers, Customers and Peers External
A configuration-only approach to shrinking FIBs. Prof Paul Francis (Cornell)
A configuration-only approach to shrinking FIBs Prof Paul Francis (Cornell) 1 Virtual Aggregation An approach to shrinking FIBs (and RIBs) In routers, not in route reflectors Works with legacy routers
Inter-Domain Routing: BGP II
Inter-Domain Routing: BGP II Mark Handley UCL Computer Science CS 3035/GZ01 BGP Protocol (cont d) BGP doesn t chiefly aim to compute shortest paths (or minimize other metric, as do DV, LS) Chief purpose
Routing Basics. ISP Workshops. Last updated 10 th December 2015
Routing Basics ISP Workshops Last updated 10 th December 2015 1 Routing Concepts p IPv4 & IPv6 p Routing p Forwarding p Some definitions p Policy options p Routing Protocols 2 IPv4 p Internet still uses
IP Fast Reroute Applicability. Pierre Francois Institute IMDEA Networks
IP Fast Reroute Applicability Pierre Francois Institute IMDEA Networks Pierre.Francois@imdea.org Agenda IGP (Fast) Convergence IGP Fast Reroute (Hitless maintenance operations) IGP Fast convergence Pushing
BGP. Autonomous system (AS) BGP version 4. Definition (AS Autonomous System)
BGP Border Gateway Protocol (an introduction) Karst Koymans Informatics Institute University of Amsterdam (version 1.9, 2012/03/14 10:21:22) Monday, March 12, 2012 General ideas behind BGP Background Providers,
Back to basics J. Addressing is the key! Application (HTTP, DNS, FTP) Application (HTTP, DNS, FTP) Transport. Transport (TCP/UDP) Internet (IPv4/IPv6)
Routing Basics Back to basics J Application Presentation Application (HTTP, DNS, FTP) Data Application (HTTP, DNS, FTP) Session Transport Transport (TCP/UDP) E2E connectivity (app-to-app) Port numbers
BGP. Autonomous system (AS) BGP version 4
BGP Border Gateway Protocol (an introduction) dr. C. P. J. Koymans Informatics Institute University of Amsterdam (version 1.3, 2010/03/10 20:05:02) Monday, March 8, 2010 General ideas behind BGP Background
Routing Basics ISP/IXP Workshops
Routing Basics ISP/IXP Workshops 1 Routing Concepts IPv4 Routing Forwarding Some definitions Policy options Routing Protocols 2 IPv4 Internet uses IPv4 addresses are 32 bits long range from 1.0.0.0 to
Lecture 18: Border Gateway Protocol
Lecture 18: Border Gateway Protocol CSE 123: Computer Networks Alex C. Snoeren HW 3 due Wednesday Some figures courtesy Mike Freedman & Craig Labovitz Lecture 18 Overview Path-vector Routing Allows scalable,
IPv4/IPv6 BGP Routing Workshop. Organized by:
IPv4/IPv6 BGP Routing Workshop Organized by: Agenda Multihoming & BGP path control APNIC multihoming resource policy 2 ISP Hierarchy Default free zone Made of Tier-1 ISPs who have explicit routes to every
BGP. Autonomous system (AS) BGP version 4
BGP Border Gateway Protocol (an introduction) Karst Koymans Informatics Institute University of Amsterdam (version 1.5, 2011/03/06 13:35:28) Monday, March 7, 2011 General ideas behind BGP Background Providers,
Lecture 17: Border Gateway Protocol
Lecture 17: Border Gateway Protocol CSE 123: Computer Networks Alex C. Snoeren Some figures courtesy Mike Freedman Lecture 18 Overview Border Gateway Protocol (BGP) The canonical path vector protocol How
State of routing research
State of routing research Olivier Bonaventure with Pierre François, Bruno Quoitin and Steve Uhlig Dept. Computing Science and Engineering Université catholique de Louvain (UCL) http://www.info.ucl.ac.be/people/obo
BGP. Autonomous system (AS) BGP version 4. Definition (AS Autonomous System)
BGP Border Gateway Protocol (an introduction) Karst Koymans Informatics Institute University of Amsterdam (version 310, 2014/03/11 10:50:06) Monday, March 10, 2014 General ideas behind BGP Background Providers,
Internet Protocols Fall Lectures Inter-domain routing, mobility support, multicast routing Andreas Terzis
Internet Protocols Fall 2006 Lectures 11-12 Inter-domain routing, mobility support, multicast routing Andreas Terzis Outline Inter-domain Internet Routing BGP Routing for mobile nodes Multicast routing
Internet Routing Basics
Internet Routing Basics Back to basics J Application Presentation Application (HTTP, DNS, FTP) Data Application (HTTP, DNS, FTP) Session Transport Transport (TCP/UDP) E2E connectivity (app-to-app) Port
CS 640: Introduction to Computer Networks. Intra-domain routing. Inter-domain Routing: Hierarchy. Aditya Akella
CS 640: Introduction to Computer Networks Aditya Akella Lecture 11 - Inter-Domain Routing - BGP (Border Gateway Protocol) Intra-domain routing The Story So Far Routing protocols generate the forwarding
Service Provider Multihoming
Service Provider Multihoming ISP Workshops These materials are licensed under the Creative Commons Attribution-NonCommercial 4.0 International license (http://creativecommons.org/licenses/by-nc/4.0/) Last
Border Gateway Protocol (an introduction) Karst Koymans. Monday, March 10, 2014
.. BGP Border Gateway Protocol (an introduction) Karst Koymans Informatics Institute University of Amsterdam (version 3.10, 2014/03/11 10:50:06) Monday, March 10, 2014 Karst Koymans (UvA) BGP Monday, March
Service Provider Multihoming
BGP Traffic Engineering Previous examples dealt with loadsharing inbound traffic Of primary concern at Internet edge What about outbound traffic? Transit ISPs strive to balance traffic flows in both directions
Routing Basics. ISP Workshops
Routing Basics ISP Workshops These materials are licensed under the Creative Commons Attribution-NonCommercial 4.0 International license (http://creativecommons.org/licenses/by-nc/4.0/) Last updated 26
BGP Peering Engineering Automation challenges and enablers Cloud & Virtualization Group
BGP Peering Engineering Automation challenges and enablers Cloud & Virtualization Group Camilo Cardona (camcardo@cisco.com), Paolo Lucente (plucente@cisco.com) November 2015 v5.1 Introduction Inter-domain
Routing Basics. Campus Network Design & Operations Workshop
Routing Basics Campus Network Design & Operations Workshop These materials are licensed under the Creative Commons Attribution-NonCommercial 4.0 International license (http://creativecommons.org/licenses/by-nc/4.0/)
Inter-Domain Routing: BGP II
Inter-Domain Routing: BGP II Brad Karp UCL Computer Science (drawn mostly from lecture notes by Hari Balakrishnan and Nick Feamster, MIT) CS 05/GZ01 4 th December 2014 BGP Protocol (cont d) BGP doesn t
Introduc?on to pmacct
Introduc?on to pmacct Paolo Lucente pmacct GRNOG Workshop #1, Athens May 2017 whoami Paolo Lucente GitHub: paololucente LinkedIn: plucente Digging data out of networks worldwide for fun and profit for
Interdomain Routing Reading: Sections P&D 4.3.{3,4}
Interdomain Routing Reading: Sections P&D 4.3.{3,4} EE122: Intro to Communication Networks Fall 2006 (MW 4:00-5:30 in Donner 155) Vern Paxson TAs: Dilip Antony Joseph and Sukun Kim http://inst.eecs.berkeley.edu/~ee122/
Service Provider Multihoming
Service Provider Multihoming BGP Traffic Engineering 1 Service Provider Multihoming Previous examples dealt with loadsharing inbound traffic Of primary concern at Internet edge What about outbound traffic?
Border Gateway Protocol - BGP
BGP Fundamentals Border Gateway Protocol - BGP Runs over TCP (port 179) TCP connection required before BGP session Need to be reachable! Path vector routing protocol Best path selection based on path attributes
Link State Routing & Inter-Domain Routing
Link State Routing & Inter-Domain Routing CS640, 2015-02-26 Announcements Assignment #2 is due Tuesday Overview Link state routing Internet structure Border Gateway Protocol (BGP) Path vector routing Inter
Interdomain routing with BGP4 Part 4/5
Interdomain routing with BGP4 Part 4/5 Olivier Bonaventure Department of Computing Science and Engineering Université catholique de Louvain (UCL) Place Sainte-Barbe, 2, B-1348, Louvain-la-Neuve (Belgium)
Internet Routing Protocols Lecture 03 Inter-domain Routing
Internet Routing Protocols Lecture 03 Inter-domain Routing Advanced Systems Topics Lent Term, 2008 Timothy G. Griffin Computer Lab Cambridge UK Autonomous Routing Domains A collection of physical networks
Service Provider Multihoming
Service Provider Multihoming ISP Workshops Last updated 18 September 2013 1 Service Provider Multihoming p Previous examples dealt with loadsharing inbound traffic n Of primary concern at Internet edge
Lecture 17: Router Design
Lecture 17: Router Design CSE 123: Computer Networks Alex C. Snoeren HW 3 due WEDNESDAY Eample courtesy Mike Freedman Lecture 17 Overview BGP relationships Router internals Buffering Scheduling 2 Business
Advanced Multihoming. BGP Traffic Engineering
Advanced Multihoming BGP Traffic Engineering 1 Service Provider Multihoming Previous examples dealt with loadsharing inbound traffic Of primary concern at Internet edge What about outbound traffic? Transit
Interdomain routing CSCI 466: Networks Keith Vertanen Fall 2011
Interdomain routing CSCI 466: Networks Keith Vertanen Fall 2011 Overview Business relationships between ASes Interdomain routing using BGP Advertisements Routing policy Integration with intradomain routing
Multihoming Techniques. bdnog8 May 4 8, 2018 Jashore, Bangladesh.
Multihoming Techniques bdnog8 May 4 8, 2018 Jashore, Bangladesh. 2 ISP Hierarchy Default free zone Internet Routers that have explicit routes to every network on the Internet Regional /Access Providers
An overview of how packets are routed in the Internet
An overview of how packets are routed in the Internet 1 Dijkstra s shortest path first algorithm (example of a Link State Algorithm ) 1. Exchange link state: A router floods to every other router the state
EXAM - 4A Alcatel-Lucent Virtual Private Routed Networks. Buy Full Product.
Alcatel lucent EXAM - 4A0-106 Alcatel-Lucent Virtual Private Routed Networks Buy Full Product http://www.examskey.com/4a0-106.html Examskey Alcatel lucent 4A0-106 exam demo product is here for you to test
Active BGP Measurement with BGP-Mux. Ethan Katz-Bassett (USC) with testbed and some slides hijacked from Nick Feamster and Valas Valancius
Active BGP Measurement with BGP-Mux Ethan Katz-Bassett (USC) with testbed and some slides hijacked from Nick Feamster and Valas Valancius 2 Before I Start Georgia Tech system, I am just an enthusiastic
Programmatic Interface to Routing
Programmatic Interface to Routing NANOG 61 Draft version, slides will be updated before presentation Applications and Networks Routing system players: the Application and the Network. Different interdependent
How the Internet works? The Border Gateway Protocol (BGP)
Chair of Network Architectures and Services - Prof. Carle Department of Computer Science Technical University of Munich How the Internet works? The Border Gateway Protocol (BGP) Edwin Cordeiro ilab2 Lecture
Internet Engineering Task Force (IETF) Category: Standards Track ISSN: Y. Cai Alibaba Group T. Morin Orange June 2016
Internet Engineering Task Force (IETF) Request for Comments: 7900 Updates: 6513, 6514, 6625 Category: Standards Track ISSN: 2070-1721 Y. Rekhter, Ed. E. Rosen, Ed. Juniper Networks, Inc. R. Aggarwal Arktan
Using BGP Communities
Using BGP Communities ISP Workshops These materials are licensed under the Creative Commons Attribution-NonCommercial 4.0 International license (http://creativecommons.org/licenses/by-nc/4.0/) Last updated
Interdomain Routing Design for MobilityFirst
Interdomain Routing Design for MobilityFirst October 6, 2011 Z. Morley Mao, University of Michigan In collaboration with Mike Reiter s group 1 Interdomain routing design requirements Mobility support Network
Cisco. Maintaining Cisco Service Provider VPNs and MPLS Networks (MSPVM)
Cisco 642-780 Maintaining Cisco Service Provider VPNs and MPLS Networks (MSPVM) Download Full Version : http://killexams.com/pass4sure/exam-detail/642-780 QUESTION: 56 Which command should be used to verify
Interdomain Routing and Connectivity
Interdomain Routing and Connectivity Brighten Godfrey CS 538 February 28 2018 slides 2010-2018 by Brighten Godfrey unless otherwise noted Routing Choosing paths along which messages will travel from source
Configuring MPLS L3VPN
Contents Configuring MPLS L3VPN 1 MPLS L3VPN overview 1 Introduction to MPLS L3VPN 1 MPLS L3VPN concepts 2 MPLS L3VPN packet forwarding 5 MPLS L3VPN networking schemes 5 MPLS L3VPN routing information
Inter-AS routing. Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley
Inter-AS routing Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley Some materials copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved Chapter 4:
CS4450. Computer Networks: Architecture and Protocols. Lecture 15 BGP. Spring 2018 Rachit Agarwal
CS4450 Computer Networks: Architecture and Protocols Lecture 15 BGP Spring 2018 Rachit Agarwal Autonomous System (AS) or Domain Region of a network under a single administrative entity Border Routers Interior
Dynamics of Hot-Potato Routing in IP Networks
Dynamics of Hot-Potato Routing in IP Networks Jennifer Rexford AT&T Labs Research http://www.research.att.com/~jrex Joint work with Renata Teixeira (UCSD), Aman Shaikh (AT&T), and Timothy Griffin (Intel)
CS 43: Computer Networks Internet Routing. Kevin Webb Swarthmore College November 16, 2017
CS 43: Computer Networks Internet Routing Kevin Webb Swarthmore College November 16, 2017 1 Hierarchical routing Our routing study thus far - idealization all routers identical network flat not true in
MPLS L3VPN. The MPLS L3VPN model consists of three kinds of devices: PE CE Site 2. Figure 1 Network diagram for MPLS L3VPN model
is a kind of PE-based L3VPN technology for service provider VPN solutions. It uses BGP to advertise VPN routes and uses to forward VPN packets on service provider backbones. provides flexible networking
BGP and the Internet
BGP and the Internet Using Communities for Multihoming 1 Multihoming and Communities The BGP community attribute is a very powerful tool for assisting and scaling BGP Multihoming 2 Loadsharing Using Communities
BGP Routing inside an AS
Hot Potatoes Heat Up BGP Routing Renata Teixeira (UC San Diego) http://www-cse.ucsd.edu/~teixeira with Aman Shaikh (AT&T), Tim Griffin(Intel), and Jennifer Rexford(AT&T) 30 th NANOG Miami, Florida BGP
Interdomain Routing Reading: Sections K&R EE122: Intro to Communication Networks Fall 2007 (WF 4:00-5:30 in Cory 277)
Interdomain Routing Reading: Sections K&R 4.6.3 EE122: Intro to Communication Networks Fall 2007 (WF 4:00-5:30 in Cory 277) Guest Lecture by Brighten Godfrey Instructor: Vern Paxson TAs: Lisa Fowler, Daniel
Using BGP Communities
Using BGP Communities ISP Workshops Last updated 22 nd April 2016 1 Multihoming and Communities p The BGP community attribute is a very powerful tool for assisting and scaling BGP Policies and BGP Multihoming
Studying Black Holes on the Internet with Hubble
Studying Black Holes on the Internet with Hubble Ethan Katz-Bassett, Harsha V. Madhyastha, John P. John, Arvind Krishnamurthy, David Wetherall, Thomas Anderson University of Washington RIPE, May 2008 This
Tag Switching. Background. Tag-Switching Architecture. Forwarding Component CHAPTER
CHAPTER 23 Tag Switching Background Rapid changes in the type (and quantity) of traffic handled by the Internet and the explosion in the number of Internet users is putting an unprecedented strain on the
Small additions by Dr. Enis Karaarslan, Purdue - Aaron Jarvis (Network Engineer)
Routing Basics 1 Small additions by Dr. Enis Karaarslan, 2014 Purdue - Aaron Jarvis (Network Engineer) Routing Concepts IPv4 Routing Forwarding Some definitions Policy options Routing Protocols 3 IPv4
Achieving Sub-50 Milliseconds Recovery Upon BGP Peering Link Failures
Achieving Sub-50 Milliseconds Recovery Upon BGP Peering Link Failures Olivier Bonaventure Dept CSE Université catholique de Louvain (UCL) Belgium bonaventure@info.ucl.ac.be Clarence Filsfils Cisco Systems
Hot Potatoes Heat Up BGP Routing
Hot Potatoes Heat Up BGP Routing Renata Teixeira Laboratoire d Informatique de Paris 6 Université Pierre et Marie Curie Amsterdam Internet Routing Architecture Verio AT&T AOL Web Server UCSD Sprint User
Carnegie Mellon Computer Science Department Spring 2016 Midterm Exam
Carnegie Mellon Computer Science Department. 15-744 Spring 2016 Midterm Exam Name: Andrew ID: INSTRUCTIONS: There are 13 pages (numbered at the bottom). Make sure you have all of them. Please write your
Lecture 17: Router Design
Lecture 17: Router Design CSE 123: Computer Networks Alex C. Snoeren Eample courtesy Mike Freedman Lecture 17 Overview Finish up BGP relationships Router internals Buffering Scheduling 2 Peer-to-Peer Relationship
Lecture 16: Interdomain Routing. CSE 123: Computer Networks Stefan Savage
Lecture 16: Interdomain Routing CSE 123: Computer Networks Stefan Savage Overview Autonomous Systems Each network on the Internet has its own goals Path-vector Routing Allows scalable, informed route selection
Routing Basics. SANOG July, 2017 Gurgaon, INDIA
Routing Basics SANOG 30 14-18 July, 2017 Gurgaon, INDIA Back to basics J Application Presentation Application (HTTP, DNS, FTP) Data Application (HTTP, DNS, FTP) Session Transport Transport (TCP/UDP) E2E
BGP Routing and BGP Policy. BGP Routing. Agenda. BGP Routing Information Base. L47 - BGP Routing. L47 - BGP Routing
BGP Routing and BGP Policy BGP Routing The BGP Routing Principles and Route Decisions based on AS-Path in a simple topology of AS s routing policy is reduced to a minimal function demonstrated in example
Internet Engineering Task Force (IETF) Request for Comments: 7024 Category: Standards Track
Internet Engineering Task Force (IETF) Request for Comments: 7024 Category: Standards Track ISSN: 2070-1721 H. Jeng J. Uttaro AT&T L. Jalil Verizon B. Decraene Orange Y. Rekhter Juniper Networks R. Aggarwal
Evaluating the Benefits of the Locator/Identifier Separation
Evaluating the Benefits of the Locator/Identifier Separation Bruno Quoitin IP Networking Lab Computer Science and Engineering Dept. Université catholique de Louvain, Belgium (bruno.quoitin@uclouvain.be)
E : Internet Routing
E6998-02: Internet Routing Lecture 16 Border Gateway Protocol, Part V John Ioannidis AT&T Labs Research ji+ir@cs.columbia.edu Copyright 2002 by John Ioannidis. All Rights Reserved. Announcements Lectures
Inter-domain Routing. Outline. Border Gateway Protocol
Inter-domain Routing Outline Border Gateway Protocol Internet Structure Original idea CS 640 2 Internet Structure Today CS 640 3 Route Propagation in the Internet Autonomous System (AS) corresponds to
Introduction to IP Routing. Geoff Huston
Introduction to IP Routing Geoff Huston Routing How do packets get from A to B in the Internet? A Internet B Connectionless Forwarding Each router (switch) makes a LOCAL decision to forward the packet
IP Addressing & Interdomain Routing. Next Topic
IP Addressing & Interdomain Routing Next Topic IP Addressing Hierarchy (prefixes, class A, B, C, subnets) Interdomain routing Application Presentation Session Transport Network Data Link Physical Scalability
Master Course Computer Networks IN2097
Chair for Network Architectures and Services Prof. Carle Department of Computer Science TU München Master Course Computer Networks IN2097 Prof. Dr.-Ing. Georg Carle Chair for Network Architectures and
Reducing FIB Size with Virtual Aggregation (VA)
Reducing FIB Size with Virtual Aggregation (VA) Paul Francis, MPI-SWS Xiaohu Xu, Huawei, Hitesh Ballani, Cornell Dan Jen, UCLA Robert Raszuk, Cisco Lixia Zhang, UCLA ISPs often want to extend the life
CS 43: Computer Networks. 24: Internet Routing November 19, 2018
CS 43: Computer Networks 24: Internet Routing November 19, 2018 Last Class Link State + Fast convergence (reacts to events quickly) + Small window of inconsistency Distance Vector + + Distributed (small
Routing on the Internet. Routing on the Internet. Hierarchical Routing. Computer Networks. Lecture 17: Inter-domain Routing and BGP
Routing on the Internet Computer Networks Lecture 17: Inter-domain Routing and BGP In the beginning there was the ARPANET: route using GGP (Gateway-to-Gateway Protocol), a distance vector routing protocol
pmacct and Streaming Telemetry
pmacct and Streaming Telemetry Paolo Lucente pmacct ITNOG 2, Bologna Nov 2016 whoami Paolo Lucente Github: paololucente Twitter: @Paolo_Lucente Digging data out of networks worldwide for fun and profit
Routing Security* CSE598K/CSE545 - Advanced Network Security Prof. McDaniel - Spring * Thanks to Steve Bellovin for slide source material.
Routing Security* CSE598K/CSE545 - Advanced Network Security Prof. McDaniel - Spring 2008 * Thanks to Steve Bellovin for slide source material. 1 Routing 101 Network routing exists to provide hosts desirable
Configuring MPLS L3VPN
Contents Configuring MPLS L3VPN 1 MPLS L3VPN overview 1 MPLS L3VPN concepts 2 MPLS L3VPN packet forwarding 4 MPLS L3VPN networking schemes 5 MPLS L3VPN routing information advertisement 8 Inter-AS VPN
Security in inter-domain routing
DD2491 p2 2011 Security in inter-domain routing Olof Hagsand KTH CSC 1 Literature Practical BGP pages Chapter 9 See reading instructions Beware of BGP Attacks (Nordström, Dovrolis) Examples of attacks
BGP made easy. John van Oppen Spectrum Networks / AS11404
1 BGP made easy John van Oppen Spectrum Networks / AS11404 2 What is BGP? Snarky answer: RFC-4271 BGP is an Exterior gateway protocol, the only one used on the public Internet and is used for inter-autonomous
CSCI-1680 Network Layer: Inter-domain Routing Rodrigo Fonseca
CSCI-1680 Network Layer: Inter-domain Routing Rodrigo Fonseca Based partly on lecture notes by Rob Sherwood, David Mazières, Phil Levis, John Janno? Administrivia Midterm moved up from 3/17 to 3/15 IP
CMSC 417. Computer Networks Prof. Ashok K Agrawala Ashok Agrawala October 9, 2018 (a) October 18 October 9,
CMSC 417 Computer Networks Prof. Ashok K Agrawala 2018 Ashok Agrawala October 9, 2018 (a) October 18 October 9, 2018 1 host Message, Segment, Packet, and Frame host HTTP HTTP message HTTP TCP TCP segment
TBGP: A more scalable and functional BGP. Paul Francis Jan. 2004
TBGP: A more scalable and functional BGP Paul Francis Jan. 2004 BGP: Border Gateway Protocol BGP is the top-level routing protocol in the Internet It holds the Internet together BGP allows routers to tell
Routing(2) Inter-domain Routing
Routing(2) Inter-domain Routing Information Network I Youki Kadobayashi 1 Outline! Distance vector routing! Link state routing! IGP and EGP Intra-domain routing protocol, inter-domain routing protocol!