Deploying Ipv6 – Internet Protocol Version 6 Practical Guidance
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"Mutually Controlled Routing with Independent Isps"
Mutually Controlled Routing with Independent ISPs Ratul Mahajan David Wetherall Thomas Anderson Microsoft Research University of Washington University of Washington and Intel Research Abstract – We present , an Internet routing pro- Our intent is to develop an interdomain routing proto- Wiser tocol that enables ISPs to jointly control routing in a way col that addresses these problems at a more basic level. that produces efficient end-to-end paths even when they We aim to allow all ISPs to exert control over all routes act in their own interests. is a simple extension to as large a degree as possible, while still selecting end- Wiser of BGP, uses only existing peering contracts for mone- to-end paths that are of high quality. This is a difficult tary exchange, and can be incrementally deployed. Each problem and there are very few examples of effective me- ISP selects paths in a way that presents a compromise diation in networks, despite competitive interests having between its own considerations and those of other ISPs. long been identified as an important factor [8]. Done over many routes, this allows each ISP to improve While it is not a priori obvious that it is possible to its situation by its own optimization criteria compared to succeed at this goal, our earlier work on Nexit [28] sug- the use of BGP today. We evaluate using a router- gests that efficient paths are, in fact, a feasible outcome of Wiser level prototype and simulation on measured ISP topolo- routing across independent ISPs in realistic network set- gies. We find that, unlike Internet routing today, tings. -
Is QUIC a Better Choice Than TCP in the 5G Core Network Service Based Architecture?
DEGREE PROJECT IN INFORMATION AND COMMUNICATION TECHNOLOGY, SECOND CYCLE, 30 CREDITS STOCKHOLM, SWEDEN 2020 Is QUIC a Better Choice than TCP in the 5G Core Network Service Based Architecture? PETHRUS GÄRDBORN KTH ROYAL INSTITUTE OF TECHNOLOGY SCHOOL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE Is QUIC a Better Choice than TCP in the 5G Core Network Service Based Architecture? PETHRUS GÄRDBORN Master in Communication Systems Date: November 22, 2020 Supervisor at KTH: Marco Chiesa Supervisor at Ericsson: Zaheduzzaman Sarker Examiner: Peter Sjödin School of Electrical Engineering and Computer Science Host company: Ericsson AB Swedish title: Är QUIC ett bättre val än TCP i 5G Core Network Service Based Architecture? iii Abstract The development of the 5G Cellular Network required a new 5G Core Network and has put higher requirements on its protocol stack. For decades, TCP has been the transport protocol of choice on the Internet. In recent years, major Internet players such as Google, Facebook and CloudFlare have opted to use the new QUIC transport protocol. The design assumptions of the Internet (best-effort delivery) differs from those of the Core Network. The aim of this study is to investigate whether QUIC’s benefits on the Internet will translate to the 5G Core Network Service Based Architecture. A testbed was set up to emulate traffic patterns between Network Functions. The results show that QUIC reduces average request latency to half of that of TCP, for a majority of cases, and doubles the throughput even under optimal network conditions with no packet loss and low (20 ms) RTT. Additionally, by measuring request start and end times “on the wire”, without taking into account QUIC’s shorter connection establishment, we believe the results indicate QUIC’s suitability also under the long-lived (standing) connection model. -
Internet Protocol Suite
InternetInternet ProtocolProtocol SuiteSuite Srinidhi Varadarajan InternetInternet ProtocolProtocol Suite:Suite: TransportTransport • TCP: Transmission Control Protocol • Byte stream transfer • Reliable, connection-oriented service • Point-to-point (one-to-one) service only • UDP: User Datagram Protocol • Unreliable (“best effort”) datagram service • Point-to-point, multicast (one-to-many), and • broadcast (one-to-all) InternetInternet ProtocolProtocol Suite:Suite: NetworkNetwork z IP: Internet Protocol – Unreliable service – Performs routing – Supported by routing protocols, • e.g. RIP, IS-IS, • OSPF, IGP, and BGP z ICMP: Internet Control Message Protocol – Used by IP (primarily) to exchange error and control messages with other nodes z IGMP: Internet Group Management Protocol – Used for controlling multicast (one-to-many transmission) for UDP datagrams InternetInternet ProtocolProtocol Suite:Suite: DataData LinkLink z ARP: Address Resolution Protocol – Translates from an IP (network) address to a network interface (hardware) address, e.g. IP address-to-Ethernet address or IP address-to- FDDI address z RARP: Reverse Address Resolution Protocol – Translates from a network interface (hardware) address to an IP (network) address AddressAddress ResolutionResolution ProtocolProtocol (ARP)(ARP) ARP Query What is the Ethernet Address of 130.245.20.2 Ethernet ARP Response IP Source 0A:03:23:65:09:FB IP Destination IP: 130.245.20.1 IP: 130.245.20.2 Ethernet: 0A:03:21:60:09:FA Ethernet: 0A:03:23:65:09:FB z Maps IP addresses to Ethernet Addresses -
The Internet Protocol, Version 4 (Ipv4)
Today’s Lecture I. IPv4 Overview The Internet Protocol, II. IP Fragmentation and Reassembly Version 4 (IPv4) III. IP and Routing IV. IPv4 Options Internet Protocols CSC / ECE 573 Fall, 2005 N.C. State University copyright 2005 Douglas S. Reeves 1 copyright 2005 Douglas S. Reeves 2 Internet Protocol v4 (RFC791) Functions • A universal intermediate layer • Routing IPv4 Overview • Fragmentation and reassembly copyright 2005 Douglas S. Reeves 3 copyright 2005 Douglas S. Reeves 4 “IP over Everything, Everything Over IP” IP = Basic Delivery Service • Everything over IP • IP over everything • Connectionless delivery simplifies router design – TCP, UDP – Dialup and operation – Appletalk – ISDN – Netbios • Unreliable, best-effort delivery. Packets may be… – SCSI – X.25 – ATM – Ethernet – lost (discarded) – X.25 – Wi-Fi – duplicated – SNA – FDDI – reordered – Sonet – ATM – Fibre Channel – Sonet – and/or corrupted – Frame Relay… – … – Remote Direct Memory Access – Ethernet • Even IP over IP! copyright 2005 Douglas S. Reeves 5 copyright 2005 Douglas S. Reeves 6 1 IPv4 Datagram Format IPv4 Header Contents 0 4 8 16 31 •Version (4 bits) header type of service • Functions version total length (in bytes) length (x4) prec | D T R C 0 •Header Length x4 (4) flags identification fragment offset (x8) 1. universal 0 DF MF s •Type of Service (8) e time-to-live (next) protocol t intermediate layer header checksum y b (hop count) identifier •Total Length (16) 0 2 2. routing source IP address •Identification (16) 3. fragmentation and destination IP address reassembly •Flags (3) s •Fragment Offset ×8 (13) e t 4. Options y IP options (if any) b •Time-to-Live (8) 0 4 ≤ •Protocol Identifier (8) s e t •Header Checksum (16) y b payload 5 •Source IP Address (32) 1 5 5 6 •Destination IP Address (32) ≤ •IP Options (≤ 320) copyright 2005 Douglas S. -
Openflow: Enabling Innovation in Campus Networks
OpenFlow: Enabling Innovation in Campus Networks Nick McKeown Tom Anderson Hari Balakrishnan Stanford University University of Washington MIT Guru Parulkar Larry Peterson Jennifer Rexford Stanford University Princeton University Princeton University Scott Shenker Jonathan Turner University of California, Washington University in Berkeley St. Louis This article is an editorial note submitted to CCR. It has NOT been peer reviewed. Authors take full responsibility for this article’s technical content. Comments can be posted through CCR Online. ABSTRACT to experiment with production traffic, which have created an This whitepaper proposes OpenFlow: a way for researchers exceedingly high barrier to entry for new ideas. Today, there to run experimental protocols in the networks they use ev- is almost no practical way to experiment with new network ery day. OpenFlow is based on an Ethernet switch, with protocols (e.g., new routing protocols, or alternatives to IP) an internal flow-table, and a standardized interface to add in sufficiently realistic settings (e.g., at scale carrying real and remove flow entries. Our goal is to encourage network- traffic) to gain the confidence needed for their widespread ing vendors to add OpenFlow to their switch products for deployment. The result is that most new ideas from the net- deployment in college campus backbones and wiring closets. working research community go untried and untested; hence We believe that OpenFlow is a pragmatic compromise: on the commonly held belief that the network infrastructure has one hand, it allows researchers to run experiments on hetero- “ossified”. geneous switches in a uniform way at line-rate and with high Having recognized the problem, the networking commu- port-density; while on the other hand, vendors do not need nity is hard at work developing programmable networks, to expose the internal workings of their switches. -
61A Lecture 35 Distributed Computing Internet Protocol Transmission
Announcements • Homework 9 (6 pts) due Wednesday 11/26 @ 11:59pm ! Homework Party Monday 6pm-8pm in 2050 VLSB • Guest in live lecture, TA Soumya Basu, on Monday 11/24 • Optional Scheme recursive art contest due Monday 12/1 @ 11:59pm 61A Lecture 35 • No lecture on Wednesday 11/26 (turkey) • No lab on Tuesday 11/25 & Wednesday 11/26 • The week of 12/1: Homework 10 due Wednesday 12/3 & Quiz 3 due Thursday 12/4 on SQL Monday, November 24 ! The lab on SQL (12/2 & 12/3) will be an excellent place to get homework help 2 Distributed Computing A distributed computing application consists of multiple programs running on multiple computers that together coordinate to perform some task. • Computation is performed in parallel by many computers. • Information can be restricted to certain computers. • Redundancy and geographic diversity improve reliability. Distributed Computing Characteristics of distributed computing: • Computers are independent — they do not share memory. • Coordination is enabled by messages passed across a network. • Individual programs have differentiating roles. Distributed computing for large-scale data processing: • Databases respond to queries over a network. • Data sets can be partitioned across multiple machines (next lecture). 4 Network Messages Computers communicate via messages: sequences of bytes transmitted over a network. Messages can serve many purposes: • Send data to another computer • Request data from another computer • Instruct a program to call a function on some arguments. Internet Protocol • Transfer a program to be executed by another computer. Messages conform to a message protocol adopted by both the sender (to encode the message) & receiver (to interpret the message). -
Lesson-13: INTERNET ENABLED SYSTEMS NETWORK PROTOCOLS
DEVICES AND COMMUNICATION BUSES FOR DEVICES NETWORK– Lesson-13: INTERNET ENABLED SYSTEMS NETWORK PROTOCOLS Chapter-5 L13: "Embedded Systems - Architecture, Programming and Design", 2015 1 Raj Kamal, Publs.: McGraw-Hill Education Internet enabled embedded system Communication to other system on the Internet. Use html (hyper text markup language) or MIME (Multipurpose Internet Mail Extension) type files Use TCP (transport control protocol) or UDP (user datagram protocol) as transport layer protocol Chapter-5 L13: "Embedded Systems - Architecture, Programming and Design", 2015 2 Raj Kamal, Publs.: McGraw-Hill Education Internet enabled embedded system Addressed by an IP address Use IP (internet protocol) at network layer protocol Chapter-5 L13: "Embedded Systems - Architecture, Programming and Design", 2015 3 Raj Kamal, Publs.: McGraw-Hill Education MIME Format to enable attachment of multiple types of files txt (text file) doc (MSOFFICE Word document file) gif (graphic image format file) jpg (jpg format image file) wav format voice or music file Chapter-5 L13: "Embedded Systems - Architecture, Programming and Design", 2015 4 Raj Kamal, Publs.: McGraw-Hill Education A system at one IP address Communication with other system at another IP address using the physical connections on the Internet and routers Since Internet is global network, the system connects to remotely as well as short range located system. Chapter-5 L13: "Embedded Systems - Architecture, Programming and Design", 2015 5 Raj Kamal, Publs.: McGraw-Hill Education -
DOD Memorandum: Department of Defense Implementation of Internet
DEPUTY SECRETARY OF DEFENSE 1010 DEFENSE PENTAGON WASHINGTON DC 20301-1010 June 29, 2021 MEMORANDUM FOR SENIOR PENTAGON LEADERSHIP DEFENSE AGENCY AND DOD FIELD ACTIVITY DIRECTORS SUBJECT: Directive-type Memorandum 21-004 – “Department of Defense Implementation of Internet Protocol Version 6” References: See Attachment 1 Purpose. Pursuant to the Federal requirements in Office of Management and Budget (OMB) Memorandum M-21-07, this directive-type memorandum (DTM): • Establishes policy, assigns responsibilities, and prescribes procedures for deploying and using Internet Protocol version 6 (IPv6) in DoD information systems. • Is effective June 29, 2021; it will be converted to a new DoD instruction. This DTM will expire effective 12 months from the date issuance is published on the DoD Issuances Website, June 29, 2022. Applicability. This DTM: • Applies to OSD, the Military Departments (including the Coast Guard at all times, including when it is a Service in the Department of Homeland Security by agreement with that Department), the Office of the Chairman of the Joint Chiefs of Staff and the Joint Staff, the Combatant Commands, the Office of Inspector General of the Department of Defense, the Defense Agencies, the DoD Field Activities, and all other organizational entities within DoD (referred to collectively in this issuance as the “DoD Components”). • Does not apply to National Security Systems, as defined by Committee on National Security Systems Instruction 4009. Definitions. See Glossary. Policy. Pursuant to OMB Memorandum M-21-07, all new networked DoD information systems that use internet protocol (IP) technologies will be IPv6-enabled before implementation and operational use by the end of fiscal year (FY) 2023. -
Virtually Eliminating Router Bugs
Virtually Eliminating Router Bugs Eric Keller∗ Minlan Yu∗ Matthew Caesar† Jennifer Rexford∗ ∗ Princeton University, Princeton, NJ, USA † UIUC, Urbana, IL, USA [email protected] {minlanyu, jrex}@cs.princeton.edu [email protected] ABSTRACT 1. INTRODUCTION Software bugs in routers lead to network outages, security The Internet is an extremely large and complicated dis- vulnerabilities, and other unexpected behavior. Rather than tributed system. Selecting routes involves computations across simply crashing the router, bugs can violate protocol se- millions of routers spread over vast distances, multiple rout- mantics, rendering traditional failure detection and recovery ing protocols, and highly customizable routing policies. Most techniques ineffective. Handling router bugs is an increas- of the complexity in Internet routing exists in protocols im- ingly important problem as new applications demand higher plemented as software running on routers. These routers availability, and networks become better at dealing with tra- typically run an operating system, and a collection of proto- ditional failures. In this paper, we tailor software and data col daemons which implement the various tasks associated diversity (SDD) to the unique properties of routing proto- with protocol operation. Like any complex software, routing cols, so as to avoid buggy behavior at run time. Our bug- software is prone to implementation errors, or bugs. tolerant router executes multiple diverse instances of routing software, and uses voting to determine the output to publish 1.1 Challenges in dealing with router bugs to the forwarding table, or to advertise to neighbors. We de- sign and implement a router hypervisor that makes this par- The fact that bugs can produce incorrect and unpredictable allelism transparent to other routers, handles fault detection behavior, coupled with the mission-critical nature of Inter- and booting of new router instances, and performs voting in net routers, can produce disastrous results. -
IEEE Workshop on Open-Source Software Networking (OSSN) CALL for PAPERS
IEEE Workshop on Open-Source Software Networking (OSSN) CALL FOR PAPERS SEOUL, KOREA – June 6 2016 http://opennetworking.kr/ossn The IEEE International Workshop on Open-Source Software Networking (OSSN 2016) will be held on June 6, 2016 in Seoul Korea along with the 2nd IEEE International Conference on Network Softwarization (NetSoft 2016, sites.ieee.org/netsoft). The OSSN workshop aims to provide a venue for sharing experiences on developing and operating open-source software-centric networking tools and platforms. It intends to cover various aspects for open-source collaboration community of professionals from academia and industry. Full and short (work-in-process) papers are solicited to discuss experiences on development, deployment, operation, and experimental studies around the overall lifecycle of open-source software networking. Topics of Interest Authors are invited to submit papers that fall into any topics related with open-source software networking. Topics of interest include, but are not limited to, the following: • SDN (Software Defined Networking): ONOS, Open Daylight, Ryu, … • NFV (Network Function Virtualization): OPNFV, OpenMano, … • Switching: Open vSwitch, Open Switch, Open Network Linux, Indigo, … • Routing: Click, Zebra, Quagga, XORP, VyOS, Project Calico, … • Wireless: OpenLTE, OpenAirInterface, … • Cloud and Analytics: OpenStack Neutron, Docker networking, Hadoop, Spark, … • Monitoring and Messaging: Catti, Nagios, Zabbix, Zenoss, Ntop, Kafka, RabbitMQ, … • Security and Utilities: Snort, OpenVPN, Netfilter, IPtables, Wireshark, NIST Net, … • Development and Simulation: NetFPGA, GNU radio, ns-3, … Paper Submission Authors are invited to submit only original papers (written in English) not published or submitted for publication elsewhere. Full papers can be up to 6 pages while short (work-in-progress) papers are up to 4 pages. -
The Dawn of Open-Source Routing
VYATTA, INC. | Release Notes Vyatta Release 2.0 February 2007 Document Part No. A0-0081-10-02 Vyatta Suite 160 One Waters Park Drive San Mateo, CA 94403 vyatta.com VYATTA, INC. | Release Notes Contents • New in This Release • Behavior Changes • Upgrade Notes • Resolved Issues • Known Issues New in This Release • IPsec VPN. This release introduces support for IPsec VPN. This IPsec VPN implementation allows small to large enterprises and enterprise branch offices to deploy a high-performance, robust, integrated routing and security solution for site-to-site secure communications. Vyatta’s implementation employs standard cryptographic and hash algorithms and is interoperable with other standards-based IPsec VPN products. • Bug fixes. A number of issues have been resolved with Release 2.0. A summary list of these is provided in the “Resolved Issues” section, which begins on page H2. Behavior Changes There are no behavior changes in this release. Upgrade Notes Release 1.1.2 can be upgraded to Release 2.0 using an ordinary package upgrade. Release 2.0 configuration files are not compatible with configuration files from Release 1.0.3 and earlier. Therefore, existing configurations from Release 1.0.x must be migrated to the new release. Users are strongly urged to consult the Release 2.0 upgrade procedure available in the Subscription Knowledge Base located on the Vyatta Customer Care Center web site (http://www2.vyatta.com/support) for instructions on how to most easily migrate existing Release 1.0.x configurations to Release 2.0. /..1 VYATTA, -
Open Source Software for Routing a Look at the Status of Open Source Software for Routing
APNIC 34 Open Source Software for Routing A look at the status of Open Source Software for Routing Martin Winter OpenSourceRouting.org 1 Who is OpenSourceRouting Quick Overview of what we do and who we are www.opensourcerouting.org ‣ Started late summer 2011 ‣ Focus on improving Quagga ‣ Funded by Companies who like an Open Source Alternative ‣ Non-Profit Organization • Part of ISC (Internet System Consortium) 2 Important reminder: Quagga/Bird/… are not complete routers. They are only the Route Engine. You still need a forwarding plane 3 Why look at Open Source for routing, Why now? Reasons for Open Source Software in Routing 1 Popular Open Source Software Overview of Bird, Quagga, OpenBGPd, Xorp 2 Current Status of Quagga Details on where to consider Quagga, where to avoid it 3 What Open Source Routing is doing What we (OpenSourceRouting.org) do on Quagga 4 How you can help Open Source needs your help. And it will help you. 5 4 Reasons why the time is NOW A few reasons to at least start thinking about Open Source Could be much cheaper. You don’t need all the Money features and all the specialized hardware everywhere. All the current buzzwords. And most of it started SDN, with Open Source – and is designed for it. Does Cloud, .. your vendor provide you with the features for new requirements in time? Your Missing a feature? Need a special feature to distinguish from the competition? You have access Features to the source code. Not just one company is setting the schedule on Support what the fix and when you get the software fix.