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Unidirectional Link Detection
Unidirectional Link Detection (UDLD) is a data link layer protocol from Cisco Systems to monitor the physical configuration of the cables and detect unidirectional links. UDLD complements the Spanning Tree Protocol which is used to eliminate switching loops. :* Unidirectional Link Detection (UDLD) is one of two major features (UDLD and loop guard) in Cisco Switches to prevent Layer 2 loops. :* Spanning-Tree Protocol (STP) resolves redundant physical topology into a loop-free, tree-like forwarding topology via blocking one or more ports. : However, Unidirectional Link failure can cause " traffic blackholing" and loops in the Switch topology. :* In order to detect the unidirectional links before the forwarding loop is created, UDLD works by exchanging protocol packets between the neighboring devices. :* In order for UDLD to work, both switch devices on the link must support UDLD and have it enabled on respective ports. Description If two devices, A and B, are connected via a pai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Link Layer
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between nodes on a network segment across the physical layer. The data link layer provides the functional and procedural means to transfer data between network entities and may also provide the means to detect and possibly correct errors that can occur in the physical layer. The data link layer is concerned with local delivery of frames between nodes on the same level of the network. Data-link frames, as these protocol data units are called, do not cross the boundaries of a local area network. Inter-network routing and global addressing are higher-layer functions, allowing data-link protocols to focus on local delivery, addressing, and media arbitration. In this way, the data link layer is analogous to a neighborhood traffic cop; it endeavors to arbitrate between parties contending for access to a medium, without con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avaya
Avaya Holdings Corp., often shortened to Avaya (), is an American multinational technology company headquartered in Durham, North Carolina, that provides cloud communications and workstream collaboration services. The company's platform includes unified communications (UCaaS), contact center other services. The company provides services to 220,000 customer locations in 190 countries. History In 1995, Lucent Technologies was spun off from AT&T, and Lucent subsequently spun off units of its own in an attempt to restructure its struggling operations. .html" ;"title="/sup>">/sup> Avaya was then spun off from Lucent as its own company in 2000 (Lucent merged with Alcatel SA in 2006, becoming Alcatel-Lucent, which was purchased in turn by Nokia in 2016). It remained a public company from 2000 to 2007. In October 2007, Avaya was acquired by two private-equity firms, TPG Capital and Silver Lake Partners, for $8.2 billion. On January 19, 2017, Avaya filed for Chapter 11 bankruptcy. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brocade Communications Systems
Brocade is an American technology company specializing in storage networking products, now a subsidiary of Broadcom Inc. The company is known for its Fibre Channel storage networking products and technology. Prior to the acquisition, the company expanded into adjacent markets including a wide range of IP/Ethernet hardware and software products. Offerings included routers and network switches for data center, campus and carrier environments, IP storage network fabrics; Network Functions Virtualization (NFV) and software-defined networking (SDN) markets such as a commercial edition of the OpenDaylight Project controller; and network management software that spans physical and virtual devices. On November 2, 2016, Singapore-based chip maker Broadcom Limited announced it was buying Brocade for about $5.5 billion. As part of the acquisition, Broadcom divested all of the IP networking hardware and software-defined networking assets. Broadcom has since re-domesticated to the Unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
D-Link
D-Link Corporation is a Taiwanese multinational networking equipment manufacturing corporation headquartered in Taipei, Taiwan. It was founded in March 1986 in Taipei as ''Datex Systems Inc.'' History D-Link Corporation changed its name from Datex Systems Inc. in 1994, when it went public and when it became the first networking company on the Taiwan Stock Exchange. It is now publicly traded on the TSEC and NSE stock exchanges. In 1988, Datex Systems Inc. released the industry's first peer-to-peer LANSmart Network Operating System, able to run concurrently with early networking systems such as Novell's NetWare and TCP/IP which most small network operating systems could not do at the time. In 2007, it was the leading networking company in the small to medium business (SMB) segment worldwide with 21.9% market share.Compiled from In-Stat Q1 2007 ''Wireless LAN Equipment Market Share Report'' In March 2008, it became the market leader in Wi-Fi product shipments worldwide, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethernet In The First Mile
Ethernet in the first mile (EFM) refers to using one of the Ethernet family of computer network technologies between a telecommunications company and a customer's premises. From the customer's point of view, it is their first mile, although from the access network's point of view it is known as the last mile. A working group of the Institute of Electrical and Electronics Engineers (IEEE) produced the standards known as IEEE 802.3ah-2004, which were later included in the overall standard IEEE 802.3-2008. Although it is often used for businesses, it can also be known as Ethernet to the home (ETTH). One family of standards known as Ethernet passive optical network (EPON) uses a passive optical network. History With wide, metro, and local area networks using various forms of Ethernet, the goal was to eliminate non-native transport such as Ethernet over Asynchronous Transfer Mode (ATM) from access networks. One early effort was the EtherLoop technology invented at Nortel Networks in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OA&M
Operations, administration and management or operations, administration and maintenance (OA&M or OAM) are the processes, activities, tools, and standards involved with operating, administering, managing and maintaining any system. This commonly applies to telecommunication, computer networks, and computer hardware. In particular, Ethernet operations, administration and maintenance (EOAM) is the protocol for installing, monitoring and troubleshooting Ethernet metropolitan area network (MANs) and Ethernet WANs. It relies on a new, optional sublayer in the data link layer of the OSI model. The OAM features covered by this protocol are discovery, link monitoring, remote fault detection, remote loopback Standards * Fault management and performance monitoring ( ITU-T Y.1731) - Defines performance monitoring measurements such as frame loss ratio, frame delay and frame delay variation to assist with SLA assurance and capacity planning. For fault management the standard defines contin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethernet
Ethernet () is a family of wired computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN). It was commercially introduced in 1980 and first standardized in 1983 as IEEE 802.3. Ethernet has since been refined to support higher bit rates, a greater number of nodes, and longer link distances, but retains much backward compatibility. Over time, Ethernet has largely replaced competing wired LAN technologies such as Token Ring, FDDI and ARCNET. The original 10BASE5 Ethernet uses coaxial cable as a shared medium, while the newer Ethernet variants use twisted pair and fiber optic links in conjunction with switches. Over the course of its history, Ethernet data transfer rates have been increased from the original to the latest , with rates up to under development. The Ethernet standards include several wiring and signaling variants of the OSI physical layer. Systems communicating over Ethernet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruckus Networks
Ruckus Networks (formerly known as Ruckus Wireless) is a brand of wired and wireless networking equipment and software owned by CommScope. Ruckus offers Network switch, Switches, Wi-Fi Wireless access point, access points, Citizens Broadband Radio Service, CBRS access points, Controllers, Management systems, Cloud management, AAA/Bring your own device, BYOD software, Artificial intelligence, AI and Machine learning, ML analytics software, location software and Internet of things, IoT controller software products to mobile carriers, broadband service providers, and corporate enterprises. As a company, Ruckus invented and has patented wireless voice, video, and data technology, such as adaptive antenna arrays that extend signal range, increase data rates, and avoid interference, providing distribution of delay-sensitive content over standard 802.11 Wi-Fi. Ruckus began trading on the New York Stock Exchange in 2012, and was delisted in 2016, after it was acquired by Brocade Communica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brocade Communications Systems
Brocade is an American technology company specializing in storage networking products, now a subsidiary of Broadcom Inc. The company is known for its Fibre Channel storage networking products and technology. Prior to the acquisition, the company expanded into adjacent markets including a wide range of IP/Ethernet hardware and software products. Offerings included routers and network switches for data center, campus and carrier environments, IP storage network fabrics; Network Functions Virtualization (NFV) and software-defined networking (SDN) markets such as a commercial edition of the OpenDaylight Project controller; and network management software that spans physical and virtual devices. On November 2, 2016, Singapore-based chip maker Broadcom Limited announced it was buying Brocade for about $5.5 billion. As part of the acquisition, Broadcom divested all of the IP networking hardware and software-defined networking assets. Broadcom has since re-domesticated to the Unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extreme Networks
Extreme Networks is an American networking company based in San Jose, California. Extreme Networks designs, develops, and manufactures wired and wireless network infrastructure equipment and develops the software for network management, policy, analytics, security and access controls. History Extreme Networks was established by co-founders Gordon Stitt, Herb Schneider, and Stephen Haddock in 1996 in California, USA, with its first offices located in Cupertino, which later moved to Santa Clara, and later to San Jose. Early investors included Norwest Venture Partners, AVI Capital Management, Trinity Ventures, and Kleiner Perkins Caufield & Byers. Gordon Stitt was a co-founder and served as chief executive officer until August 2006, when he retired and became chairman of the board of directors. The initial public offering in April 1999 was listed on the NASDAQ stock exchange as ticker "EXTR." In April 2013, Charles W. Berger (from ParAccel as it was acquired by Actian) replaced Osc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cisco Systems
Cisco Systems, Inc., commonly known as Cisco, is an American-based multinational corporation, multinational digital communications technology conglomerate (company), conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, software, telecommunications equipment and other high-technology services and products. Cisco specializes in specific tech markets, such as the Internet of Things (IoT), internet domain, domain security, videoconferencing, and energy management with List of Cisco products, leading products including Webex, OpenDNS, XMPP, Jabber, Duo Security, and Cisco Jasper, Jasper. Cisco is one of the List of largest technology companies by revenue, largest technology companies in the world ranking 74 on the Fortune 100 with over $51 billion in revenue and nearly 80,000 employees. Cisco Systems was founded in December 1984 by Leonard Bosack and Sandy Lerner, two Stanford University computer scientists who ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HP Networking Products
HP Networking products include: * Fixed configuration Ethernet switches including stackable switches. * Modular Chassis switches * Wide area network routers * Wireless access points, adapters, and connectivity products * Internet access gateways and firewalls, both wired and wireless * Network management applications * Network security platforms including the TippingPoint Intrusion Prevention System. * IP Telephony applications including PBX and CTI solutions. HP Networking arranged its products into four primary product series: * A-Series: Data center, campus and branch network switches and routers. Predominantly heritage H3C. * E-Series: Campus and branch network switches, voice, and wireless products. Mix of heritage ProCurve and 3Com. * V-Series: Small business smart managed and unmanaged switches and wireless products. Mix of heritage ProCurve and 3Com. * S-Series: Enterprise and small business security products. Heritage TippingPoint. Below is a summary of key products. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
