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Nortel Simple Loop Prevention Protocol
Simple Loop Prevention Protocol (SLPP) in computer networking is a data link layer protocol developed by Nortel (previously acquired by Avaya, now a part of by Extreme Networks) to protect against Layer 2 network loops. SLPP uses a small hello packet to detect network loops. The SLPP protocol checks packets from the originating switch and the peer switch in a SMLT configuration. Sending hello packets on a per VLAN basis allows SLPP to detect VLAN based network loops for un-tagged as well as tagged IEEE 802.1Q VLAN link configurations. If a loop is detected, the associated port is shut down. Compatible equipment * Avaya VSP 9000 Series - Software version 3.0 or above * Avaya VSP 7000 Series - Software version 10.0 or above * Avaya ERS 8600 - Software version 4.1 or above [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Networking
A computer network is a set of computers sharing resources located on or provided by network nodes. The computers use common communication protocols over digital interconnections to communicate with each other. These interconnections are made up of telecommunication network technologies, based on physically wired, optical, and wireless radio-frequency methods that may be arranged in a variety of network topologies. The nodes of a computer network can include personal computers, servers, networking hardware, or other specialised or general-purpose hosts. They are identified by network addresses, and may have hostnames. Hostnames serve as memorable labels for the nodes, rarely changed after initial assignment. Network addresses serve for locating and identifying the nodes by communication protocols such as the Internet Protocol. Computer networks may be classified by many criteria, including the transmission medium used to carry signals, bandwidth, communications protocols ... [...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] |
Nortel
Nortel Networks Corporation (Nortel), formerly Northern Telecom Limited, was a Canadian multinational telecommunications and data networking equipment manufacturer headquartered in Ottawa, Ontario, Canada. It was founded in Montreal, Quebec, in 1895 as the Northern Electric and Manufacturing Company. Until an antitrust settlement in 1949, Northern Electric was owned principally by Bell Canada and the Western Electric Company of the Bell System, producing large volumes of telecommunication equipment based on licensed Western Electric designs. At its height, Nortel accounted for more than a third of the total valuation of all companies listed on the Toronto Stock Exchange (TSX), employing 94,500 people worldwide. In 2009, Nortel filed for bankruptcy protection in Canada and the United States, triggering a 79% decline of its corporate stock price. The bankruptcy case was the largest in Canadian history and left pensioners, shareholders and former employees with enormous losses. ... [...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] |
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] |
SMLT
Multi-link trunking (MLT) is a link aggregation technology developed at Nortel in 1999. It allows grouping several physical Ethernet links into one logical Ethernet link to provide fault-tolerance and high-speed links between routers, switches, and servers. MLT allows the use of several links (from 2 up to 8) and combines them to create a single fault-tolerant link with increased bandwidth. This produces server-to-switch or switch-to-switch connections that are up to 8 times faster. Prior to MLT and other aggregation techniques, parallel links were underutilized due to Spanning Tree Protocol’s loop protection. Fault-tolerant design is an important aspect of Multi-Link Trunking technology. Should any one or more than one link fail, the MLT technology will automatically redistribute traffic across the remaining links. This automatic redistribution is accomplished in less than half a second (typically less than 100 millisecond) so no outage is noticed by end users. This high speed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avaya VSP 9000 Series
Avaya Virtual Services Platform 9000 Series or VSP 9000 is a set of modular chassis switches used in enterprise and data center networks, manufactured by Avaya. The VSP 9000 is used by institutions which are suffering from performance limitations, need to simplify their network infrastructure in a virtualized environment, or require 10 Gigabit Ethernet today with the option to scale to 40 or 100 Gigabit Ethernet in the future. It is also an option for companies who are looking to reduce the power and cooling cost in order to maximize the cost-effectiveness of their infrastructures; this unit was also designed and is expected to have a lifespan of seven-to-ten years. In 2013 the Olympics network backbone is built with VSP 9000 Switches supporting 30,000 users and up to 54 terabits per second of traffic. General Specifications The VSP 9000 Series consists of two Chassis models; the original 9012 Chassis supports twelve (12) horizontally-orientated front-panel slots, ten (10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avaya VSP 7000 Series
Avaya Virtual Services Platform 7000 Series or VSP 7000 is a set standalone/stackable switches, used in enterprise data networks, and data centers, manufactured by Avaya. This product is primarily offered to satisfy the Top-of-Rack (ToR) role for server farms and virtualized data centers. It supports Avaya's extended Shortest Path Bridging (SPB) implementation "Fabric Connect", and is future-ready for Edge Virtual Bridging (EVB) – IEEE 802.1Qbg, and Fiber Channel over Ethernet (FCoE). The system incorporates fifth generation application-specific integrated circuit (ASIC) chips with redundant and hot-swappable power supplies, fans, and expansion modules. The VSP 7000's unique architecture allows it to be meshed - fully or partially - with like devices, creating a high-capacity, low-latency network of up to 500 units, supporting up to 16,000 ports of 10GbE supported by a virtual backplane of up to 280Tbit/s History In November 2010 Avaya introduced its Virtual Enterprise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avaya ERS 8600
The Avaya Ethernet Routing Switch 8600 or ERS 8600, previously known as the ''Passport 8600'' or the ''Accelar 8000'', is a modular chassis combination hardware router and switch used in computer networking. The system, originally designed and manufactured by Nortel, was manufactured by Avaya from 2009 until 2017. The system provided the 10G Ethernet equipment backbone for the 2010 Winter Olympics games, providing service for 15,000 VoIP Phones, 40,000 Ethernet connections and supporting 1.8 million live spectators. The system is configurable as a 1.440 Terabit Switch cluster using SMLT and R-SMLT protocols, to provide high reliability cluster failover (normally less than 100 millisecond). There were three chassis options; a 3-slot chassis most commonly used for access or distribution / aggregation of switches which has a MTBF of 2,043,676hr., a 6-slot chassis for backbones of low density or high space premium environments, and a 10-slot chassis for high availability and high scal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avaya ERS 4000 Series
Ethernet routing switch 4000 series or (ERS 4000) in computer networking terms are stackable layer-3 ( routers) and layer-2 ( switches) designed and manufactured by Avaya for Ethernet devices. The ERS 4000 series consists of two major groups of devices, the ERS 4500 models and the ERS 4800 models. History The first set of ERS 4500 series became available in February 2007 from Nortel with the release of software version 5.0. The switches are 1U high and five models were originally available which consisted of the; 4526FX, 4550T, 4550T-PWR, 4548GT and 4548GT-PWR. In 2008 a detailed evaluation of the systems was performed by Tolly. In 2009 The United States Department of Defense performed extensive testing of the ERS 4500 series and approved and certified these for use in the Assured Services Voice Application Local Area Network (ASVALAN) systems of the DoD. In March 2011 the Australian Department of Defense installed the ERS 4500 series with other Avaya data equipment to suppor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ERS 3500 And ERS 2500 Series
Ethernet Routing Switch 3500 series and Ethernet Routing Switch 2500 series or ERS 3500 and ERS 2500 in data computer networking terms are stackable routing switches designed and manufactured by Avaya. The Switches can be stacked up to eight units high through a 'stacking' configuration; Avaya markets this capability under the term 'Avaya Virtual Enterprise Network Architecture (VENA) Stackable Chassis'. This series of Switches consists of six ERS 3500 models, the ERS 3526T, ERS 3526T-PWR+, ERS 3510GT, ERS 3510GT-PWR+, ERS3524GT, ERS3524GT-PWR+ and four different ERS 2500 models, the ERS 2526T, ERS 2526T-PWR, ERS 2550T and the ERS 2550T-PWR. The 'PWR' suffix designation identifies the Switch that can provide Power-over-Ethernet on the copper Ethernet ports, the '+' suffix designation indicates that the Switch can provide PoE plus on the copper ports. These Switches are all covered by Avaya's Lifetime warranty. History ERS 3500 This series of Switches became available in Ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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