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 TitleDate AddedCompany
whitepaper Linux Virtual Server for Scalable Network Services2008-01-01 Institute of Electrical and Electronics Engineers
  This paper describes the motivation, design, internal implementation of Linux Virtual Server. The goal of Linux Virtual Server is to provide a basic framework to build highly scalable and highly available network services using a large cluster of commodity servers. The TCP/IP stack of Linux kernel is extended to support three IP load balancing techniques, which can make parallel services of different kinds of server clusters to appear as a service on a single IP address. Scalability is achieved by transparently adding or removing a node in the cluster, and high availability is provided by detecting node or daemon failures and reconfiguring the system appropriately.

Tags: Scalability, Linux Server OS		   
whitepaper Tivoli Workload Scheduler for z/OS TCP/IP Connection Support2007-12-24 IBM
  Now one can connect TWS for z/OS components using TCP/IP. This means that the Controller, Tracker, Data Store, and Remote Dialog & PIF no longer need to use SNA (VTAM & APPC) for off SYSPLEX (non-XCF) connections. This TCP/IP support is provided in a Small Programming Enhancement (SPE) for TWS for z/OS version 8.3 as APAR PK40969 (PTFs UK26450, UK26455 & UK26475). This paper describes how to implement the TCP/IP protocol for TWS for z/OS component communications.

Tags: Mainframes		   
whitepaper How Cisco IT Deploys Closed-Circuit TV Cameras Over the Secure IP Network2007-12-21 Cisco Systems
  Cisco uses video surveillance to help keep its work environment secure. Two years ago, Cisco used a combination of cameras and Video Cassette Recorders (VCRs) to monitor building entrances and other high-security locations on its campuses. Managing the VCRs, coaxial cabling, and tapes was labor intensive and prone to human error. Looking for a better solution, Cisco implemented Closed-Circuit TV (CCTV) over IP for surveillance. The system uses digital video and uses IP to carry the video signal across the network to digital video recorders in a centrally managed data center. Since making the change, Cisco has improved security, enhanced building access control, and significantly reduced security costs.

Tags: Streaming Media, Security Management		   
whitepaper Evaluating the Use of Spam-Triggered TCP/IP Rate Control to Protect SMTP Servers2007-12-10 Swinburne University of Technology
  This paper examines an approach to spam mitigation that rate limits incoming TCP/IP connections to an SMTP server based on the real-time detection of spam within the SMTP message exchange. Our approach is motivated by a desire to cause increased resource consumption at the spammer end of each SMTP connection, and to avoid the negative impact of false-positives by eventually allowing all emails through. It is called as the tool MT Proxy. MT ProxyĂ­s spam analysis and traffic differentiation characteristic are analyzed to evaluate the efficacy of this architectural approach to fighting spam.   
whitepaper SAVVIS Takes Care of Business: Partnering With Cisco For Managed Services2007-12-04 Cisco Systems
  SAVVIS managed services deployed through a Cisco IP NGN network deliver cost savings, improved performance, visibility and application availability to its clients.

Tags: Network Design		   
whitepaper Modeling TCP in a Multi-Rate Multi-User CDMA System2007-12-01 Sprint
  Modern CDMA wireless channels support multiple transmission rates, which can be dynamically assigned to users based on traffic demand. However, in practice, assignment of high rate channels comes with the penalty of increased power as well as smaller orthogonal codes, which constrains their assignment to only a subset of active users. This motivates the need to carefully control high rate channel assignments so as to minimize power and achieve fairness among users. The work discusses in this paper, proposes a simple class of channel allocation policies to achieve this goal for TCP sessions. The paper develops an analytical model that explicitly captures both TCP dynamics and the impact of multiple users contending for a shared resource to evaluate the performance of the allocation policy.

Tags: Mobile - Wireless Communications, TDMA - CDMA		   
whitepaper MPLS IP VPN Migration Profiles: Should Your Company Consider an IP VPN?2007-12-01 Cisco Systems
  This Webcast explores the emerging popularity of IP voice, video and data services and how businesses today, particularly medium-sized businesses, are looking to their networks for the performance that they need to stay competitive. The presenter asks and answers these questions. What exactly is an MPLS IP VPN? Are there differences in MPLS IP VPNs? Who are the prime candidates for an MPLS IP VPN? What are the benefits of an MPLS IP VPN? Does it make sense to outsource an MPLS IP VPN to a respected service provider? "MPLS IP VPN Migration Profiles" looks at the critical factors that go into an MPLS IP VPN migration decision for businesses including the rising costs and complexity of legacy networks.

Tags: VPNs, MPLS		   
whitepaper Cisco Systems IP Network-Centric Video Surveillance2007-12-01 Cisco Systems
  Video surveillance has been a key component of many organization's safety and security group for decades. As an application, video surveillance has demonstrated its value and benefits countless times by providing real-time monitoring of a facility's environment, people, and assets and recording events for subsequent investigation, proof of compliance / audit purposes. As security risks increase, the need to visually monitor and record events in an organization's environment has become even more important. Moreover, the value of video surveillance has grown significantly with the introduction of motion, heat, and sound detection sensors as well as sophisticated video analytics. As a result, many nontraditional groups have also found value in video monitoring and recording.

Tags: Streaming Media, Security Management		   
whitepaper Cisco Unified Communications Manager 6.1 TCP and UDP Port Usage2007-11-19 Cisco Systems
  This paper provides a list of the TCP and UDP ports that Cisco Unified Communications Manager (formerly Cisco Unified CallManager) 6.1 uses for intracluster connections and for communications with external applications or devices. It provides important information for the configuration of firewalls, Access Control Lists (ACLs), and Quality of Service (QoS) on a network when an IP Communications solution is implemented.   
whitepaper Understanding TCP Over TCP: Effects of TCP Tunneling on End-to-End Throughput and Latency2007-11-16 Osaka University
  TCP tunnel is a technology that aggregates and transfers packets sent between end hosts as a single TCP connection. By using a TCP tunnel, the fairness among aggregated flows can be improved and several protocols can be transparently transmitted through a firewall. Currently, many applications such as SSH, VTun, and HTun use a TCP tunnel. However, since most applications running on end hosts generally use TCP, two TCP congestion controls (i.e., end-to-end TCP and tunnel TCP) operate simultaneously and interfere each other. Under certain conditions, it has been known that using a TCP tunnel severely degrades the end-to-end TCP performance. Namely, it has known that using a TCP tunnel drastically degrades the end-to-end TCP throughput for some time, which is called TCP meltdown problem.