NETWORK WORLD NEWSLETTER: OPTICAL NETWORKING 09/08/04 Dear [EMAIL PROTECTED],
In this issue: * Virtual Private LAN Service explained * Links related to Optical Networking * Featured reader resource _______________________________________________________________ This newsletter is sponsored by Xerox Want to learn the key steps to building a document output strategy that will enhance productivity and reduce costs for your organization? Start by downloading Xerox's white paper, Optimizing Document Output ROI. See how Xerox's solutions can help you manage devices, reduce costs and even boost productivity. http://www.fattail.com/redir/redirect.asp?CID=80880 _______________________________________________________________ NETWORK WORLD SPECIAL REPORTS NOW AVAILABLE Focused reports on compelling industry topics, Network World Special Reports are available online at Network World Fusion. Network World Special Reports on IP Telephony Security, the State of Wireless LANs, trends in the networked world and more are currently available. Download any or all of our Special Reports at: http://www.fattail.com/redir/redirect.asp?CID=79673 _______________________________________________________________ Today's focus: The skinny on VPLS By Tim Greene Virtual Private LAN Service technology tries to overcome some of the inherent shortcomings of WANs, namely complexity, limited bandwidth and application performance degradation. VPLS combats complexity by presenting corporate networks with an Ethernet interface they plug into their routers or switches and then simulating a LAN routing environment among corporate sites. Because access to VPLS is Ethernet, bandwidth can scale in increments of 1M bit/sec up to the speed of the wire, giving customers the option to buy the bandwidth they need to provide the performance they want. Performance degradation can be overcome by use of QoS features of Multi-protocol Label Switching (MPLS), VPLS' underlying backbone technology. VPLS combines the Layer 2 nature of Ethernet with Layer 2 MPLS label-switched paths to create the impression of a circuit known as a pseudo-wire. These customer pseudo-wires are mapped through MPLS label-switched paths across the carrier backbone. Traffic from individual servers and desktops in customer networks is switched based on their media access control addresses, with the providers' edge routers keeping track of them and making sure traffic from them is switched along the appropriate paths. VPLS defines the encapsulation of traffic from the Ethernet access segment of the network to the MPLS core to maintain service quality needed to maintain acceptable application performance. By creating a fully routed environment, VPLS provides any-to-any, fully meshed networks. To create similar networks using dedicated circuits, frame relay or ATM involves complex network design and multiple permanent virtual circuits, which can be expensive. Simplifying fully meshed networks for customers is a benefit of VPLS, but it requires work on the carrier's side to set up the full mesh of label-switched paths among its edge routers. It also requires provisioning each customer's service within these paths. Several groups are working on standards for managing VPLS networks to make the task easier for service providers. _______________________________________________________________ To contact: Tim Greene Tim Greene is a senior editor at Network World, covering virtual private networking gear, remote access, core switching and local phone companies. You can reach him at <mailto:[EMAIL PROTECTED]>. _______________________________________________________________ This newsletter is sponsored by Xerox Want to learn the key steps to building a document output strategy that will enhance productivity and reduce costs for your organization? Start by downloading Xerox's white paper, Optimizing Document Output ROI. See how Xerox's solutions can help you manage devices, reduce costs and even boost productivity. http://www.fattail.com/redir/redirect.asp?CID=80880 _______________________________________________________________ ARCHIVE LINKS Breaking optical-networking news from Network World, The Edge and around the 'Net, updated daily: http://www.nwfusion.com/topics/optical.html Archive of the Optical Networking newsletter: http://www.nwfusion.com/newsletters/optical/index.html _______________________________________________________________ FEATURED READER RESOURCE CHECK OUT NW FUSION'S NEW WHITE PAPER LIBRARY NW Fusion's White Paper Library was recently re-launched with new features and improved capabilities! Sort NW Fusion's library of white papers by Date and Vendor, view white papers by TECHNCIAL CATEGORY, mouse over white paper descriptions and take advantage of our IMPROVED white paper search engine. 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