tailieunhanh - Transport Diversity: Performance Routing (PfR) Design Guid

Transport diversity is a general terminology used for selecting or preferring a network exit-point for end-user application traffic across network topologies that have a variety of characteristics. These characteristics include things like monetary cost, reliability or availability, availability of bandwidth, and latency. One example of transport diversity is a branch office environment that has a primary path using Frame Relay and a backup or alternate path using basic rate ISDN. An example of why the concept of diversity is important is evident in Frame Relay outages that affected over 6,000 customers following a series of events that included a software upgrade. | 111 111 CISCO. Transport Diversity Performance Routing PfR Design Guide Cisco Validated Design I February 11 2008 Americas Headquarters Cisco Systems Inc. 170 West Tasman Drive San Jose CA 95134-1706 USA http Tel 408 526-4000 800 553-NETS 6387 Fax 408 527-0883 Text Part Number OL-15864-01 EDCS-610117 Cisco Validated Design The Cisco Validated Design Program consists of systems and solutions designed tested and documented to facilitate faster more reliable and more predictable customer deployments. For more information visit go validateddesigns. ALL DESIGNS SPECIFICATIONS STATEMENTS INFORMATION AND RECOMMENDATIONS COLLECTIVELY DESIGNS IN THIS MANUAL ARE PRESENTED AS IS WITH ALL FAULTS. CISCO AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES INCLUDING WITHOUT LIMITATION THE WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING USAGE OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THE DESIGNS EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE DESIGNS ARE SUBJECT TO CHANGE WITHOUT NOTICE. USERS ARE SOLELY RESPONSIBLE FOR THEIR APPLICATION OF THE DESIGNS. THE DESIGNS DO NOT CONSTITUTE THE TECHNICAL OR OTHER PROFESSIONAL ADVICE OF CISCO ITS SUPPLIERS OR PARTNERS. USERS SHOULD CONSULT THEIR OWN TECHNICAL ADVISORS BEFORE IMPLEMENTING THE DESIGNS. RESULTS MAY VARY DEPENDING ON FACTORS NOT TESTED BY CISCO. CCDE CCVP Cisco Eos Cisco StadiumVision the Cisco logo DCE and Welcome to the Human Network are trademarks Changing the Way We Work Live Play and Learn is a service mark and Access Registrar Aironet AsyncOS Bringing the Meeting To You Catalyst CCDA CCDP CCIE CCIP CCNA CCNP CCSP Cisco the Cisco Certified Internetwork Expert logo Cisco IOS Cisco Press Cisco Systems