CCNA 3 - Capitulo 14.4

CCNA 3 - Capitulo 14.4

1. NETWORK AUTOMATION

   • INTENT BASED NETWORKING OVERVIEW
     • WHATS IS IBN ?
       • IBN IS THE MERGING INDUSTRY MODEL FOR THE NEXT GENARTION OF NETWORKING
       • IBN BUILDS ON SDN , TRANSFORMING A HARDWARE CENTRIC AND MANUAL APPROACH
         • TO DESIGNING AND OPERATING NETWORKS TO ONE THAT IS SOFTWARE CENTRIC AND FULLY AUTOMATED
     • BUSINESS OBJECTIVES
       • ARE EXPRESSED AS INTENT
     • IBN CAPTURES BUSINESS INTENT , USES ANALYTICS , MACHINE LEARNING AND AUTOMATION TO ALIGN
       • THE NETWORK CONTINUOUSLY AND DYNAMICALLY AS BUSINESS NEEDS CHANGE
     • IBN CAPTURES AND TRANSLATE BUSINESS INTENT INTO
       • NETWORK POLICIES THAT CAN BE AUTOAMTED AND APPLIED CONSISTENTLY ACROSS THE NETWORK
     • THREE ESEENTIAL FUNCTIONS
       • TRANSLATIONS
         • CAPTURE BUSINESS INTENT AND TRANSLATE TO POLICIES
         • ENABLES THE NETWORK ADMINISTRATOR TO EXPRESS
           • THE EXPECTED NETWORKING BEHAVIOR THE WILL BEST SUPPORT THE BUSINESS INTENT
       • ACTIVATION
         • ORCHESTRATE POLICIES AND CONFIGURE SYSTEMS
         • THE CAPTURED INTENT THEN NEEDS TO BE INTERPRETED
           • INTO POLICIES THAT CAN BE APPLIED ACROSS THE NETWORK.
         • THE ACTIVATION FUNCTION INSTALLS THESE POLICIES INTO
           • THE PHYSICAL AND VIRTUAL NETWORK INFRASTRUCTURE USING NETWORKWIDE AUTOMATION.
       • ASSURANCE
         • PROVIDE CONTINOUS INSIGHTS TO MANAGEMENT AND PERFORM CORRECTIVE ACTIONS
         • CONTINUOUSLY CHECK THAT THE EXPRESSED INTENT IS HONORED BY THE NETWORK AT ANY POINT IN TIME
         • THE ASSURANCE FUNCTION MAINTAINS A CONTINUOUS VALIDATION-AND-VERIFICATION LOOP.
       • PHYSICAL AND VIRTUAL NETWORK INFRAESTRUCTURE
         • ALL DEVICES IN THE NETWORK SUCH AS ROUTERS , SWITCHES , SERVERS , ACCESS POINTS , AND VIRTUAL MACHINES
   • NETWORK INFRAESTRUCTURE AS FABRIC
     • PERSPECTIVE OF IBN
       • THE PHYSICAL AND VIRTUAL NETWORK INFRAESTRUCTURE IS A FABRIC
     • WHATS IS FABRIC ?
       • TERM USED TO DESCRIBE AN OVERLAY THAT REPRESENTS THE LOGICAL TOPOLOGY USED TO VIRTUALLY CONNECT TO DEVICES
     • THE OVERLAY
       • LIMITS THE NUMBER OF DEVICES THE NETWORK MUST PROGRAM
       • IT ALSO PROVIDES SERVICES AND ALTERNATIVE FORWARDING METHODS NOT CONTROLLED BU THE UNDERLYING PHYSICAL DEVICES
         • FOR EXAMPLE, THE OVERLAY IS WHERE ENCAPSULATION IPSEC AND CONTROL AND PROVISIONING OF WIRELESS ACCESS POINTS (CAPWAP) OCCUR.
       • USING AN IBN SOLUTION
         • THE NETWORK ADMINISTRATOR CAN SPECIFY THROUGH POLICIES EXACTLY WHAT HAPPENS IN THE OVERLAY CONTROL PLANE.
       • HOW THE EQUIPMENTS ARE PHYSICALLY CONNECTED IS NOT A CONCERN OF THE OVERLAY
     • THE UNDERLAY
       • IS THE PHYSICAL TOPOLOGY THAT INCLUDES ALL HARDWARE REQUIRED TO MEET BUSINESS OBJECTIVES.
       • THE UNDERLAY NETWORK THE UNDERLAY REVEALS ADDITIONAL DEVICES AND SPECIFIES HOW THESE DEVICES ARE CONNECTED.
       • END POINTS, SUCH AS THE SERVERS , ACCESS THE NETWORK THROUGH THE LAYER 2 DEVICES.
       • THE UNDERLAY CONTROL PLANE IS RESPONSIBLE FOR SIMPLE FORWARDING TASKS.
   • IBN AND DNA CAN HELP YOU BRING IT ALL TOGETHER TO CREATE AN AUTOMATED NETWORK