CCNA 2 - Capitulo 14.4

CCNA 2 - Capitulo 14.4

1. ROUTING CONCEPTS

   • IP ROUTING TABLE
     • ROUTE SOURCES (ROUTE TABLE )
       • LIST OF ROUTES KNOW (PREFIX AND PREFIX LENGHTS) - DERIVED FROM
         • DIRETLY CONNECTED NETWORKS
           • L
             • PREFIX LENGHT IS
               • S /32 - IPV4
               • /128 IPV6
             • ADDRESS ASSIGNED ROUTER INTERFACE
               • DETERMINE WHEN IT RECEIVES A PACKET
           • C
             • DIRETLY CONNECTED NETWORK
           • INTERFACE IS CONFIGURED WITH IP IS ACTIVED
           • CODE IDENTIFIES ROUTER WAS LEARNED
         • STATIC ROUTES
           • S - STATIC ROUTE
             • MANUALLY CONFIGURED
               • EXPLICIT PATH BETWEEN TWO NETWORKING DEVICES
             • BENEFITS
               • IMPROVID SECURITY
               • RESOURCES EFFICIENCY
               • LESS BANDWIDTH THAN
                 • DYNAMIC PROTOCOL
               • NO CPU CYCLES ARE USED
                 • TO CALCULATE AND COMMUNICATE ROUTES
             • DISADVANTAGE
               • NOT AUTOMATICALLY UPDATE
               • LACK OF AUTOMATIC RECONFIGURATION
                 • IF THE NETWORK TOPOLOGY CHANGES
             • THREE PRIMARY USES
               • IT USES A SINGLE DEFAULT ROUTE
                 • WHEN DOS NOT HAVE A MORE SPECIFIC ROUTE
                 • GENERALLY USED FOR INTERNET ACCESS
               • ROUTES TO AND FROM STUB NETWORKS
                 • WHATS IS STUB NETWORK ?
                   • IS A NETWORK ACCESSES BY A SINGLE ROUTE
                   • AND THE ROUTER HAS ONLY ONE NEIGHBOR
               • EASE MAINTENENCE SMALLER NETWORKS
             • HOW CAN THEY BE CREATED?
               • IPV4
                 • R1(CONFIG)# IP ROUTE (1) 10.0.4.0 (1) 255.255.255.0 (2) 10.0.3.2
                   • (1) REMOTE IPV4 NETWORK ADDRESS
                   • (2) IPV4 ADDRESS OF NEXT HOP ROUTER
               • IPV6
                 • R1 (CONFIG) # IPV6 ROUTE (1) 2001.DB8.ACAD. 4 :: /64 (2) 2001.DB8.ACAD.3 :: 2
                   • (2) IPV6 ADDRESS OF NEXT HOP ROUTER
                   • (1) REMOTE IPV6 NETWORK ADDRESS
         • DYNAMIC ROUTING PROTOCOLS
           • O - OSPF
           • D - EIGRP
           • CODE IDENTIFIES ROUTER WAS LEARNED
           • AUTOMATICALLY SHARE INFORMATION ABOUT
             • REACHABILITY AND STATUS OF REMOTE NETWORKS
           • PERFORM SEVERAL ACTIVITIES
             • NETWORK DISCOVERY
               • IS THE ABILITY OF A ROUTING PROTOCOL SHARE INFORMATION
                 • ABOUT THE NETWORKS THAT IT KNOW ABOUT WITH OTHER ROUTERS THAT
                   • ARE ALSO USING SAME ROUTING PROTOCOL
             • MAINTANING ROUTING TABLES
           • BENEFITS
             • ABILITY TO SELECT A BEST PATH
             • AUTOMATICALLY DISCOVER A NEW BEST PATH
               • IS OCCOURS CHANGE IN THE TOPOLOGY
     • * - DEFAULT ROUTE
       • NOT CONTAIN A SPECIFIC ROUTE DESTINATION IP ADDRESS
       • STUB NETWORK
       • SIMILIAR GATEWAY ON A HOST
       • CAN BE EITHER A
         • STATIC OR DYNAMIC
       • CAN IT BE REPRESENTED
         • 0.0.0.0/0 - IPV4
         • ::/0 - IPV6
         • THE MEANS THAT ZERO OR NO BITS
           • NEED TO MATCH BETWEEN THE DESTINATION AND DEFAULT ROUTE
       • BENIFITS
         • REDUCE THE NUMBER OF ROUTES
       • SMALL OFFICES AND HOME OFFICE
         • USERFUL
           • EXIT POINT TO SERVICE PROVIDE ROUER (ISP)
     • VIA
       • NEXT HOP
     • STRUCTURE OF AN IPV4 ROUTING TABLE
       • HOW IPV4 WAS INITIALLY DEVELOPED USING CLASSFUL
         • ALTHOUGH THE LOOKUP PROCESS NO LONGER USES CLASSES
           • THE ROUTING TABLE MANTAINS SAME CLASSFULL STRUCTURE
       • INDENTED ENTRY - CHILD ROUTE
         • IS THE SUBNET OF A CLASSFUL ADDRESS (A , B OR C NETWORK )
         • DIRETLY CONNECTED ALWAYS BE INDENTED
         • CHILD ROUTE INCLUDE
           • ROUTE SOURCE (STATIC , DYNAMIC ... )
           • ALL THE FORWARDIG INFORMATION SUCH AS THE NEXT HOP
         • EX OF CHILD ROUTE - 10.0.0.0/24
       • PARENT ROUTE
         • THE CLASSFULL NETWORK OF THIS ROUTE ENTRY - CHILDREN ROUTE
           • EX OF PARENT ROUTE - 10.0.0.0/8
     • STRUCTURE OF AN IPV6 ROUTING TABLE
       • CLASFULL WAS NEVER PASR IPV6
       • ROUTING TABLE IS VERY STRIGHT FORWARD