CCNA 2 - Capitulo 15

CCNA 2 - Capitulo 15

1. IP STATIC ROUTING

   • MANY SITUATIONS WHERE A MANUALLY CONFIGURED A STATIC ROUTER IS YOUR BEST OPTION
   • STATIC ROUTE
     • TYPES OF STATIC ROUTES
       • DEFAULT STATIC ROUTE
         • IPV4 DEFAULT STATIC ROUTER
           • R1(CONFIG)# IP ROUTE 0.0.0.0 0.0.0.0 {IP-ADDRESS | EXIT-INT}
             • EXAMPLE - R1(CONFIG)# IP ROUTE 0.0.0.0 0.0.0.0 172.16.2.2
         • IPV6 DEFAULT STATIC ROUTER
           • R1(CONFIG)# IPV6 ROUTE ::/0 {IPV6-ADDRESS | EXIT-INTEF}
             • EXAMPLE - R1(CONFIG)#IPV6 ROUTE ::/0 2001:DB?ACAD:2::2
         • INSTEAD OF ROUTERS STORING FOR ALL OF THE NETWORKS IN THE INTERNET
           • THEY CAN STORE A SINGLE DEFAULT OUTER TO REPRESENT ANY NETWORK THA IS NOT IN THE ROUTING TABLE
         • IF A MORE SPECIFIC MATCH DOES NOT EXIST
           • THEN THE DEFAULT ROUTER IS SED AS THE GATEWAY OF LAST RESORT
         • WHERE IT IS COMMONLY USED
           • EDGE ROUTER TO A SERVICE PROVIDER NETWORK
           • STUB ROUTER (A ROUTER WITH ONLY ONE UPTREAM NEIGHBOR ROUER)
         • ASTERISK (*)
       • FLOATING STATIC ROUTE
         • IPV4 ADDRESS
           • (CONFIG)# IP ROUTE 0.0.0.0 0.0.0.0 172.16.2.2 5
             • DON'T APPEAR OF THE RIB
             • HOW VIEW ?
               • R1#SHOW RUN VERIFY FLOOATING ROUTE
           • R1(CONFIG)# IP ROUTE 0.0.0.0 0.0.0.0 172.16.2.2
             • APPEAR THE FIB
         • IPV6 ADDRESS
           • R1(CONFIG)# IPV6 ROUTE ::/0 2001:db8:feed:10::2 (5)
           • R1(CONFIG)# IPV6 ROUTE ::/0 2001:db8:feed:10::2
         • WHATS YOUR PURPOSE ?
           • BACKUP PATH TO PRIMARY STATIC OR DYNAMIC
             • IS CONFIGURED WITH A HIGHER ADMINISTRATIVE DISTANCE
             • IS ONLY USED WHEN THE PRIMARY IS NOT AVAILABLE
         • THE STATIC FLOATING ROUTE APPEARS ON THE RIB, BUT NOT ON THE FIB (WHILE IN STANDBY MODE).
         • BY DEFAULT, THE STATIC ROUTE AD IS 1, BUT IT CAN BE MODIFIED.
         • WHAT IF NO AD IS CONFIGURED?
           • DEFAUL VALUE 1 IS USED , AND THE TRAFFIC WILL BE LOAD BALANCED , WITH BOTH REMAINING IN THE FIB
       • SUMMARY STATIC ROUTE
       • STANDARD STATIC ROUTE
         • DIRETLY CONNECTED STATIC ROUTE
           • EXIT INTERFACE IS SPECIFIED
           • IPV4
             • R1(CONFIG)# IP ROUTE 192.168.2.0 255.255.255.0 S0/1/1
           • IPV6
             • R1(CONFIG)# IPV6 ROUTE 2001:ABCD:1234:2::/64 S0/1/1
           • SHOULD ONLY USED WITH POINT-TO-POINT SERIAL INTERFACES
         • FULLY SPECEFIED STATIC ROUTE
           • NEXT HOP IP ADDRESS AND EXIT INTERFACE ARE SPECIFIED
           • IPV4 - EXAMPLE
             • R1(CONFIG)# IP ROUTE 172.16.1.0 255.255.255.0 G0/0/1 172.16.2.2
           • IPV6 - EXAMPLE
             • R1(CONFIG)# IPV6 ROUTE 2001:ABCD:1234:2::/64 G0/1 FE80::254
               • IPV6 FULLY SPECIFIED MUST BE USED WHEN LLA IS USED AS TE NEXT HOP ADDRESS
           • WHEN IS USED ?
             • EXIT INTERFACE IS A MULTI ACCESS ETHERNET
         • STARDARD NEXT-HOP
           • IPV4 - EXAMPLE
             • R1(CONFIG)# IP ROUTE 172.16.1.0 255.255.255.0 172.16.2.2
           • IPV6 - EXAMPLE
             • R1(CONFIG)# IPV6 ROUTER 2001:DB8:ACAD:1::/64 2001:DB8:ACAD:2::2
           • ONLY THE NEXT-HOP IP IS SPECIFIED
           • GENERALLY RECOMMENDED THAT WHEN EIT INTERFACE IS ETHERNET
             • INCLUDES A NEXT HOP ADDRESS
     • CAN BE CONFIGURE A DEFAULT STATIC TO ISP AND ADVERTISE THIS ROUTER TO OTEHR CORPORATE ROUTERS
     • VERIFY A STATIC ROUTE
       • R1#SHOW IP ROUTE STATIC
       • R1#SHOW IP ROUTE NETWORK
       • R1#SHOW RUNNING | SECTION IP ROUTE
       • REPLACE IP WITH IPV6 FOR IPV6
       • R1#SHOW IP ROUTER | BEGIN GATEWAY