Static Routes

• Static routes are manually configuring IP routes entered into a Layer 3 device's Routing Table.
• A Floating Static Route is a manually-configured backup route to another identical route with an AD or one or more than the preferred route
  • e.g., a floating static route of an EIGRP dynamic route might have an AD set between91 and 99
  • A FSR won't appear in the routing table (unless the preferred route fails), but will be shown in the running config

IPv6 Routes

• There are three kinds of IPv6 routes
  • Directly Attached
    • Only points to the exit interface
  • Recursive
    • Only points to the next-hop address
    • Called recursive because it has to check the routing table twice
      • first to match the destination IP against a route
      • second to match the next-hop address against a route
  • Fully Specified
    • Identifies both the exit interface and the next-hop address

Configure a static route

• IPv4
  • config# ip route <destination address> <netmask> <next-hop add. or local interface> <ad>
    • Destination address
      • Network address of the target network
    • Netmask
      • subnet mask of the target destination written in dotted-decimal
    • Next-hop Address or Local interface
      • Either the IP address of the directly-connected neighbor interface, or the local interface you want to send traffic out of
    • AD (Administrative Distance)
      • Default is 1, but can be manually set
      • To configure a Floating Static Route, assign an AD of 1 or more than the
• IPv6
  • config# ip route <destination address and netmask> <next-hop add. and/or local interface> <ad>
    • Destination address and netmask
      • The target network address with it's slash-notation subnet mask
        • e.g., 2001:db8::1/64
    • Next-hop address and/or Local interface
      • There are three possible configurations:
        • Directly Connected
          • Only the local interface is listed
        • Recursive
          • Only the neighbor IP address is listed
          • Called "Recursive" because it has to check the routing table twice
            • It has to check the routing table twice; first to see where to send the packet, next to see which interface is connected to the neighbor IP
        • Fully Specified
          • Identifies both the local interface and the neighbor IP
    • AD (Administrative Distance)
      • Default is 1, but can be manually set
      • To configure a Floating Static Route, assign an AD of 1 or more than the

Metadata

OSI or TCP/IP Layer

CCNA Exam Topic

#extop-3-3

Contributors

Sources