IP Static Routing

IP Static Routing

1. Static Routes

   • Types of Static Routes
     • Standard Default Floating Summary
   • Next-Hop Options
     • --Next-hop route --Directly connected static route --Fully specified static route
   • IPv4 Static Route Command
     • Router(config)# ip route network-address subnet-mask { ip-address | exit-intf [ip-address]} [distance]
   • IPv6 Static Route Command
     • Router(config)# ipv6 route ipv6-prefix/prefix-length {ipv6-address | exit-intf [ipv6-address]} [distance]

2. Configure IP Static Routes

   • IPv4 Next-Hop Static Route
     • In a next-hop static route, only the next-hop IP address is specified.
   • IPv6 Next-Hop Static Route
   • IPv4 Directly Connected Static Route
     • When configuring a static route, another option is to use the exit interface to specify the next-hop address.
   • IPv6 Directly Connected Static Route
   • IPv4/IPv6 Fully Specified Static Route
     • In a fully specified static route, both the exit interface and the next-hop IP address are specified.
   • Verify a Static Route
     • --show ip route static --show ip route network --show running-config | section ip route

3. Configure IP Default Static Routes

   • Default Static Route
     • IPv4 Default Static Route
       • Router(config)# ip route 0.0.0.0 0.0.0.0 {ip-address | exit-intf}
     • IPv6 Default Static Route
       • Router(config)# ipv6 route ::/0 {ipv6-address | exit-intf}
   • Verify a Default Static Route
     • show ip route static show ip route
     • show ipv6 route static

4. Configure Floating Static Routes

   • Configure IPv4 and IPv6 Floating Static Routes
     • IP floating static routes are configured by using the distance argument to specify an administrative distance. If no administrative distance is configured, the default value (1) is used.
   • Floating Static Routes
     • Floating static routes are static routes that are used to provide a backup path to a primary static or dynamic route, in the event of a link failure.

5. Configure Static Host Routes

   • Host Routes
     • A host route is an IPv4 address with a 32-bit mask, or an IPv6 address with a 128-bit mask. The following shows the three ways a host route can be added to the routing table:
       • Automatically
       • Configured as a static host route
       • Host route automatically obtained through other methods
   • Automatically Installed Host Routes
     • Cisco IOS automatically installs a host route, also known as a local host route, when an interface address is configured on the router.
   • Static Host Routes
     • A host route can be a manually configured static route to direct traffic to a specific destination device
   • Configure IPv6 Static Host Route with Link-Local Next-Hop
     • For IPv6 static routes, the next-hop address can be the link-local address of the adjacent router. However, you must specify an interface type and an interface number when using a link-local address as the next hop