Floating Static Route

Floating Static Routes: -

·         A floating static route is a static route that uses to back up for a dynamic route.

·         You have to configure a floating static route with a higher administrative distance value than the dynamic route.

·         floating static route as a Backup route if the dynamic route is lost.

·         By default, a router use static route over a dynamic route because a static route has a smaller administrative distance than a dynamic route.

Take a Look of Bellow Floating Static Route Diagram: -

  

                                                Configure ip address as per this diagram: -

Configure Dynamic Routing Protocol & Static Routing also and use static route AD Higher then RIP.

R1(config)# router rip

R1(config-router) # network 10.0.0.0

R1(config-router) # network 20.0.0.0

R1(config)# ip route 30.0.0.0 255.0.0.0 f0/0 20.0.0.3 130

R2(config) # router rip

R2(config-router) # network 20.0.0.0

R2(config)# ip route 10.0.0.0 255.0.0.0 f0/0 20.0.0.1 130

R2(config)# ip route 30.0.0.0 255.0.0.0 f0/0 20.0.0.3 130

R3(config-router) # network 20.0.0.0

R3(config-router) # network 30.0.0.0

R3(config)# ip route 10.0.0.0 255.0.0.0 f0/1 20.0.0.1 140

Verify static floating routes:

RIP is working: -

R1#show ip route

C    20.0.0.0/8 is directly connected, FastEthernet0/0

C    10.0.0.0/8 is directly connected, FastEthernet0/1

R    30.0.0.0/8 [120/1] via 20.0.0.3, 00:00:18, FastEthernet0/0

30.0.0.0/8 route come throw RIP when RIP goes down then static route take place because we use static AD 130.

RIP goes down: -

R1#show ip route

C    20.0.0.0/8 is directly connected, FastEthernet0/0

C    10.0.0.0/8 is directly connected, FastEthernet0/1

S    30.0.0.0/8 [130/0] via 20.0.0.3, FastEthernet0/0

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