Command
Clear IP Route *
Use
Clears the routing table.
Syntax
Route#clear ip route *
Example
For this example, the routing table is cleared on R2. Here is the routing table before clearing it.
R2(config-router)#do show ip route rip 1.0.0.0/32 is subnetted, 3 subnets R 1.1.1.1 [120/1] via 10.1.1.1, 00:00:22, FastEthernet0/0 R 1.3.3.3 [120/1] via 10.1.1.1, 00:00:22, FastEthernet0/0 R 1.2.2.2 [120/1] via 10.1.1.1, 00:00:22, FastEthernet0/0 192.168.13.0/30 is subnetted, 1 subnets R 192.168.13.0 [120/1] via 10.2.2.3, 00:00:23, FastEthernet1/0 [120/1] via 10.1.1.1, 00:00:22, FastEthernet0/0 33.0.0.0/32 is subnetted, 1 subnets R 33.33.33.33 [120/1] via 10.2.2.3, 00:00:23, FastEthernet1/0 3.0.0.0/32 is subnetted, 1 subnets R 3.3.3.3 [120/1] via 10.2.2.3, 00:00:23, FastEthernet1/0 111.0.0.0/32 is subnetted, 1 subnets R 111.111.111.111 [120/1] via 10.1.1.1, 00:00:22, FastEthernet0/0 10.0.0.0/24 is subnetted, 3 subnets R 10.4.4.0 [120/1] via 10.2.2.3, 00:00:23, FastEthernet1/0 [120/1] via 10.1.1.1, 00:00:22, FastEthernet0/0 11.0.0.0/32 is subnetted, 1 subnets R 11.11.11.11 [120/1] via 10.1.1.1, 00:00:22, FastEthernet0/0 133.133.0.0/32 is subnetted, 1 subnets R 133.133.133.133 [120/1] via 10.2.2.3, 00:00:23, FastEthernet1/0
Next, the routing table is cleared.
R2(config-router)#do clear ip route *
After clearing the table, show ip route rip is executed and returns nothing.
R2(config-router)#do show ip route ripR2(config-router)#
Shortly after, the routing table refreshes.
R2(config-router)#do show ip route rip 1.0.0.0/32 is subnetted, 3 subnets R 1.1.1.1 [120/1] via 10.1.1.1, 00:00:00, FastEthernet0/0 R 1.3.3.3 [120/1] via 10.1.1.1, 00:00:00, FastEthernet0/0 R 1.2.2.2 [120/1] via 10.1.1.1, 00:00:00, FastEthernet0/0 192.168.13.0/30 is subnetted, 1 subnets R 192.168.13.0 [120/1] via 10.2.2.3, 00:00:00, FastEthernet1/0 [120/1] via 10.1.1.1, 00:00:00, FastEthernet0/0 33.0.0.0/32 is subnetted, 1 subnets R 33.33.33.33 [120/1] via 10.2.2.3, 00:00:00, FastEthernet1/0 3.0.0.0/32 is subnetted, 1 subnets R 3.3.3.3 [120/1] via 10.2.2.3, 00:00:00, FastEthernet1/0 111.0.0.0/32 is subnetted, 1 subnets R 111.111.111.111 [120/1] via 10.1.1.1, 00:00:00, FastEthernet0/0 10.0.0.0/24 is subnetted, 3 subnets R 10.4.4.0 [120/1] via 10.2.2.3, 00:00:00, FastEthernet1/0 [120/1] via 10.1.1.1, 00:00:00, FastEthernet0/0 11.0.0.0/32 is subnetted, 1 subnets R 11.11.11.11 [120/1] via 10.1.1.1, 00:00:00, FastEthernet0/0 133.133.0.0/32 is subnetted, 1 subnets R 133.133.133.133 [120/1] via 10.2.2.3, 00:00:00, FastEthernet1/0