Now we will do Lab for Tracking
In here we have as follow
Above we have a router (R1) that is connected to two ISPs. We want to use ISP1 as the primary and ISP2 as the backup link. All traffic will be sent towards ISP1 but when it’s unreachable we’ll switch over to ISP2. You can achieve this by using two default routes:
R1=f0/0 192.168.12.1 /24 connected to ISP1=192.168.12.2
R1=F0/1 192.168.13.1 /24 connected to ISP2= 192.168.13.3
R1#show ip int brief
| Interface | IP-Address | OK? | Method | Status | Protocol |
| FastEthernet0/0 | 192.168.12.1 | YES | manua | up | up |
| FastEthernet1/0 | 192.168.13.1 | YES | manual | up | up |
| Serial0/1/0 | unassigned | YES | unset administratively | up | up |
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