Choosing Between Three Routes to Same Subnet
Today’s question focuses on one router that has three different available routes to the same subnet (10.1.2.0/24). Which should it choose? Details below, and answer in a few days.
R1 happens to run RIP-2 over the link to R2, OSPF over the link to R3, and EIGRP over the link to R4. All three of the routers on the right advertise a route for 10.1.2.0/24. R1’s metric for the RIP-2 route is 1; with OSPF the metric is 65; and for EIGRP, the metric is 2,168,134.
The first question: Which router will R1 choose? And Why?
Next, R1 is configured with a static IP route for 10.1.2.0/24, with the next-hop router configured as R2, R3, or R4. Which one? Pick whichever router you didn’t pick as the answer to the first question. Which route, and which next-hop router, does R1 use now for packets destined for 10.1.2.0/24?