Make cisco packet tracer according to the previous table

Task Two: Routing the Network

Routing to and from ISP

The AIT network has purchased two ISP links to access the Internet and external services, i$.$e$.,$ via

the Main and Branch respectively. AIT$$s policy requires that the backup ISP link via Branch is only

used when the primary Main$-$ISP link becomes unavailable.

Since the ISP also serves many other customers, routing to and from ISP will use static routing only,

and a standard static route should be used on ISP to forward traffic to the AIT internal network

only when needed.

When correctly implemented, all hosts within the AIT network must be able to reach all external

addresses, via the Main$-$ISP link, or the Branch$-$ISP link when the Main$-$ISP link is unavailable, in

both directions.

Note that, for the demonstration purpose, use a loopback interface with the address of $1\mathrm{.}1\mathrm{.}1\mathrm{.}1/32,$

on ISP to simulate the Internet. Also, NAT at both border routers will be considered in Task Four.

Routing the Internal Network

$$ AIT$$s policy is that OSPFv$2$ routing will be used internally.

Your design and implementation of static routing should be in a most efficient manner.

Fig. $3.$ Routing the network dynamically and statically

Discussion Questions:

Consider how you implement and verify the following functions:

$1)$ OSPF routing for the internal networks.

$2)$ Static routing and failover routing via the two ISP links.