Hotel case study - HSRP Configuration

Explanation Although we have redundant distribution layer devices, our PCs do not have the ability to support multiple gateways. That forces us to configure a single gateway address on the PC and in the even that gateway fails, the PC will lose connectivity.

The solution is to configure the two distribution layer routers for HSRP (Hot Standby Routing Protocol). HSRP creates a virtual router whose functionality is provided bythe physical routers. If a physical router fails, the standby router will take its place in providing the services of the virtual router. As the virtual router has a consistent IP and MAC address, any change in the availability of the physical routers is invisible to the PC.

It is important to understand that the HSRP region extends between the distribution layer devices and the host PC. All of these devices will be in the same subnet and VLAN. The distribution layer devices perform interVLAN routing and so the router interfaces are VLAN interhaces (not physical port numbers). When you configure HSRP you must apply it to the VLAN interfaces on the distribution layer device. This is a subtle but important difference between the lab (where we used physical routers) and the case study where we are using layer 3 switches with SVI (Switch Virtual Interfaces).

Routing Requirements

You must provide intervlan routing, such that all devices can ping one another.

   Configure intervlan routing on all DL switches.
       Users on level one should make use of DL1 as their default gateway.
       Users on level two should make use of DL2 as their default gateway.
       Use HSRP with the active router for each guest floor being on a different router.

What you need to do?

How you will know it is configured correctly?

What questions could I see on the practical exam?