Cisco CCNA Exam Tutorial And Case Study: VLANs and IP Connectivity
In this CCNA case study, we’ll take some basic switching and trunking theory and put it into action. We have two routers (R2 and R3) along with two switches (SW1 and SW2). R2 is connected to SW1 at fast 0/2, and R3 is connected to SW2 at fast 0/3. Both routers have IP addresses on the 172.12.23.0 /24 network.
For these routers to be able to ping each other, the switches must be able to communicate. These are two 2950 switches, and they’re connected via two crossover cables. Before we worry about the router connectivity, let’s make sure the trunk link is up between the switches with the “show interface trunk” command.
SW2#show interface trunk
Port Mode Encapsulation Status Native vlan
Fa0/11 desirable 802.1q trunking 1
Fa0/12 desirable 802.1q trunking 1
< output truncated for clarity >
The default mode of these switches is for the ports to run in dynamic desirable trunking mode, so we didn’t even need to write a configuration to...
To view and download this full PLR article, you must be logged in. Registration is completely free. Once you create your account, you will be able to browse, search & downlod from our PLR articles database of over "1,57,897+" on 1,000's of niches and 200+ categories without paying a penny. Click here to signup...
