Free CCNA | Subnetting (VLSM) | Day 15 Lab | CCNA 200-301 Complete Course
Welcome to Jeremy’s IT Lab
This section introduces the course and encourages viewers to subscribe and engage with the content. The practice lab is also mentioned.
Introduction and Lab Overview
- Jeremy's IT Lab offers a free, complete course for the CCNA certification.
- Viewers are encouraged to subscribe, like, comment, and share the videos.
- A practice lab is available for download from the link in the video description.
Subnetting using VLSM
This section focuses on subnetting using Variable Length Subnet Masks (VLSM) and recommends completing a specific lab before watching the video.
Subnetting with VLSM
- The lab requires subnetting a class C network into 5 subnets of different sizes.
- It is recommended to attempt the lab before watching this video.
- The goal is to assign subnets in a specific order: LAN2, LAN1, LAN3, LAN4, and point-to-point link.
- First usable address should be assigned to PCs in each LAN, while last usable address goes to routers.
- Static routes need to be configured for inter-LAN communication.
LAN2 Subnet Configuration
This section covers the configuration of LAN2 subnet.
Configuring LAN2
- For LAN2, a /25 prefix length is required as it allows for 126 hosts.
- Network address: 192.168.5.0
- Broadcast address: 192.168.5.127
Router Configuration (R1)
- Enter privileged exec mode with
ENABLE.
- Enter global config mode with
CONFIGURE TERMINAL.
- Configure R1's Gigabitethernet0/1 interface using
INTERFACE G0/1.
- Set R1's IP address as the last usable address: 192.168.5.126 with a subnet mask of 255.255.255.128.
- Enable the interface with
NO SHUTDOWN.
- Confirm the configuration using
DO SHOW IP INTERFACE G0/1.
PC Configuration (PC2)
- Set the default gateway to R1: 192.168.5.126.
- Configure fastethernet0 with an IP address of 192.168.5.1 and a subnet mask of 255.255.255.128.
LAN1 Subnet Configuration
This section covers the configuration of LAN1 subnet.
Configuring LAN1
- For LAN1, a /26 prefix length is required as it allows for 62 hosts.
- Network address: 192.168.5.128/26
- Broadcast address: 192.168.5.191
Router Configuration (R1)
- Configure R1's G0/0 interface using
INTERFACE G0/0.
- Set R1's IP address as the last usable address: 192.168.5..190 with a subnet mask of 255..255..255..192.
- Enable the interface with
NO SHUTDOWN.
- Confirm the configuration using
DO SHOW IP INTERFACE G0/0.
PC Configuration (PC1)
- Set the default gateway to R1: 192..168..5..190.
- Configure fastethernet0 with an IP address of 192..168..5..129 and a subnet mask of /26.
LAN3 Subnet Configuration
This section covers the configuration of LAN3 subnet.
Configuring LAN3
- For LAN3, a /28 prefix length is required as it allows for 14 hosts.
- Network address: To be determined.
Router Configuration (R1)
- Configure R1's G0/2 interface using
INTERFACE G0/2.
- Set R1's IP address as the last usable address: To be determined.
- Enable the interface with
NO SHUTDOWN.
PC Configuration (PC3)
- Set the default gateway to R1: To be determined.
- Configure fastethernet0 with an IP address of To be determined and a subnet mask of /28.
LAN4 Subnet Configuration
This section covers the configuration of LAN4 subnet.
Configuring LAN4
- For LAN4, a /29 prefix length is required as it allows for 6 hosts.
- Network address: To be determined.
Router Configuration (R2)
- Configure R2's G0/0 interface using
INTERFACE G0/0.
- Set R2's IP address as the last usable address: To be determined.
- Enable the interface with
NO SHUTDOWN.
PC Configuration (PC4)
- Set the default gateway to R2: To be determined.
- Configure fastethernet0 with an IP address of To be determined and a subnet mask of /29.
New Section
Configuring LAN interfaces and IP addresses.
Configuring LAN3
- Enable the interface with
NO SHUTDOWN.
- Confirm the IP address using
DO SHOW IP INTERFACE g0/0.
- Configure PC3:
- Set the gateway address to 192.168.5.206.
- Set the IP address of fastethernet0 to 192.168.5.193.
- Change the last octet of the subnet mask to 240.
New Section
Configuring LAN4.
Configuring LAN4
- Use a /28 prefix length for LAN4.
- Network address: 192.168.5.208
- Broadcast address: 192.168.5.223
- Configure R2's G0/1 interface:
- Set the IP address to 192.168.5.222 with a subnet mask of 255.255.255.240.
- Enable the interface with
NO SHUTDOWN.
- Configure PC4:
- Set the gateway to R2's address, 192.168.5.222.
- Set the IP address of fastethernet0 to the first usable address, which is 192.168.5.209.
New Section
Configuring point-to-point connection between R1 and R2.
Configuring Point-to-point Connection
- Use a /30 prefix length for the point-to-point connection.
- Network address: 192.168..5..224
- Broadcast address: 192..168..5..227
- Configure R1's g0/0/0 interface:
- Set the IP address to first usable address, which is 192.168.5.225, with a subnet mask of 255.255.255.252.
- Enable the interface with
NO SHUTDOWN.
- Configure R2's g0/0/0 interface:
- Set the IP address to last usable address, which is 192.168.5.226, with a subnet mask of 255.255.255.252.
- Enable the interface with
NO SHUTDOWN.
New Section
Configuring static routes on each router.
Configuring Static Routes
- Each router has three connected networks: point-to-point link, LAN1 and LAN2 for R1 or LAN3 and LAN4 for R2.
- Configure two static routes for each router:
- For R2:
- Route to LAN1: IP ROUTE 192.168..5..128 255..255..255..192 next hop: 192..168..5..225
- Route to LAN2: IP ROUTE 192..168..5..0 255...255...255...128 next hop: 192...168...5...225
- Check the route table using
DO SHOW IP ROUTE.
New Section
Verifying connectivity and concluding the configuration.
Verifying Connectivity
- Configure routes on R1:
- Route to LAN3: IP ROUTE 192...168...5...192 255....255....255....240 next hop: 192.....168.....5.....226
- Route to LAN4: IP ROUTE 192.....168.....5.....208 255......255......25.......240 next hop: ....19........2......16
- Check the route table using
DO SHOW IP ROUTE.
- Test connectivity by pinging from PC1 to PC4.
New Section
Conclusion and closing remarks.
Conclusion
- Ping from PC1 to PC4 to test connectivity.
- Successful subnetting, configuration of network, and static routes.
- Thank you for watching. Please subscribe, like, comment, and share the video.