Jeremy's IT Lab - CCNA Lecture

Introduction

• Welcome to Jeremy’s IT Lab
• Free, complete course for CCNA
• Encouragement to subscribe, like, comment, and share
• Sign up via link for lab files to use in Packet Tracer
• Recommendation for Boson’s NetSim for CCNA
  • Network simulator
  • Guided labs included
  • Helps with hands-on practice and understanding exam topics
  • Personal recommendation by Jeremy
  • Link provided in video description

Lab Overview

• Basic OSPF configurations in a small network
• Comparison to Day 25's EIGRP configuration lab
• Steps 2 and 3: focus on configuring loopback interfaces and OSPF
• Pre-configured Step 1 (hostnames and IP addresses) off-camera

Configuring Loopback and OSPF (Example: R4)

Steps on R4:

1. Enter privileged exec mode: ENABLE
2. Enter global configuration mode: CONF T
3. Configure loopback interface: INTERFACE L0
4. Assign IP address to loopback: IP ADDRESS 4.4.4.4 255.255.255.255
5. Verify interface creation: DO SHOW IP INTERFACE BRIEF and DO SHOW INTERFACE L0

Configure OSPF on R4:

1. Enter OSPF configuration: ROUTER OSPF 4
2. Enable OSPF on all interfaces: NETWORK 0.0.0.0 255.255.255.255 AREA 0
3. Configure passive interfaces: PASSIVE-INTERFACE G0/0 and PASSIVE-INTERFACE L0

Configurations on Other Routers

R3:

1. Enable mode and global config: ENABLE and CONF T
2. Configure loopback: INTERFACE L0 and IP ADDRESS 3.3.3.3 255.255.255.255
3. Configure OSPF with process ID 3
4. Enable OSPF on specific interfaces:
   • NETWORK 10.0.13.2 0.0.0.0 AREA 0
   • NETWORK 10.0.34.1 0.0.0.0 AREA 0
   • NETWORK 3.3.3.3 0.0.0.0 AREA 0
5. Configure passive interface: PASSIVE-INTERFACE L0

R2:

1. Enable mode and global config: ENABLE and CONF T
2. Configure loopback: INTERFACE L0 and IP ADDRESS 2.2.2.2 255.255.255.255
3. Configure OSPF with process ID 2
4. Enable OSPF on interfaces with a single command: NETWORK 10.0.0.0 0.0.255.255 AREA 0
5. Configure loopback: NETWORK 2.2.2.2 0.0.0.0 AREA 0
6. Configure passive interface: PASSIVE-INTERFACE L0

R1:

1. Enable mode and global config: ENABLE and CONF T
2. Configure loopback: INTERFACE L0 and IP ADDRESS 1.1.1.1 255.255.255.255
3. Configure OSPF with process ID 1
4. Enable OSPF on specific interfaces:
   • NETWORK 10.0.12.0 0.0.0.3 AREA 0
   • NETWORK 10.0.13.0 0.0.0.3 AREA 0
   • NETWORK 1.1.1.1 0.0.0.0 AREA 0
5. Configure passive interface: PASSIVE-INTERFACE L0

Advertising Default Route (R1)

1. Advertise default route: DEFAULT-INFORMATION ORIGINATE
2. Configure default route: IP ROUTE 0.0.0.0 0.0.0.0 203.0.113.2
3. Verify configuration: SHOW IP PROTOCOLS

OSPF Show Commands (R1)

1. View LSDB: SHOW IP OSPF DATABASE
2. View OSPF neighbors: SHOW IP OSPF NEIGHBOR
3. View OSPF interface details: SHOW IP OSPF INTERFACE

Verifying Routing Tables

• Default routes in routing tables of R2, R3, and R4
• Load balancing in R4: Both paths added

Additional Lab Preview (Boson NetSim)

Lab Setup:

1. Verify initial configurations (IP addresses, interface state)
2. Ping tests for connectivity
3. Plan for OSPF: Use Area 0 and specific network commands
4. Configure and verify OSPF in NetSim

Closing

• Acknowledgement of JCNP-level members
• Encouragement to subscribe, like, and share
• Links for tips and Brave browser tips