Advanced OSPF & Network Access Control: Multi-Area Design + Named ACLs

Course Summary

Topics We Will Be Covering in the WORKSHOP:

Please NOTE that once you enroll in the workshop, you will receive an automatic email with the link to register for the LIVE ZOOM!

            Multi-Area OSPF Deep Dive

🔸 – Introduction & Workshop Objectives
•Brief overview of OSPF
•What you’ll walk away with: real-world skills for scalable routing and secure network design

🔸 – Multi-Area OSPF Theory 
•Why use multiple OSPF areas?
•Area 0 (Backbone) and other areas – types and purposes.
•OSPF LSA types in multi-area setups
•Router types: ABR, ASBR, Internal, Backbone

🔸 – Configuration Lab (Live Walkthrough or Packet Tracer/GNS3/EVENG) 
•Setup of 3 routers in at least 2 areas (Area 0 and Area 1)
•Assigning interfaces to OSPF areas
•Verifying LSDBs and routes
•Commands: "router ospf, network, area, show ip ospf, show ip route, debug ip ospf"

🔸 – Route Summarization & LSA Behavior
•Manual summarization at ABRs
•Impact on routing tables
•LSA propagation and filtering concepts

🔸 – Troubleshooting Multi-Area OSPF 
•Common mistakes (missing area 0, misconfigured interfaces).
•Hands-on CLI troubleshooting
•Useful commands: "show ip ospf neighbor, show ip ospf interface, debug ip ospf events"

Named ACLs for Secure Network Access

🔸 – ACL Theory Refresher 
•What are Access Control Lists (ACLs)?
•Standard vs Extended vs Named ACLs
•Use cases in secure network design (user segmentation, access control to devices/services)

🔸– Named ACL Syntax & Configuration 
•Named ACL advantages
•Creating Named ACLs: ip access-list standard | extended NAME
•Applying ACLs to interfaces (inbound vs outbound)
•Permit vs deny logic. ip access-list extended SECURE-IN  permit tcp 10.10.10.0 0.0.0.255 any eq 80  deny ip any any
•Apply with: interface g0/1, ip access-group SECURE-IN in

🔸 – Lab: Applying Named ACLs 
•Scenario: Only specific subnets or hosts can access a server
•Block all other traffic
•Test connectivity before and after

🔸 – Combining OSPF and ACL Concepts 
•Lab: Secure access to an OSPF-enabled router.
•Use ACL to prevent telnet or SSH access from unauthorized subnets
•Apply filtering to limit routing advertisements if applicable (advanced)
•Q&A
•Key takeaways
•Share a downloadable lab topology + configs

Want me to draft the lab topology and configs too? I got you! 

This is a 3-Hour Workshop
This is a hands-on workshop and we will cover all of the above -
 ... & much more!