Enterprise Network Troubleshooting Walkthrough | EIGRP, DHCP, DNS, ACL (Packet Tracer Lab)
This video demonstrates a structured troubleshooting walkthrough of a multi-site enterprise network built in Cisco Packet Tracer.
The network includes:
Hub-and-spoke WAN topology
EIGRP dynamic routing
VLAN segmentation with router-on-a-stick
Centralized DHCP and DNS services
Issues identified and resolved:
Missing EIGRP route advertisement
DHCP relay misconfiguration
ACL blocking DNS traffic
This lab showcases layered troubleshooting across routing, infrastructure services, and network security.
Tools: Cisco Packet Tracer
Focus: Network Troubleshooting, Routing & Switching, Infrastructure Services
https://github.com/jslee-it/network-p...
/ jslee0290
0:00 Incident Context
0:16 Network Overview
1:02 Reproduce Initial Symptom
2:10 Routing Investigation
2:31 Identify Missing Route
2:52 Fix EIGRP Advertisement
4:35 DHCP Failure Investigation
4:45 Investigate DHCP Relay
5:52 Fix DHCP Relay
6:20 Validate DHCP Lease
6:50 Validate Infrastructure Services
7:48 Reproduce DNS Failure
8:21 Operational Insight
8:45 Investigate WAN Security Policy
9:31 Fix ACL Policy
9:53 DNS Validation
10:13 Final Validation
10:48 Resolution Summary