r/packettracer

Built my biggest Cisco Packet Tracer project so far — a dual-site enterprise WAN topology connecting a simulated US headquarters to a Philippines branch office.

Technologies/features implemented:
- BGP with simulated ISP/IXP ASNs
- GRE tunnel to overcome double NAT issues
- OSPF, static routing, NAT/PAT
- HSRP v2, EtherChannel, Rapid-PVST
- DHCP Snooping, DAI, Port Security
- Voice VLANs + wireless deployment
- Syslog, NTP, DNS services

One of the hardest parts was troubleshooting inter-site communication through double NAT and working around Packet Tracer limitations.

This project pushed me far beyond standard CCNA labs and gave me a much better understanding of WAN architecture and enterprise troubleshooting.

I’m still trying to break into IT/networking, so I’d genuinely appreciate any feedback or suggestions from more experienced engineers.

Disclaimer:
This is a fictional educational topology created for learning purposes only. ISP/provider names are used strictly for simulation realism and are not affiliated with or representative of actual network infrastructures. Public IP ranges follow RFC 5737 and RFC 6598 documentation standards.

Topology + configs:

https://github.com/chaardd127/Enterprise-WAN-Topology-US-to-Philippines

I simulated a basic enterprise connection between two sites.
1 Site with one switch for demonstration of Single Point of Failure

and site 2 with 2 switches and additional server for DNS.
The whole point of the exercise is to simulate a controlled environment for multiple concepts.
Learnt to configure DHCP
Routing and Debugging the routing table
NAT
Routing between switch<->Router<->Firewall<->Endhosts.

Only things I need to learn more are VPN Tunnelling to connect the two seperate subnets, then i will also learn OSPF, VLans. There's just so much to learn. And I couldn't be more excited.

First of all sorry for the image's quality. I've tried to search for an answer but can't find a definitive one. Is it good practices to register every VLAN in every switch? I did it in both left switches, but my teacher says I shouldn't (he's not a reliable source since he uses chatgpt for everything that he has to teach us). So what do you think? I've seen something about VTP but I don't know what that is yet.