Logical network diagrams focus on how traffic flows within the network, the logical connections between devices, subnets, and networks, and the data flow. When creating logical diagrams, you should include:
1. Subnets:Represent different segments of your network, such as departments or layers.
2. Network Devices and their Logical Connections: This includes routers, switches, firewalls, and other main devices, but not necessarily every individual device like in a physical diagram.
3. IP Addresses: Especially for critical devices or network segments.
4. VLAN IDs: If your network uses VLANs.
5. Routing Protocols: Such as OSPF, EIGRP, BGP, etc.
6. Redundancy: Logical paths for failover or load balancing.
7. VPN Tunnels: If you have remote connections.
8. Network Services: Such as DHCP, DNS, etc.
9. Data Flow: Arrows or lines indicating the direction of data traffic.
10. WAN Connections: Including details about the type of connection (MPLS, leased line, etc.) and the bandwidth.