MS Visio Look a Like Diagrams

No need for any special drawing skills to create professional looking diagrams outside of your knowledge base. ConceptDraw DIAGRAM takes care of the technical details, allowing you to focus on your job, not the drawing.
ConceptDraw DIAGRAM delivers full-functioned alternative to MS Visio. ConceptDraw DIAGRAM supports import of Visio files. ConceptDraw DIAGRAM supports flowcharting, swimlane, orgchart, project chart, mind map, decision tree, cause and effect, charts and graphs, and many other diagram types.

Cisco Network Templates

Cisco has a huge number of enterprise clients in the corporate environment. Therefore many network engineers should draw network diagrams for Cisco hardware.
ConceptDraw has Cisco network diagram templates:

Wireless Mesh Network, Network Organization Chart, Roaming Wireless Local Area Network, Cisco ISG Topology Diagram, Cisco Express Forwarding Sample that facilitates drawing at the initial stage.

However for customizing Cisco network diagrams you can use 13 Libraries like this: Cisco Basic, Cisco Buildings, Cisco IBM, Cisco LAN, Cisco WAN, Cisco Media, Cisco Optical, Cisco People, Cisco Routers, Cisco Security, Cisco Switches&Hub, Cisco Telepresences, etc.

This take great advantage to you for designing Cisco network diagram templates.