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Add the running configs of your Cisco switches, with their CDP or LLDP neighbours if you have them. You get the network diagram, every VLAN and where it reaches, a port map for each switch, and the mistakes only a whole-network view shows: links that disagree at the two ends, and VLANs that never reach their gateway. Read in your browser.
Network map1 Summary
2 The diagram
LinkDiffers at the two endsBroken or mismatchedFrom a description onlyNot supplied
3 The checks
4 VLANs
5 Switches and ports
6 What this could not check
Drawn from: . Read in your browser; nothing was sent to us. Guidance, not an audit; see the terms.
Two read-only commands per switch. The configs give the VLANs and ports; the neighbour output gives the cables between switches.
terminal length 0.show running-config and show cdp neighbors detail. The prompts in the log tell this tool which switch is which.show lldp neighbors detail on Cisco switches. Other vendors’ switches appear as neighbours, drawn dashed.lldp run on Cisco IOS; it is often off by default.What happens to it: it is read in your browser and kept in this page’s memory only until you close it or start again, so you can add more switches. Passwords, secrets and keys are never read. Nothing is uploaded, and our copy of your details carries only the counts.
The questions people search for before they run the check.
Collect show running-config and show cdp neighbors detail (or show lldp neighbors detail) from each switch, and drop the files in above. The switches, the cables between them, the VLANs and every port are read from the text and drawn, in your browser.
The native VLAN carries untagged traffic on a trunk. If the two ends of a trunk use different native VLANs, untagged traffic leaves one switch in one VLAN and arrives in another, joining them; switches log it as a CDP native VLAN mismatch. Set the same native VLAN at both ends.
Usually because a trunk somewhere between the access switch and the switch or router holding the gateway does not allow that VLAN. This tool follows each VLAN trunk by trunk and names the switch where it stops.
It gives the most accurate map, because it records which port connects to which. Without it, links are found from port descriptions that name another switch, and drawn dotted.
No. They are read in your browser and kept in the page's memory only until you close it or start again. Passwords and keys are never read. If you ask for the report, we keep your details and a one-line summary with the counts.
Most networks are documented in one engineer’s head. A map from the configs themselves is accurate today; keeping it current is what makes the next change safe.