VLANDiff

VLANDiff is a web app (with an optional lightweight desktop agent) that continuously compares intended VLAN configuration against what’s actually deployed across switches. It pulls configs via SSH/API, normalizes vendor-specific syntax (Cisco, Aruba, Juniper, etc.), and highlights drift: missing VLANs, mismatched trunk allowed lists, native VLAN inconsistencies, and access ports in the wrong VLAN. Instead of being a full-blown network management platform, it focuses narrowly on VLAN correctness and change accountability. You can define “golden” VLAN policies per site or switch role, then get actionable diffs and a one-click export of remediation commands (not auto-push by default, because that’s risky and many orgs won’t allow it). It also keeps an audit trail that maps drift to change windows and tickets, making post-incident root cause faster and less political.