The topology drawing became an unreadable strip at a few hundred machines and dozens of VLANs. The page now starts with what needs attention (offline rack controllers and the VLANs they leave without DHCP/PXE, provisioning VLANs without it, nearly full subnets, IPAM errors), has filters by fabric, purpose and rack controller and a search that shows a machine's path to the region, and a VLAN x rack controller matrix that is the default once a site is large. The topology groups machines by rack and VLAN, then by rack, when boxes would not fit, and scrolls instead of shrinking; the overview shows one row per fabric on a large site. Filters can come from the URL. Checked with a synthetic site (3 fabrics, 9 rack controllers, 43 subnets, 360 machines) and the lab in headless Chrome. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>