host_vars: DATA VLAN 30 (ether1 uplink + ether2-7 + sfp1/2), isolated MGMT VLAN 99
on ether8, mgmt 192.168.88.1/24, no gateway, NTP disabled. Role: switch_ntp_enabled
flag (enable/disable NTP), conditional default route (skip when no gateway), and a
guarded removal of the legacy defconf bridge IP so the mgmt IP lives only on vlan-mgmt.
Membership Jinja re-validated; lint+syntax clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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