A housing authority dual-homes a staff VLAN behind two first-hop routers and must keep DHCP, time sync, and gateway failover coordinated during maintenance. Which integration best supports clean failover?
Select an answer to reveal the explanation.
Short Explanation
Failover is a three-legged stool: gateway (FHRP), addresses (DHCP), and clocks (NTP). If one leg is glued to the router you are about to shut down, tenants fall over. Design so relays, time sources, and HSRP/VRRP tracking move with the surviving path.
Full Explanation
Dual-homed VLAN maintenance succeeds when first-hop redundancy, DHCP reachability, and time services remain available after the planned outage. FHRP priorities and interface/object tracking should elect the surviving gateway; DHCP relays or anycast/secondary servers must still reach clients; NTP should not depend solely on the device being drained. Pinning critical services only to the standby-less path or disabling FHRP creates asymmetric failure. Coordinate interdependent network services—not just the VIP—during HA windows.