highFix proposedMerakiDHCP / DNS

DNS resolution failures on HQ - Floor 2

Clients on HQ - Floor 2 cannot resolve hostnames.

HQ - Floor 2 · 5/29/2026, 8:56:44 PM

Root-cause analysis

Diagnosed cause

DNS resolver unreachable or misconfigured

RCA confidence74%

Above the 70% threshold — a fix can be pre-formed.

Reasoning

DNS lookups are failing without a matching DHCP problem, isolating the fault to name resolution rather than addressing.

Generated by heuristic

Evidence trail

dns_resolution_failuresFailed DNS lookups (5 min): 320

Failed lookups with no DHCP-side failures point at the resolver.

Normalized telemetry (1)

Failed DNS lookups (5 min)320

Proposed fix

Expand DHCP scope and correct DNS

Widen the DHCP lease range on the affected VLAN to relieve pool exhaustion and reset the configured DNS servers to the network default, then verify lease issuance.

risk: mediummeraki.dhcp.expand_pool_and_fix_dns

Exact calls that will run

1. Expand DHCP lease range on the appliance VLAN for network N_hq

PUT /networks/N_hq/appliance/vlans/{vlanId}

2. Reset DNS nameservers to the upstream resolver default

PUT /networks/N_hq/appliance/vlans/{vlanId}

Approving is disabled in the read-only demo.