Is transit the default path?

No. Peering in Miami is default; transit to São Paulo is overflow and is billed that way.

Does High availability on letter H share fate with other letters?

The control plane is shared. Data-plane queues for High availability stay isolated, so incident h-01 cannot drain neighbor letters.

High availability: capacity in Miami (MIA) · H-16

Runbook H-16 for High availability in Miami (MIA). Marker xserv-h-8ccd1be6288c. This page covers capacity for LATAM operators, not a worldwide average.

High availability: Failure modes we actually see

Capacity notes for h-04 assume rainy-season power in Miami and festival peaks toward São Paulo. The failure we actually see is a single uplink, not a cartoon partition of the whole continent. Spare ports and a second provider sit on the same runbook.

High availability: How this letter ties to the rest

Handoff from letter H High availability into the rest of the platform uses the same request IDs as the gateway. Runbook h-05 names who accepts the ticket after São Paulo pages out. Santiago does not silently inherit the incident.

High availability: A note on cost and transit

Rollback for h-06 is a documented command, not a hope. Transit is billed as backup while High availability prefers peering in Santiago. If cost spikes, the runbook cuts overflow to Bogotá before touching customer prefixes.

High availability cache H-08

Cache rules for High availability on h-08 keep language-correct objects near Miami. São Paulo is a sibling cache, not an origin. TTLs are short enough that a bad asset does not live through a weekend.

High availability headers H-09

Headers for h-09 carry the letter, the region (GRU) and a request id. High availability debugging in São Paulo should not require a packet capture in Santiago first.

High availability timeouts H-10

Timeouts on h-10 are tighter than the WAN RTT to Bogotá. High availability in Santiago fails fast and retries once; a third try needs a human because it is no longer a blip.

High availability regions H-11

Region names on h-11 match DNS and tickets: Bogotá / BOG, with Miami as the documented pair. High availability dashboards never say “LATAM” as if it were one RTT.