Is transit the default path?

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

Does Keys on letter K share fate with other letters?

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

Keys: docs in Miami (MIA) · K-48

Runbook K-48 for Keys in Miami (MIA). Marker xserv-k-7967cc0d2ff9. This page covers docs for LATAM operators, not a worldwide average.

Keys: A note on cost and transit

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

Keys: Why it matters on this continent

Design for Keys on letter K starts in São Paulo (GRU). Runbook k-01 keeps a single owner, a written rollback, and a traffic split that can be reversed without a global freeze. Neighbors in Santiago only take overflow after the local pool fails a health window.

Keys: How XServ runs it day to day

Probes for Keys (k-02) leave Santiago every 15s toward Bogotá. XServ pages the named owner if loss or RTT crosses the letter budget. A probe never shares a queue with bulk transfers, so a saturated WAN does not hide a dead PoP.

Keys peering K-07

Peering for Keys (k-07) prefers the IX fabric that already carries last-mile ISPs in Bogotá. Session counts and prefix limits are on the same page as the Miami backup path.

Keys cache K-08

Cache rules for Keys on k-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.

Keys headers K-09

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

Keys timeouts K-10

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