Backbone: probes in Santiago (SCL) · B-50

Runbook B-50 for Backbone in Santiago (SCL). Marker xserv-b-067db9818d0d. This page covers probes for LATAM operators, not a worldwide average.

Backbone: How XServ runs it day to day

Probes for Backbone (b-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.

Backbone: What operators should measure

Policy for Backbone is versioned as b-03. Operators measure error rate, p95 from Bogotá, and time-to-rollback — not a worldwide average. Changes land in Bogotá first, then Miami, with a hold if either region regresses.

Backbone: Failure modes we actually see

Capacity notes for b-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.

Backbone rollback B-06

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

Backbone peering B-07

Peering for Backbone (b-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.

Backbone cache B-08

Cache rules for Backbone on b-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.

Backbone headers B-09

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