Does Virtual IP on letter V share fate with other letters?

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

Where is Virtual IP measured first?

From Santiago (SCL) toward Bogotá. A global average is not an SLO for letter V.

Virtual IP: design in São Paulo (GRU) · V-01

Runbook V-01 for Virtual IP in São Paulo (GRU). Marker xserv-v-d49250ce58f7. This page covers design for LATAM operators, not a worldwide average.

Virtual IP: Why it matters on this continent

Design for Virtual IP on letter V starts in São Paulo (GRU). Runbook v-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.

Virtual IP: How XServ runs it day to day

Probes for Virtual IP (v-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.

Virtual IP: What operators should measure

Policy for Virtual IP is versioned as v-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.

Virtual IP peering V-07

Peering for Virtual IP (v-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.

Virtual IP cache V-08

Cache rules for Virtual IP on v-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.

Virtual IP headers V-09

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

Virtual IP timeouts V-10

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