Analyzed a real 1GB accel-ppp log (2026-07-23): only 2,819 of its lines
were error:/warn:, and one pattern - "can't determine router address" -
repeated 2,746 times over ~4 hours for two specific subscriber interfaces
before self-resolving, completely unalerted since no alert covered it.
- New pipeline rules for 3 previously-unclassified real message types
(radius:dm_coa session not found, mac change detected, dhcpv4 short
packet) plus a text-based fallback pair (accelppp_unclassified_error/
warn) for anything not yet specifically classified - needed because
Vector-shipped accel-ppp lines have no real syslog PRI header, so the
numeric-severity generic_critical_severity rule never fires for this
source.
- New alert7: group by gl2_remote_ip + event_type, fires on >5 occurrences
in 5 minutes - low enough to have caught the real incident within its
first cycle, high enough to tolerate a single transient warning.
- vector-accel-ppp-setup.md gained a "keep only error/warn" filter option
(Step 2b), explicitly documented as a deliberate tradeoff: it also drops
RADIUS accounting, so the Servers & Sessions dashboard and session
correlation go empty for any server that applies it. Both the
with-filter and without-filter full configs are included so the choice
is per-server, not global.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
