Use case · BGP assurance

Know why the path changed — and when.

When traffic silently shifts to a backup provider, the cause is almost always a BGP attribute change. Phantom captures both directions of every session with the full attribute set and history.

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How Phantom does it

The full decision context, tracked over time.

Collect advertised and received prefixes per neighbor, with AS-path, local-pref, MED, communities, weight and next-hop.
See not just what was chosen, but why — and diff it against yesterday.
Detect path shifts, prefix flaps and route instability with stability profiling.
Surface asymmetric routing that quietly breaks stateful firewalls and adds latency.

Example

A customer's traffic suddenly egresses via the backup ISP. Phantom shows the local-pref on the primary path dropped and the AS-path lengthened after a peer reset — pinpointing the attribute change and its timestamp in minutes.

BGP · prefixesRoute-flap & stabilityAsymmetric routing

Know why the path changed — and when.

The full decision context, tracked over time.

See your BGP paths and attribute history.