BGP session flap with Lumen in New York (NYC1)
- Affected:
- Network · NYC1
- Duration
- 1 h 35
- Reference
inc-20260816-1
Timeline
- Resolved
Resolved. Total impact: intermittent reroutes for about 95 minutes; no session was lost on customer servers.
- Monitoring
The session has been stable for 20 minutes after the carrier corrected the interface configuration.
- Identified
The flap is caused by an MTU mismatch introduced during a carrier-side change. The session is administratively shut while it is corrected.
- Investigating
One of our BGP sessions with Lumen in New York (NYC1) is flapping. Some destinations may see brief reroutes and increased latency.
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