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Cisco Bug: CSCur29193 - HC+BC sending packets to downstream when it is in FREQ_LOCKED.

Last Modified

Jan 29, 2017

Products (1)

  • Cisco ASR 900 Series Aggregation Services Routers

Known Affected Releases

15.4(3)

Description (partial)

Symptom:
When a Hybrid-Boundary Clock (HC-BC) node loses the phase and comes to frequency lock, it still sends PTP packets to its slaves; Which is not correct. A HC-BC node should send packets to its slave only if it itself is in PA state. 

In this bug the problem is that even if HC-BC node loses phase, it still drives the slaves and as slaves receive PTP packets they remain in PA, which is not correct as the master (HC-BC) is not in PA itself.

Conditions:
Hybrid Boundary clock (HC-BC) PTP configuration.
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