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Cisco Bug: CSCvv76625 - stepsRemoved incorrect (always 1)

Last Modified

Oct 08, 2020

Products (1)

  • Cisco ASR 920 Series Aggregation Services Router

Known Affected Releases

17.3.1

Description (partial)

Symptom:
after some convergence events stepsRemoved incorrect (always 1) in show platform soft ptp foreign domain X output on a T-BC node
stepsRemoved is correct on the upstream master


PN-R2#sh plat soft ptp foreign dom 24
PTPd Foreign Master Information:

Current Master: R3-UP

Port: R3-UP
  GM Clock Identity: 0x00:00:00:00:00:00:00:01
  Clock Stream Id: 1
  Priority1: 128
  Priority2: 10
  Local Priority: 10
  Clock Quality:
    Class: 6
    Accuracy: Within 100ns
    Offset (Log Variance): 0x4E5D
  Source Port Identity:
    Clock Identity: 0x00:FE:C8:FF:FE:20:2E:BF
    Port Number: 3
  Steps Removed: 2
  masterOnly: FALSE
  Qualified: TRUE

Port: R10-INTRA
  GM Clock Identity: 0x00:00:00:00:00:00:00:02
  Clock Stream Id: 0
  Priority1: 128
  Priority2: 10
  Local Priority: 20
  Clock Quality:
    Class: 6
    Accuracy: Within 100ns
    Offset (Log Variance): 0x4E5D
  Source Port Identity:
    Clock Identity: 0x18:80:90:FF:FE:55:28:3F
    Port Number: 3
  Steps Removed: 1					<<<< incorrect
  masterOnly: FALSE
  Qualified: TRUE

Conditions:
platform: ASR-920-12SZ-IM, ASR-920-24SZ-IM
trigger: not understood yet

G.8275.1, two T-GMs connected with identical Announce parameters (different Clock Identities, of course)

T-GM1
Port: R3-UP
  GM Clock Identity: 0x00:00:00:00:00:00:00:01
  Clock Stream Id: 1
  Priority1: 128
  Priority2: 10
  Local Priority: 10
  Clock Quality:
    Class: 6
    Accuracy: Within 100ns
    Offset (Log Variance): 0x4E5D
...

T-GM2
Port: R10-INTRA
  GM Clock Identity: 0x00:00:00:00:00:00:00:02
  Clock Stream Id: 0
  Priority1: 128
  Priority2: 10
  Local Priority: 20
  Clock Quality:
    Class: 6
    Accuracy: Within 100ns
    Offset (Log Variance): 0x4E5D
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