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Cisco Bug: CSCun65617 - 8510 cluster backplane lockup causing DSP crash with os_exit htod retran

Last Modified

Oct 17, 2019

Products (16)

  • Cisco TelePresence MCU 4500 Series
  • Cisco TelePresence MCU 4520
  • Cisco TelePresence MCU 4505
  • Cisco TelePresence MCU 5320
  • Cisco TelePresence MCU 4510
  • Cisco TelePresence MSE 8000
  • Cisco TelePresence MCU 4205
  • Cisco TelePresence MCU 4215
  • Cisco TelePresence MCU 4220
  • Cisco TelePresence MCU MSE 8420
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Known Affected Releases

4.1(1.59) 4.2(1.50) 4.3(2.30) 4.3(2.32) 4.4(3.42) 4.4(3.49) 4.4(3.54) 4.4(3.57) 4.4(3.67) 4.5(1.45)

Description (partial)

Symptom:
MCU 8510 cluster backplane lockup causing DSP crash with os_exit htod retransmission timeout

Conditions:
A combination of the following factors may increase the probability of a backplane lockup:
1. Endpoint(s) sending corrupted media
2. Being connected into a network that multicast udp traffic
3. Cluster size. I.e. 3-blade clusters are more prone to failure than 2-blade.
4. System call load (high utilisation is likely to increase the probability of coming across this)
5. Marginal hardware (some media blades may be prone to come across this compared to others)
6. Operational environment (failures are more likely when operated at a high temperature)
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
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