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Cisco Bug: CSCup90494 - Semaphore unlock error TB with BB regresn with XE3.13 from IPv6 int sem

Last Modified

Jul 12, 2021

Products (14)

  • Cisco 1000 Series Integrated Services Routers
  • Cisco Catalyst 9500 Series Switches
  • Cisco Catalyst 3850 Series Switches
  • Cisco Catalyst 3650 Series Switches
  • Cisco Catalyst 9800 Series Wireless Controllers
  • Cisco 4000 Series Integrated Services Routers
  • Cisco Catalyst 9200 Series Switches
  • Cisco Catalyst 9600 Series Switches
  • Cisco ASR 1000 Series Aggregation Services Routers
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Known Affected Releases

15.3(3)S 15.4(2)S0.1

Description (partial)

The trace-backs are seen 
Sep 17 20:29:30.454 EDT: %IPV6_INTF-3-INTERNAL: [PPP Events] Semaphore lock error in
ipv6_idb_protocol_change - owner L2TUN Application Manager -Process= "PPP Events", ipl= 0, pid= 574

The issue us seen with proficle 12b having 64K L2TP sessions.
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