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Cisco Bug: CSCuq50496 - %SYS-3-CPUHOG: L2ISIS Upd Overlay1

Last Modified

Sep 14, 2019

Products (25)

  • Cisco IOS
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases


Description (partial)

CPU hogs with OTV on 3.13.0S/15.4(3)S

This appears to only apply to ISIS OTV Fast Reconvergence feature starting in 3.13.0 for the ASR1000. This bug is caused by Nexus bug which sends the vlan id not using network order. This bug is an inter-op issue.  The Nexus bug has been fixed by CSCuo44890, which is available in NXOS release 6.2.12.
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