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Cisco Bug: CSCuq76005 - Whales: IPv4 Multicast packets with TTL=0 not dropped

Last Modified

Feb 02, 2017

Products (20)

  • Cisco ME 3600X Series Ethernet Access Switches
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ME 3600X-24TS-M Switch
  • 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

15.5(1)S

Description (partial) 

Symptom:
Multicast IP packets with "TTL field" value 0 were processed and forwarded. Observed unexpected traffic, this may be a potential DOS.

Conditions:
TTL value of 0 was decremented and forwarded with TTL value 255.
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Bug Details Include

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  • Status
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