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Cisco Bug: CSCus68673 - IPv6 DHCP server writes zero-byte database file to local flash

Last Modified

May 09, 2018

Products (16)

  • Cisco IOS
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
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Known Affected Releases

15.5(1)S

Description (partial)

Symptom:
A Cisco router acting as a DHCPv6 server, with the DHCPv6 persistent database feature enabled, may write a zero-byte database file to the local filesystem.

When the system attempts to store DHCPv6 bindings to this zero-byte database, this creates an error condition that will eventually cause the system to crash.

Conditions:
This will occur if the DHCPv6 persistent database feature is configured, and the database file is stored on a local flash device. A line similar to the following will be present in global config:

ipv6 dhcp database flash:dhcpv6-binding-agent-database
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Bug Details Include

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  • Status
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