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Cisco Bug: CSCun99811 - EPM DMMv1s erroneously rejected due to lack of backwards compatability

Last Modified

Feb 05, 2016

Products (17)

  • Cisco IOS
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901-6CZ-FT-A Router
  • Cisco ASR 901-12C-FT-D Router
  • Cisco 7600 Series Route Switch Processor 720 with Multilayer Switch Feature Card
  • Cisco 7600 Series Route Switch Processor 720 with 10 Gigabit Ethernet Uplinks
  • Cisco ASR 901-6CZ-FT-D Router
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Known Affected Releases

15.3(3)S

Description (partial)

Symptom: If a Cisco IOS box does not support Ethernet Y.1731 delay DMM version 1 (DMMv1), but supports DMM version 0 (DMM), it will not respond to a box trying to run a DMMv1 session.
Conditions: This symptom occurs with an initiator box running DMMv1 to a Cisco IOS box that supports DMM but does not support DMMv1. Rather than responding as though it were receiving DMMs version 0, as is the required behavior, the session will be rejected.
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