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VCS Status Online and Fabric Status Online despite different softwrare versions

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TitleVCS Status Online and Fabric Status Online despite different softwrare versions
Symptoms
In show vcs all Rbridges show as VCS Status Online and Fabric Status Online despite there being a mix of similar but different software versions in show version rbridge-id all. For example, NOS 7.2.0a and 7.2.0b.
Environment
  • VDX6740
  • Logical chassis VCS
  • Similar but different software versions. For example, NOS 7.2.0a and 7.2.0b.
Cause
It is possible for a logical chassis VCS to form between rbridges with slightly different software versions. This is an inevitable, temporary condition when performing certain upgrade procedures such as upgrading nodes by using an even / odd approach. However this is intended to be a temporary condition. Continuous usage of mixed versions in a logical chassis VCS is not supported.
Resolution
Software upgrade must be completed and software versions unified within the VCS as soon as possible.
Additional notes

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