Arista EOS for MLAG Upgrade

Discussion in 'Networking' started by DidRo, Sep 11, 2018.

  1. DidRo

    DidRo New Member

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    Hello all.

    It was necessary to upgrade from branch 4.14 to version 4.18.5M in accordance with MLAG ISSU Table.
    In the current state, a seamless transition is possible through several intermediate versions:
    4.16.7FX
    4.16.8FX


    Maybe someone has one of these?
     
    #1
  2. fohdeesha

    fohdeesha Well-Known Member

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    just shut'er down fam
     
    #2
  3. DidRo

    DidRo New Member

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    In general, I was able to upgrade EOS version on both MLAG domain switches to 4.18.5M without packet loss.
    Using the method of sequential search, I found that from version 4.14.5FX.2 it's possible to upgrade to version 4.20.2.1F or 4.20.5F.
    You need to upgrade first switch to one of these versions. After that, you need to upgrade second switch to 4.18.5M. Coupled with version 4.20.5F, peer-config is inconsistent, but this does not prevent the switch from working properly as a switch, since I do not use other functions on the TOR switches. The last step is to change the EOS on the first switch to 4.18.5M.

    It should be said that with version 4.20.2.1F on both MLAG domain switches there were problems with STP. Cisco PVST switches (directly connected to MSTP MLAG domain) changed the state of the ports to an err-disabled. In my case it was better not to take risks and use the transition version 4.20.5F.
     
    #3
    Last edited: Sep 13, 2018
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