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  • 1.  Connect EX4300 to EX3400 using VC-Ports

    Posted 04-11-2021 08:35
    Hi there,

    I need to use one of the VC ports on the back of an EX4300 as a downlink to an EX3400, also using a VC port.

    I already removed the VC configuration from both ports, but the links don't come up.

    When I connect the EX4300 to another EX4300, the links come up.
    When I connect the EX3400 to another EX3400, the links come up.

    The links stay down when I cross-connect models.

    Is this due to an incompatibility across those families, or is there something I'm missing.

    Thank you.



    ------------------------------
    ALLAN
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  • 2.  RE: Connect EX4300 to EX3400 using VC-Ports

     
    Posted 04-11-2021 20:01
    Yes, there are limits to mixing models of EX switches when doing virtual chassis.  You will not be able to combine the ex4300 with the ex3400.

    You can see all the details of what can be interconnected in this document.

    https://www.juniper.net/documentation/us/en/software/junos/virtual-chassis-qfx/topics/task/virtual-chassis-ex4300-configuring.html

    ------------------------------
    Steve Puluka BSEET - Juniper Ambassador
    IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP)
    http://puluka.com/home
    ------------------------------



  • 3.  RE: Connect EX4300 to EX3400 using VC-Ports

     
    Posted 04-12-2021 02:28
    Try turning off autonegotiation on the EX4300 side. This is also a problem on EX4300 to QFX connections. See the below KB for more information.

    https://kb.juniper.net/InfoCenter/index?page=content&id=KB31457&cat=EX_SERIES&actp=LIST


  • 4.  RE: Connect EX4300 to EX3400 using VC-Ports

     
    Posted 04-12-2021 02:29
    Duplicate deleted