Switching

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Ask questions and share experiences about EX and QFX portfolios and all switching solutions across your data center, campus, and branch locations.

  • 1.  32Gbps VC cable instead of 64Gbps

    Posted 03-07-2011 06:44

    Hi all,

     

       The Juniper marketing and tech documents state that the EX-4200 Virtual Chassis connections occur at 128Gbps.  Each cable providing you with 64Gbps. 

     

    When I do a show command I see that the speed is actually 32Gbps.   Is there some special Cisco math I am not getting here.

     

     

    show virtual-chassis vc-port
fpc0:
--------------------------------------------------------------------------
Interface   Type              Trunk  Status       Speed        Neighbor
or                             ID                 (mbps)       ID  Interface
PIC / Port
vcp-0       Dedicated           1    Up           32000        1   vcp-1
vcp-1       Dedicated           2    Up           32000        1   vcp-0

     

     



  • 2.  RE: 32Gbps VC cable instead of 64Gbps
    Best Answer

    Posted 03-07-2011 09:42

    I think it's a case of Cisco math.

     

    32G full-duplex, so they call it 64G.  You have 2 connections between cluster members to create a ring, so they call it 128G.

     

    I could be wrong, but that's how I interpret it.



  • 3.  RE: 32Gbps VC cable instead of 64Gbps

    Posted 03-07-2011 09:44

    Makes sense. 

     

    Thanks.



  • 4.  RE: 32Gbps VC cable instead of 64Gbps

    Posted 03-08-2011 11:12

    64Gbps full-duplex per port.  Two ports would render 128Gbps full-duplex aggregate.