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ChrisOD
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‎02-24-2014 10:43 AM

‎02-24-2014 10:43 AM

Jumbo Frames over IRF on 5820 switches

   I have a storage backbone set up on two 5820 switches connected through IRF.  The protocol i 10Gb iSCSI connected to ESXi servers to EMC VNX2500 storage arrays.

  When I constructed the switches, I set the ports to accept Jumbo frames, but did not activate them on the storage arrays or servers.  Recently a consultant advized us to turn on Jumbo frames in the situation, so I started looking at IMC to check out the proper settings on the switches.  IMC shows the physical ports that are used in the IRF as having an MTU of 1500.  The CLI does not give me an option to specify the MTU either on the physical or virtual IRF ports, so I want to confirm what is the actual setting.

   It could be that IMC does not see an MTU specified and so assumes it is the default is 1500.  How can I confirm this?

  How does IRF handle frames between two switches?  Does an MTU even matter on an IRF link?

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