5524 - Jumbo Frames - to entire unit or only to some ports/vlan

Hi,

does someone idea, if it´s possible to use Jumbo Frames only to a specific ports?

After enable JumboFrames, it will create some issue to common computers network traffic?? I was planning to create a VLAN to connect the storage and R620 (running XenServers).

* we are planning to use that unit to connect a Dell Power Vault MD3200i offering volumes as iSCSI.

* according to mannual of our switch (ftp://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_powerconnect/powerconnect-5524_User%27s%20Guide_en-us.pdf ): "Enabling iSCSI automatically enables Jumbo frames and enables Flow Control on all interfaces."