Simple. You cannot go faster than the slowest link.

Any VLAN share the bandwidth workload and do not provide a dedicated bandwidth for each of them.   That means if you have multiple VLAN coming out of the same wire of your server you do not have "n" time the bandwidth but only a fraction of it.  Simple network maths.

Also iSCSI works better by using segregated IP network switches.  Beware that some switches do not guaranty full 1Gbits speed on all ports when all active at the same time.   Plan multiple uplinks if you have more than one switch. Once again you cannot go faster than the slowest link.

Jean


gm_sjo wrote:
2008/9/30 Jean Dion <[EMAIL PROTECTED]>:
  
iSCSI requires dedicated network and not a shared network or even VLAN.  Backup cause large I/O that fill your network quickly.  Like ans SAN today.
    

Could you clarify why it is not suitable to use VLANs for iSCSI?
  
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