I have a few questions

 

Currently we have Brocade only equipment with the exception of one NPIV 8gbit uplink coming from a Cisco UCS Blade Chassis

 

I configured VC-INIT on the Long distance port , connecting 2 sites over an 8gbit LINK on a Connectrix G620

However I want to generalize on VC-init throughout my fabrics.

It unlocks Virtual Channels, and hereby unlock QOS (zones), quarantaining, buffercredits per channel , ... , most of all better flow control

 

My questions are :

• Suppose I leave it only on my intersite ISL , will VC support only be used for frames threspassing my site over the intersite ISL, but not originating from my initiator path , or over any ISL hops, nor towards my target destination  ?
• Suppose I enable VC-INIT on all my E-PORTS (LD0 mode) , will all frames threspassing ISLs use VCs , but Fports still don't use it .
• Suppose I enable it on all my switchports, would then also benefit my Host/Storage Nodes from the use of VCs ?
• Is there a global setting to enable it switchwide ?
• Are there any prerequisites other then that other FC vendors might not support it ?  Would it then be ok, that in respect to the intersection with the Brocade equipment , you would simply not enable it on the intersection port with such a solution ?