Deploying 2 9706 Directors in HP enclosure environment, need some planning advice

Hi,

Just wanted to get the ball rolling, i am upgrading our current pair of Cisco 9222's to MDS 9706's. We have 3 EMC SAN's and 6 HP 7000 enclosures. Is it a best practice to give each enclosure its own vsan? Thats the way i think i want to do it.