SAN Fabric Questions What is zoning? What is hard and soft zoning and Explain? What is the difference between zone and zone set? Explain step by step procedure for creating soft zoning? Explain step by step procedure for creating hard zoning? What is VSAN and how to create? What is ISL? What is F,E and FL Port? What are the management tools for Switches? How do you troubleshoot the SFP failure? How do you upgrade the firmware? What are the general switch problems?How to Find Brocade switch Model? switchshowHow to find zone directly from Host WWN in CISCO ?show zone member ?How to find the HOST WWN in BROCADE switch? >nodefind 50:01:43:80:02:a3:00:16> fabricshow6. To check the vendor of the SAN disk on a LINUX host Difference between WWN and WWPN?A WWPN (world wide port name) is the unique identifier for a fibre channel port where a WWN (world wide name) the unique identifier for the node itself.A good example is a dual port HBA. There will be two WWPN's (one for each port) and only a single WWN for the card itself. It's actually the firt octet that is changing. Difference between Fabric Switches and DirectorsA director is a class of switch where everything is redundant. Two power supplies, two supervisors, redundant backplane, hot upgrades, etc. So that nothing should bring the director level switch down and cause outage How to find the HOST WWN in CISCO switch?Assuming you know the pwwn of the HBA you are searching for, you can use the following steps to find the switch it is connected to: 1) "show fcns database" - find your pwwn in the output to detemine what FCID is assigned to the device, and note the VSAN. Also, the first byte of the FCID will indicated the Domain ID of the switch the device is attached to. 2) "show topology vsan " search for the switch with the domain id determined in step 1. The "show topology" output also includes the IP address of the mgmt port, so you can quickly ssh/telnet to the host switch and than verify that you've identified the right switch with the output of "show flogi database".