[Reference:NetApp SANtricity documentation on FC switch integration., Check Cable Connections:, Step:Ensure that the FC cables are properly connected to the switch., Reason:Loose or disconnected cables can cause the ports to appear down., Reference:NetApp hardware installation guides and best practices for cable management., Verify Switch Zoning:, Step:Confirm that the WWPNs for the EF280 and server HBAs are correctly zoned in the Brocade switch., Reason:Incorrect zoning can prevent the devices from communicating, causing the ports to appear down., Reference:Brocade zoning documentation and NetApp SANtricity System Manager guides., References:, NetApp SANtricity System Manager documentation, Brocade switch configuration and zoning guides, NetApp hardware installation and best practices guides, , , ]