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The control engine that is in standby mode is actually in a stateful-standby mode such that it keeps sync with all major management and control protocols that the active control engine maintains . 802.1x-based user authentication can be extended to dynamically assign a VLAN based on a specific user , regardless of where they connect on the network . Graphical trend charts and an alert LED help you identify problems before they cause network outages . For example , an installation of an active zone set within VSAN 1 does not affect the fabric in any way within VSAN 2 . Using " Proxy mode 2 " , replication services are seamlessly added to the fabric , while maintaining all WWNs originally used . The KBX5000 solution operates SANTap services in " Proxy mode 2 " . This mode aims to simplify the deployment and support replication services on all ports available in the fabric , both SSM FC ports and " normal " FC ports . Using the 802.1x standard and the Cisco Secure Access Control Server ( ACS ) , users can be assigned a VLAN upon authentication , regardless of where they connect to the network . The switches are designed to be used outside the wiring closet in the end-user workspace , and feature a durable metal shell , no fan for silent operation , easy wall or under-the-desk mounting , a security lock slot to prevent theft , and an available cable guard to secure the Ethernet cables and switch . In addition to hardware redundancy , the Cisco MDS 9500 Series provides highly resilient software with an innovative high-availability feature set designed to eliminate downtime in the storage network . This product line offers two distinct sets of software features and a range of configurations to allow small , midsize , and enterprise branch offices to select the right combination for the network edge . A display filter is provided to remove additional information , so you can view only the frames of greatest interest .