Dell PowerConnect 5548 User Guide - Page 15

• Security Features • DHCP Server • Protected Ports • iSCSI Optimization • Proprietary Protocol Filtering IP Version 6 (IPv6) Support The device functions as an IPv6-compliant host, as well as an IPv4 host (also known as dual stack). This enables device operation in a pure IPv6 network as well as in a combined IPv4/IPv6 network. For more information, see "IP Addressing" on page 202. Stack Support The system supports up to eight units with two fixed HDMI stacking ports. The HDMI ports are 1.3a specification, Category 2 High Speed cables, 340 MHz (10.2 Gbit/s). it is recommended to use HDMI cable version 1.4 The stacking feature supports the following features: • Fast-link failover • Software auto-synch. • Improved response time to events, such as master failover • Auto-numbering algorithm when choosing unit number For more information, see "Stacking Overview" on page 43 Power over Ethernet Power over Ethernet (PoE) provides power to devices over existing LAN cabling, without updating or modifying the network infrastructure. When PoE is used, the network devices do not have to be placed next to a power source. PoE can be used in the following applications: • IP Phones • Wireless Access Points Dell PowerConnect 55xx Systems User Guide 15