32 Dell PowerConnect 55xx Systems User GuideFILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Maintenance Projects\DellContax\sources\CxUGFeatures.fmD E L L C O N F I D E N T I A L – P R E L I M I N A R Y 1 0 / 3 0 / 1 3 - F O R P R O O F O N LYDHCP ServerDynamic Host Configuration Protocol (DHCP) provides a means of passingconfiguration information (including the IP address of a TFTP server and aconfiguration file name) to hosts on a TCP/IP network. The switch can serveas a DHCP server or client.For more information on the device serving as a DHCP server, see "DHCPServer" on page 297.For more information on the device serving as a DHCP client, see "DHCPIPv4 Interface" on page 214.Protected PortsThe Protected Ports feature provides Layer 2 isolation between interfaces(Ethernet ports and LAGs) that share the same Broadcast domain (VLAN)with other interfaces.For more information, see "Protected Ports" on page 395.iSCSI OptimizationiSCSI optimization provides the iSCSI flows with specific priority over othernetwork traffic. In addition, the feature provides monitoring of iSCSIsessions.For more information, see "iSCSI Optimization" on page 595.Proprietary Protocol FilteringThis feature enables user control over the filtering of packets with proprietaryprotocols such as CDP, VTP, DTP, UDLD, PaGP, and SSTP. The user canselect any combination of the protocols to be filtered, for example: CDP andVTP and UDLD.For more information, see "Network Security" on page 97.DHCP Relay and Option 82A DHCP relay agent detects DHCP Broadcasts from DHCP clients and relaysthem to DHCP servers that may reside on different subnets.
