24 Introductionw w w . d e l l . c o m | s u p p o r t . d e l l . c o m LAG is composed of ports with the same speed, set to full-duplex operation.For more information, see "Defining LAG Membership".Link Aggregation and LACPLACP uses peer exchanges across links to determine, on an ongoing basis, the aggregationcapability of various links, and continuously provides the maximum level of aggregation capabilityachievable between a given pair of systems. LACP automatically determines, configures, binds andmonitors the port binding to aggregators within the system.For more information, see "Defining LACP Parameters".Layer 3 FeaturesAddress Resolution Protocol (ARP)ARP is a TCP/IP protocol that converts IP addresses into physical addresses. ARP automaticallydetermines Device Next-Hop MAC addresses of systems, including directly attached end systems.Users can override and supplement this by defining additional ARP Table entries.For more information, see "Mapping Domain Host".TCPTransport Control Protocol (TCP) connections are defined between 2 ports by an initialsynchronization exchange. TCP ports are identified by an IP address and a 16-bit port number.Octets streams are divided into TCP packets, each carrying a sequence number.BootP and DHCP ClientsDynamic Host Configuration Protocol (DHCP) enables additional setup parameters to be receivedfrom a network server upon system startup. DHCP service is an on-going process. DHCP is anextension to BootP.For more information on DHCP, see "Defining DHCP IP Interface Parameters".Quality of Service FeaturesClass Of Service 802.1p SupportThe IEEE 802.1p signaling technique is an OSI Layer 2 standard for marking and prioritizingnetwork traffic at the data link/MAC sub-layer. 802.1p traffic is classified and sent to thedestination. No bandwidth reservations or limits are established or enforced. 802.1p is a spin-off ofthe 802.1Q (VLANs) standard. 802.1p establishes eight levels of priority, similar to the IPPrecedence IP Header bit-field.For more information, see "Configuring Quality of Service".
