Dell PowerConnect 6248 User's Guide - Page 33

MAC Multicast Support Multicast service is a limited broadcast service that allows one-to-many and many-to-many connections. In Layer 2 multicast services, a single frame addressed to a specific multicast address is received, and copies of the frame to be transmitted on each relevant port are created. For information about configuring MAC Multicast Support, see "Managing Multicast Support." IPv4 Routing Features Address Resolution Protocol The PowerConnect 6200 Series uses the ARP protocol to associate a layer 2 MAC address with a layer 3 IPv4 address. Additionally, the administrator can statically add entries in to the ARP table. Open Shortest Path First The Open Shortest Path First (OSPF) Routing protocol defines two area types: regular OSPF area and OSPF stub area. OSPF internal and external route information may be propagated throughout the regular OSPF area; it is capable of supporting transit traffic and virtual links. BOOTP/DHCP Relay Agent The BootP protocol allows a device to solicit and receive configuration data and parameters from a suitable server. DHCP is an extension to BootP allowing additional setup parameters to be received from a network server upon system startup. Notably, while BootP stops operating once an IP address is obtained, DHCP service is an on-going process. For example, the IP address assigned to the system has a 'lease time' that may expire, and can be renewed on the fly. Routing Information Protocol The routing protocol used within an autonomous Internet system is referred to as an interior gateway protocol (IGP). RIP is an IGP that is designed to work with moderate-size networks. Virtual Routing Redundancy Protocol Virtual Routing Redundancy Protocol (VRRP) is used to provide hosts with redundant routers in the network topology without any need for the hosts to reconfigure or know that there are multiple routers. IPv6 Routing Features IPv6 6 to 4 Auto Tunnels Automatically formed IPv4 6 to 4 tunnels for carrying IPv6 traffic. The automatic tunnel IPv4 destination address is derived from the 6 to 4 IPv6 address of the tunnel nexthop. There is support the functionality of a 6 to 4 border router that connects a 6 to 4 site to a 6 to 4 domain. It sends/receives tunneled traffic from routers in a 6 to 4 domain that includes other 6 to 4 border routers and 6 to 4 relay routers. Introduction 33