Introduction 33MAC Multicast SupportMulticast 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, andcopies 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 FeaturesAddress Resolution ProtocolThe PowerConnect 6200 Series uses the ARP protocol to associate a layer 2 MAC address with a layer 3IPv4 address. Additionally, the administrator can statically add entries in to the ARP table.Open Shortest Path FirstThe Open Shortest Path First (OSPF) Routing protocol defines two area types: regular OSPF area andOSPF stub area. OSPF internal and external route information may be propagated throughout theregular OSPF area; it is capable of supporting transit traffic and virtual links.BOOTP/DHCP Relay AgentThe BootP protocol allows a device to solicit and receive configuration data and parameters from asuitable server. DHCP is an extension to BootP allowing additional setup parameters to be received froma network server upon system startup. Notably, while BootP stops operating once an IP address isobtained, 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 ProtocolThe routing protocol used within an autonomous Internet system is referred to as an interior gatewayprotocol (IGP). RIP is an IGP that is designed to work with moderate-size networks.Virtual Routing Redundancy ProtocolVirtual Routing Redundancy Protocol (VRRP) is used to provide hosts with redundant routers in thenetwork topology without any need for the hosts to reconfigure or know that there are multiple routers.IPv6 Routing FeaturesIPv6 6 to 4 Auto TunnelsAutomatically formed IPv4 6 to 4 tunnels for carrying IPv6 traffic. The automatic tunnel IPv4destination address is derived from the 6 to 4 IPv6 address of the tunnel nexthop. There is support thefunctionality of a 6 to 4 border router that connects a 6 to 4 site to a 6 to 4 domain. It sends/receivestunneled traffic from routers in a 6 to 4 domain that includes other 6 to 4 border routers and 6 to 4 relayrouters.
