• Enter the ip vlan-flooding command to specify that all Layer 3 unicast routed data traffic going through a VLAN member portfloods across all the member ports of that VLAN.CONFIGURATION modeip vlan-floodingThere might be some ARP table entries that are resolved through ARP packets, which had the Ethernet MAC SA different from theMAC information inside the ARP packet. This unicast data traffic flooding occurs only for those packets that use these ARP entries.Enabling a Switch for Multicast NLBTo enable a switch for Multicast NLB mode, perform the following steps:1 Add a static ARP entry by entering the arp ip-address multicast-mac-address command in the Global configurationmode to associate an IP address with a multicast MAC address in the switch.CONFIGURATION modearp ip-address multicast-mac-address interfaceThis setting causes the multicast MAC address to be mapped to the Cluster IP address for the NLB mode of operation of the switch.NOTE: While configuring static ARP for the Cluster IP, provide any one of the interfaces that is used in the staticmulticast MAC configuration, where the Cluster host is connected. As the switch does not accept only one ARP-interface pair, if you configure static ARP with each egress interface, the switch overwrites the previous egress-interface configuration.2 Associate specific MAC or hardware addresses to VLANs.CONFIGURATION modemac-address-table static multicast-mac-address vlan vlan-id output-range interfaceNOTE: When you use the mac-address-table static multicast-mac-address command in a VLT setup, DellNetworking OS recommends to add VLTi as one of the egress interfaces along with other cluster facing interfaces.Microsoft Network Load Balancing 515
