Figure 73. Redundant NICs with NIC TeamingWhen you use NIC teaming, consider that the server MAC address is originally learned on Port 0/1 of the switch (shown in thefollowing) and Port 0/5 is the failover port. When the NIC fails, the system automatically sends an ARP request for the gateway orhost NIC to resolve the ARP and refresh the egress interface. When the ARP is resolved, the same MAC address is learned on thesame port where the ARP is resolved (in the previous example, this location is Port 0/5 of the switch). To ensure that the MACaddress is disassociated with one port and reassociated with another port in the ARP table, the no mac-address-tablestation-move refresh-arp command should not be configured on the Dell Networking switch at the time that NIC teamingis being configured on the server.NOTE: If you have configured the no mac-address-table station-move refresh-arp command, trafficcontinues to be forwarded to the failed NIC until the ARP entry on the switch times out.Figure 74. Configuring the mac-address-table station-move refresh-arp CommandConfigure Redundant PairsNetworks that employ switches that do not support the spanning tree protocol (STP) — for example, networks with digitalsubscriber line access multiplexers (DSLAM) — cannot have redundant links between switches because they create switching loops488 Layer 2
