Administrator Guide

Figure 72. Redundant NICs with NIC Teaming
When you use NIC teaming, consider that the server MAC address is originally learned on Port 0/1 of the switch (shown in the
following) and Port 0/5 is the failover port. When the NIC fails, the system automatically sends an ARP request for the gateway
or host NIC to resolve the ARP and refresh the egress interface. When the ARP is resolved, the same MAC address is learned
on the same port where the ARP is resolved (in the previous example, this location is Port 0/5 of the switch). To ensure that
the MAC address is disassociated with one port and reassociated with another port in the ARP table, the no mac-address-
table station-move refresh-arp command should not be configured on the Dell Networking switch at the time that
NIC teaming is being configured on the server.
NOTE:
If you have configured the no mac-address-table station-move refresh-arp command, traffic
continues to be forwarded to the failed NIC until the ARP entry on the switch times out.
Figure 73. Configuring the mac-address-table station-move refresh-arp Command
Configure Redundant Pairs
Networks that employ switches that do not support the spanning tree protocol (STP) — for example, networks with digital
subscriber line access multiplexers (DSLAM) — cannot have redundant links between switches because they create switching
loops (as shown in the following illustration).
The redundant pairs feature allows you to create redundant links in networks that do not use STP by configuring backup
interfaces for the interfaces on either side of the primary link.
Layer 2
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