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mac port-security
NIC Teaming
NIC teaming is a feature that allows multiple network interface cards in a server to be represented by one MAC address and one
IP address in order to provide transparent redundancy, balancing, and to fully utilize network adapter resources.
The following illustration shows a topology where two NICs have been teamed together. In this case, if the primary NIC fails,
traffic switches to the secondary NIC because they are represented by the same set of addresses.
Figure 70. 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 EMC 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.
490 Layer 2