Administrator Guide
Disabling MAC Address Learning on the System
You can congure the system to not learn MAC addresses from LACP and LLDP BPDUs.
To disable source MAC address learning from LACP and LLDP BPDUs, follow this procedure:
• Disable source MAC address learning from LACP BPDUs.
CONFIGURATION mode
mac-address-table disable-learning lacp
• Disable source MAC address learning from LLDP BPDUs.
CONFIGURATION mode
mac-address-table disable-learning lldp
• Disable source MAC address learning from LACP and LLDP BPDUs.
CONFIGURATION mode
mac-address-table disable-learning
If you don’t use any option, the mac-address-table disable-learning command disables source MAC address learning from
both LACP and LLDP BPDUs.
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, trac
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 congured on the Dell Networking switch at the time that NIC teaming is being congured on the server.
520
Layer 2