Configure Redundant Pairs - Dell Z9500 Configuration Manual

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.
NOTE: For more information about STP, refer to
Assign a backup interface to an interface using the switchport backup command. The backup interface remains in a Down
state until the primary fails, at which point it transitions to Up state. If the primary interface fails, and later comes up, it becomes
the backup interface for the redundant pair. Dell Networking OS supports Gigabit, 10 Gigabit, and 40-Gigabit interfaces as
backup interfaces.
Spanning Tree Protocol (STP).
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