Dell S4048T, Configuration Manual

Page: 604 / 1277

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 74. 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 Spanning Tree Protocol (STP) .
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.
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