address-table station-move refresh-arp command on the switch at the time that NIC teaming
is being configured on the server.
NOTE: If you do not configure the 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 65. 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. The
system supports 10 Gigabit and 40-Gigabit interfaces as backup interfaces.
Apply all other configurations to each interface in the redundant pair such that their configurations are
identical, so that transition to the backup interface in the event of a failure is transparent to rest of the
network.
Layer 2 535