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DES-7200 Configuration Guide Chapter 6 REUP Configuration
6-6
instance 2; the packets of VLAN 1-200 (instance 1) will be transmitted via Port 1, and
packets of all other VLANs (instance 2) will be transmitted via Port 2.
Fig 4 Topology in which one link for load balancing is failed
When one of the ports is failed, the other port will be responsible for forwarding
packets of all VLANs. After the failed port has recovered and functions normally within
the preemption delay, it will take over the packets of its responsible VLANs from
another port.
In privileged mode, execute the following steps to configure REUP VLAN load
balancing.
For example:
DES-7200# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
DES-7200(config)#spanning-tree mst configuration
DES-7200(config-mst)#instance 1 vlan 1-200
Command Function
DES-7200# configure terminal
Enter the global configuration mode.
DES-7200(config)# interface interface-id
Enter the interface configuration mode.
DES-7200(config-if)# switchport backup
interface interface-id prefer instance
standby-interface-instance-range
Configure a layer-2 port as the backup port,
and specify the packets of which VLAN
mapping instance will be forwarded by the
backup port.
DES-7200(config-if)# end
Return to privileged mode.
DES-7200# show interface [interface-id]
switchport backup
Show the configurations.
DES-7200# copy running-config
startup-config
Save configurations.