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DES-7200 Configuration Guide Chapter 6 REUP Configuration
6-9
Fig 6 Failed state during the switchover
After port Gi0/1 of Switch D fails, port Gi0/2 will instantly become active and start to
forward data packets. By this time, Switch A is temporarily unable to learn the MAC
address of PC from port Gi0/4 connected to Switch B, and packets sent by the server
to PC will be forwarded by Switch A to Switch C, causing packet loss.