Procedure
Step 1 If you are using Cisco IOS XE Release 3E or later releases, enter the erase startup-config privileged EXEC
command to clear the contents of your startup configuration.
Step 2 Press and hold the Mode button. The switch LEDs blink after about 2 seconds. If the switch is not configured,
the LEDs above the Mode button turn green. You can omit the next step.
Step 3 Continue holding down the Mode button. The LEDs stop blinking after 8 seconds, and then the switch reboots.
You can now configure the switch by using Express Setup as described in the switch getting started guide.
You can also configure the switch by using the CLI setup procedure described in the appendix.
Replacing a Failed Data Stack Member
Procedure
Step 1 The replacement switch must be a Catalyst 3850 switch.
Step 2 Power down the failed switch. Remove AC or DC input power, and if the switch is part of a StackPower stack,
remove the StackPower cables.
Step 3 Make sure the replacement switch is powered off, and then connect it to the stack. If you had manually set
the member numbers for the switch stack, manually assign the member number of the failed switch to the
replacement switch. To manually assign the stack member number, see the switch software configuration
guide on Cisco.com.
Step 4 Make the same Gigabit Ethernet connections on the replacement switch that were on the failed switch.
Step 5 Reinstall any modules, and make cable connections.
Step 6 Power on the replacement switch.
The replacement switch has the same configuration for all the interfaces as the failed switch and functions
the same as the failed switch.
Catalyst 3850 Switch Hardware Installation Guide
119OL-26779-05
Troubleshooting
Replacing a Failed Data Stack Member
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