Lenovo CN4093 Application Manual page 229

5. Set the stacking mode.
6. Configure the stacking VLAN on the new switch, or use the default setting.
7. Designate the stacking links.
8. Attach the required stack link cables to the designated stack links on the new
switch.
9. Attach the desired network cables to the new switch.
10. Reboot the new switch:
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By default, each switch is set to Member mode. However, if the incoming switch
has been used in another stacking configuration, it may be necessary to ensure the
proper mode is set.
 If replacing a Member or Backup switch:
CN 4093(config)# boot stack mode member
 If replacing a Master switch:
CN 4093(config)# boot stack mode master
Although any VLAN may be defined for stack traffic, it is highly recommended
that the default, VLAN 4090, be reserved for stacking, as shown in the following
command.
CN 4093(config)# boot stack vlan 4090
Use the following command to specify the links to be used in the stacking LAG:
CN 4093(config)# boot stack higig-trunk <list of external port s>
CN 4093(config)# reload
When the new switch boots, it will join the existing stack. Wait for this process to
complete.
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Chapter 13: Stacking