Lenovo RackSwitch G8264CS Application Manual page 66

Enter d to disable VLAN trunk mode/tagging for the port or enter e to enable
VLAN tagging for the port. To keep the current setting, press <Enter>.
6. The system prompts you to configure the next port:
Enter port (INT1-14, MGT1-2, EXT1-64, MGT):
When you are through configuring ports, press <Enter> without specifying any
port. Otherwise, repeat the steps in this section.
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G8264CS Application Guide for ENOS 8.4