Guide to Cisco Switch Configuration Commands and Modes
This article explains the different Cisco device configuration modes—user, privileged, global, and interface—provides command examples for setting hostnames, viewing version and MAC tables, and configuring duplex and speed settings on switch ports, illustrated with screenshots.
Tab key can autocomplete commands.
1. User mode (read‑only, cannot modify advanced configurations).
2. Privileged mode (allows viewing and modifying Cisco device configuration) – use enable.
3. Global mode (modify the switch's global configuration).
4. Interface mode (modify interface configuration). Example: R1(config)#interface fastEthernet 0/1 View help information with ?.
Hostname modification: hostname [new_name] View version information: show version View MAC address table: show mac address-table Configure switch port duplex mode: sw1(config-if)#duplex ? auto Enable AUTO duplex configuration #自动协商
full Force full duplex operation #全双工
half Force half‑duplex operation #半双工
sw1(config)#interface fa0/1sw1(config-if)#duplex fullsw1(config-if)#duplex halfSpecify interface communication speed:
sw1(config)#int fa0/1sw1(config-if)#speed ?10 Force 10 Mbps operation
100 Force 100 Mbps operation
auto Enable AUTO speed configuration
sw1(config-if)#speed 10sw1(config-if)#speed 100View the interface duplex mode and port speed:
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