Cisco Catalyst 3550

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Catalyst 3550 Multilayer Switch Command Reference
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Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
switchport access
• Use dynamic-access ports only to connect end stations. Connecting them to switches or routers (that
use bridging protocols) can cause a loss of connectivity.
• Configure the network so that STP does not put the dynamic-access port into an STP blocking state.
The Port Fast feature is automatically enabled on dynamic-access ports.
• Dynamic-access ports can only be in one VLAN and do not use VLAN tagging.
• Dynamic-access ports cannot be configured as
– Members of an EtherChannel port group (dynamic-access ports cannot be grouped with any
other port, including other dynamic ports).
– Source or destination ports in a static address entry.
– Monitor ports.
– Tunnel ports.
Examples This example shows how to cause a port interface that has already been configured as a switched
interface to operate in VLAN 2 instead of the platform’s default VLAN when in access mode:
Switch(config-if)# switchport access vlan 2
You can verify your setting by entering the show interfaces interface-id switchport privileged EXEC
command and examining information in the Administrative Mode and Operational Mode rows.
Related Commands Command Description
show interfaces switchport Displays the administrative and operational status of a switching
(nonrouting) port, including port blocking and port protection settings.
switchport mode Configures the VLAN membership mode of a port.