Specifications

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Catalyst 2950 and Catalyst 2955 Switch Command Reference
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Chapter 2 Cisco IOS Commands
switchport access
These restrictions apply to dynamic-access ports:
• The software implements the VLAN Query Protocol (VQP) client, which can query a VMPS such
as a Catalyst 6000 series switch. The Catalyst 3550 switches are not VMPS servers. The VMPS
server must be configured before a port is configured as dynamic.
• 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 Spanning Tree Protocol (STP) does not put the dynamic-access port
in 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.
Examples This example shows how to assign a port already in access mode to VLAN 2 (instead of the default
VLAN 1):
Switch(config-if)# switchport access vlan 2
You can verify your settings 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.