Switchport Access - Cisco Catalyst 3750 Metro Command Reference Manual

switchport access

switchport access
Use the switchport access interface configuration command to configure a port as a static-access or
dynamic-access port. If the switchport mode is set to access, the port operates as a member of the
specified VLAN. If set to dynamic, the port starts discovery of VLAN assignment based on the incoming
packets it receives. Use the no form of this command to reset the access mode to the default VLAN for
the switch.
Syntax Description vlan vlan-id
vlan dynamic
Defaults The default access VLAN and trunk interface native VLAN is a default VLAN corresponding to the
platform or interface hardware.
A dynamic-access port is initially a member of no VLAN and receives its assignment based on the packet
it receives.
Command Modes Interface configuration
Command History Release
12.1(14)AX
Usage Guidelines The no switchport access command resets the access mode VLAN to the appropriate default VLAN for
the device.
The port must be in access mode before the switchport access vlan command can take effect.
An access port can be assigned to only one VLAN.
The VMPS server (such as a Catalyst 6500 series switch) must be configured before a port is configured
as dynamic.
These restrictions apply to dynamic-access ports:
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Catalyst 3750 Metro Switch Command Reference
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switchport access vlan {vlan-id | dynamic}
no switchport access vlan
Configure the interface as a static access port with the VLAN ID of the
access mode VLAN; the range is 1 to 4094.
Specify that the access mode VLAN is dependent on the VLAN Membership
Policy Server (VMPS) protocol. The port is assigned to a VLAN based on
the source MAC address of a host (or hosts) connected to the port. The switch
sends every new MAC address received to the VMPS server to obtain the
VLAN name to which the dynamic-access port should be assigned. If the port
already has a VLAN assigned and the source has already been approved by
the VMPS, the switch forwards the packet to the VLAN.
Modification
This command was introduced.
The software implements the VLAN Query Protocol (VQP) client, which can query a VMPS such
as a Catalyst 6000 series switch. This switch cannot be a VMPS servers. The VMPS server must be
configured before a port is configured as dynamic.
Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
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