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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter13 Configuring VLANs
Configuring VMPS
•IEEE 802.1x ports cannot be configured as dynamic-access ports. If you try to enable IEEE 802.1x
on a dynamic-access (VQP) port, an error message appears, and IEEE 802.1x is not enabled. If you
try to change an IEEE 802.1x-enabled port to dynamic VLAN assignment, an err or message appears,
and the VLAN configuration is not changed.
•Trunk ports cannot be dynamic-access ports, but you can enter the switchport access vlan dynamic
interface configuration command for a trunk port. In this case, the switch retains the setting and
applies it if the port is later configured as an access port.
You must turn off trunking on the port before the dynamic-access setting takes effect.
•Dynamic-access ports cannot be monitor ports.
•Secure ports cannot be dynamic-access ports. You must disable port security on a port before it
becomes dynamic.
•Private VLAN ports cannot be dynamic-access ports.
•Dynamic-access ports cannot be members of an EtherChannel g roup.
•Port channels cannot be configured as dynamic-access ports.
•A dynamic-access port can participate in fallback bridging.
•The VTP management domain of the VMPS client and the VMPS server must be the same.
•The VLAN configured on the VMPS server should not be a voice VLAN.
Configuring the VMPS Client
You configure dynamic VLANs by using the VMPS (server). The switch can be a VMPS client; it cannot
be a VMPS server.

Entering the IP Address of the VMPS

You must first enter the IP address of the server to configure the switch as a client.
Note If the VMPS is being defined for a cluster of switches, enter the address on the command switch.
Beginning in privileged EXEC mode, follow these steps to enter the IP address of the VMPS:
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 vmps server ipaddress primary Enter the IP address of the switch acting as the primary VMPS server.
Step3 vmps server ipaddress (Optional) Enter the IP address of the switch acting as a secondary VMPS
server.
You can enter up to three secondary server addresses.
Step4 end Return to privileged EXEC mode.
Step5 show vmps Verify your entries in the VMPS Domain Server field of the display.
Step6 copy running-config startup-config (Optional) Save your entries in the configuration file.