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Chapter 12
Configuring Dynamic Port VLAN Membership with VMPS
Table 12-1 Default VMPS Client and Dynamic Port Configuration (continued)
Feature
VMPS server retry count
Dynamic ports
Dynamic Port VLAN Membership and VMPS Configuration
Guidelines
These guidelines and restrictions apply to dynamic port VLAN membership:
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•
•
•
•
•
Note
The VTP management domain and the management VLAN of VMPS clients and the VMPS server must
be the same. For more information, see
VLANs."
Configuring VMPS and Dynamic Port VLAN Membership
These sections describe how to configure VMPS and define dynamic ports on clients:
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Creating the VMPS Database
To use VMPS, you first must create a VMPS database and store it on a TFTP server. The VMPS parser
is line based. Start each entry in the file on a new line. Ranges are not allowed for the port numbers.
78-12647-02
You cannot configure a Catalyst 4000 family switch as a VMPS server.
You must configure VMPS before you configure ports as dynamic.
When you configure a port as dynamic, spanning tree PortFast is enabled automatically for that port.
Automatic enabling of spanning tree PortFast prevents applications on the host from timing out and
entering loops caused by incorrect configurations. You can disable spanning tree PortFast mode on
a dynamic port.
If you reconfigure a port from a static port to a dynamic port on the same VLAN, the port connects
immediately to that VLAN. However, VMPS checks the legality of the specific host on the dynamic
port after a specified period.
Static secure ports cannot become dynamic ports. You must turn off security on the static secure port
before it can become dynamic.
Static ports that are trunking cannot become dynamic ports. You must turn off trunking on the trunk
port before changing it from static to dynamic.
Creating the VMPS Database, page 12-3
Configuring VMPS, page 12-4
Configuring Dynamic Ports on VMPS Clients, page 12-5
Configuring Static VLAN Port Membership, page 12-6
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
Dynamic Port VLAN Membership and VMPS Configuration Guidelines
Default Configuration
3 attempts
No dynamic ports configured
Chapter 9, "Configuring VTP,"
and
Chapter 10, "Configuring
12-3
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Troubleshooting
