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Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
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Chapter 8 Configuring VLANs
Assigning Static-Access Ports to a VLAN
Assigning Static-Access Ports to a VLAN
By default, all ports are static-access ports assigned to the management VLAN, VLAN 1.
You can assign a static-access port to a VLAN without having VTP globally propagate VLAN
configuration information (VTP is disabled). Configuring the switch for VTP transparent mode disables
VTP.
Beginning in privileged EXEC mode, follow these steps to assign ports for multi-VLAN membership:
Overlapping VLANs and Multi-VLAN Ports
A multi-VLAN port connected to a router can link two or more VLANs. Intra-VLAN traffic stays within
the boundaries of the respective VLANs as shown in Figure 8-2. Connectivity between VLANs is
through the router connected to the multi-VLAN port.
A multi-VLAN port performs normal switching functions in all its assigned VLANs. For example, when
a multi-VLAN port receives an unknown Media Access Control (MAC) address, all the VLANs to which
the port belongs learn the address. Multi-VLAN ports also respond to the STP messages generated by
the different instances of STP in each VLAN.
For the restrictions that apply to multi-VLAN ports, see the “Avoiding Configuration Conflicts” section
on page 9-7.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface Enter interface configuration mode, and enter the port to be added to the
VLAN.
Step 3
switchport mode multi Enter the VLAN membership mode for multi-VLAN ports.
Step 4
switchport multi vlan vlan-list Assign the port to more than one VLAN.
Separate nonconsecutive VLAN IDs with a comma; use a hyphen to
designate a range of IDs.
Configuring a switch port for multi-VLAN mode causes VTP to transition to
transparent mode, which disables VTP.
Step 5
end Return to privileged EXEC mode.
Step 6
show interface interface-id
switchport
Verify your entries.
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