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Dynamic Port VLAN Membership with Auxiliary VLANs
To configure VMPS and dynamic ports, follow these steps:
Configure the VMPS server addresses on each VMPS client:
Step 1
a.
b.
c.
Configure port 3/1 on Switch 2 as dynamic:
Step 2
Console> (enable) set port membership 3/1 dynamic
Connect End Station 2 on port 3/1. When End Station 2 sends a packet, Switch 2 sends a query to the
Step 3
primary VMPS server, Switch 1. Switch 1 responds with the VLAN to assign to port 3/1. Because
spanning tree PortFast mode is enabled by default on dynamic ports, port 3/1 connects immediately and
enters forwarding mode.
Step 4
Repeat Steps 2 and 3 to configure the VMPS server addresses and assign dynamic ports on each VMPS
client switch.
Dynamic Port VLAN Membership with Auxiliary VLANs
This feature requires software release 6.2(1) or later releases.
Note
This section describes how to configure a dynamic port to belong to two VLANs—a native VLAN and
an auxiliary VLAN. This section uses the following terminology:
•
•
•
•
Prior to software release 6.2(1), dynamic ports could only belong to one VLAN. You could not enable the
dynamic port VLAN feature on ports that carried a native VLAN and an auxiliary VLAN.
With software releases 6.2(1) and later, the dynamic ports can belong to two VLANs. The switch port
configured for connecting an IP phone can have separate VLANs configured for carrying:
•
•
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
12-10
Configure the primary VMPS server IP address:
Console> (enable) set vmps server 172.20.26.150 primary
Configure the secondary VMPS server IP addresses:
Console> (enable) set vmps server 172.20.26.152
Console> (enable) set vmps server 172.20.26.159
Verify the VMPS server addresses:
Console> (enable) show vmps server
Auxiliary VLAN—Separate VLAN for IP phones
Native VLAN—Traditional VLAN for data
Auxiliary VLAN ID—VLAN ID of an auxiliary VLAN
Native VLAN ID—VLAN ID of a native VLAN
Voice traffic to and from the IP phone (auxiliary VLAN)
Data traffic to and from the PC connected to the switch through the access port of the IP phone
(native VLAN)
Chapter 12
Configuring Dynamic Port VLAN Membership with VMPS
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