Dynamic Port Vlan Membership With Auxiliary Vlans; Configuration Guidelines; Configuring Dynamic Port Vlan Membership With Auxiliary Vlans - Cisco WS-C2948G-GE-TX Configuration Manual

Dynamic Port VLAN Membership with Auxiliary VLANs

Dynamic Port VLAN Membership with Auxiliary VLANs
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 release 6.2(1) and later releases, the dynamic ports can belong to two VLANs. The switch
port that is configured for connecting an IP phone can have separate VLANs that are configured for
carrying the following:
•
•

Configuration Guidelines

This section lists the guidelines for configuring dynamic port VLAN membership for auxiliary VLANs:
•
•
•
•
•

Configuring Dynamic Port VLAN Membership with Auxiliary VLANs

This example shows how to add voice ports to auxiliary VLANs and specify an encapsulation type:
Console> (enable) set port auxiliaryvlan 5/9 222
Auxiliaryvlan 222 configuration successful.
AuxiliaryVlan AuxVlanStatus Mod/Ports
------------- ------------- -------------------------
222
Console> (enable)
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2948G-GE-TX, and Catalyst 2980G Switches Software Configuration Guide—Release 8.2GLX
12-14
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 that is connected to the switch through the access port of the IP
phone (native VLAN)
Read the "Configuration Guidelines for Dynamic Ports and VMPS" section on page 12-3
begin the configuration.
Configuration of the native VLAN ID is dynamic for the PC that is connected to the access port of the
IP phone. Configuration of the auxiliary VLAN ID is not dynamic; you need to configure it manually.
As you manually configure the auxiliary VLAN ID, the VMPS server is queried for packets coming from
the PC, but not for packets coming from the IP phone.
All packets, except the CDP packets from the IP phone, are tagged with the auxiliary VLAN ID. All
such tagged packets are considered to be packets from the phone, and all other packets are
considered to be packets from the PC.
When configuring the auxiliary VLAN ID with untagged frames, you need to configure the VMPS
server with the IP phone's MAC address (see the
information on configuring VMPS).
For dynamic ports, the auxiliary VLAN ID cannot be the same as the native VLAN ID that is
assigned by VMPS for the dynamic port.
active
Chapter 12
"VMPS Example" section on page 12-11
5/9
Configuring Dynamic VLAN Membership with VMPS
before you
for
78-15908-01