4 Command Line Interface

show pvlan

This command displays the configured private VLAN.

Command Mode

Privileged Exec

Example

Console#show pvlan

Private VLAN status: Enabled

Up-link port:

Ethernet

1/4

Down-link

port:

Ethernet

1/5

Ethernet

1/6

Ethernet

1/7

Ethernet

1/8

Console#

 

Configuring Protocol-based VLANs

The network devices required to support multiple protocols cannot be easily grouped into a common VLAN. This may require non-standard devices to pass traffic between different VLANs in order to encompass all the devices participating in a specific protocol. This kind of configuration deprives users of the basic benefits of VLANs, including security and easy accessibility.

To avoid these problems, you can configure this switch with protocol-based VLANs that divide the physical network into logical VLAN groups for each required protocol. When a frame is received at a port, its VLAN membership can then be determined based on the protocol type in use by the inbound packets.

Table 4-60 Protocol-based VLAN Commands

Command

Function

Mode

Page

 

 

 

 

protocol-vlan protocol-group

Create a protocol group, specifying the supported protocols

GC

4-179

 

 

 

 

protocol-vlan protocol-group

Maps a protocol group to a VLAN

IC

4-179

 

 

 

 

show protocol-vlan

Shows the configuration of protocol groups

PE

4-180

protocol-group

 

 

 

show interfaces

Shows the interfaces mapped to a protocol group and the

PE

4-181

protocol-vlan protocol-group

corresponding VLAN

 

 

To configure protocol-based VLANs, follow these steps:

1.First configure VLAN groups for the protocols you want to use (page 4-169). Although not mandatory, we suggest configuring a separate VLAN for each major protocol running on your network. Do not add port members at this time.

2.Create a protocol group for each of the protocols you want to assign to a VLAN using the protocol-vlan protocol-group command (General Configuration mode).

3.Then map the protocol for each interface to the appropriate VLAN using the protocol-vlan protocol-group command (Interface Configuration mode).

4-178