3 Configuring the Switch

Configuring Uplink and Downlink Ports

Use the Private VLAN Link Status page to set ports as downlink or uplink ports. Ports designated as downlink ports can not communicate with any other ports on the switch except for the uplink ports. Uplink ports can communicate with any other ports on the switch and with any designated downlink ports.

Web – Click VLAN, Private VLAN, Link Status. Mark the ports that will serve as uplinks and downlinks for the private VLAN, then click Apply.

Figure 3-82 Private VLAN Link Status

CLI – This configures port 3 as an uplink and port 5 and 6 as downlinks.

Console(config)#pvlan up-link ethernet 1/3 down-link ethernet 1/5

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Console(config)#pvlan up-link ethernet 1/3 down-link ethernet 1/6

 

Console(config)#end

 

Console#show pvlan

 

Private VLAN status: Enabled

 

Up-link port:

 

Ethernet

1/3

 

Down-link

port:

 

Ethernet

1/5

 

Ethernet

1/6

 

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 being used by the inbound packets.

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