Cisco Catalyst Blade Switch 3130 Reference Manual page 729

Chapter 2 Cisco Catalyst Blade Switch 3130 for Dell Cisco IOS Commands
We strongly recommend that you enable spanning tree Port Fast and bridge-protocol-data-unit (BPDU)
guard on isolated and community host ports to prevent STP loops due to misconfigurations and to speed
up STP convergence.
If you configure a port as a private-VLAN host port and you do not configure a valid private-VLAN
association by using the switchport private-vlan host-association interface configuration command,
the interface becomes inactive.
If you configure a port as a private-VLAN promiscuous port and you do not configure a valid private
VLAN mapping by using the switchport private-vlan mapping interface configuration command, the
interface becomes inactive.
Examples This example shows how to configure an interface as a private-VLAN host port and associate it to
primary VLAN 20. The interface is a member of secondary isolated VLAN 501 and primary VLAN 20.
Note When you configure a port as a private VLAN host port, you should also enable BPDU guard and Port
Fast by using the spanning-tree portfast bpduguard default global configuration command and the
spanning-tree portfast interface configuration command.
Switch# configure terminal
Switch(config)# interface gigabitethernet 1/0/1
Switch(config-if)# switchport mode private-vlan host
Switch(config-if)# switchport private-vlan host-association 20 501
Switch(config-if)# end
This example shows how to configure an interface as a private VLAN promiscuous port and map it to a
private VLAN. The interface is a member of primary VLAN 20 and secondary VLANs 501 to 503 are
mapped to it.
Switch# configure terminal
Switch(config)# interface gigabitethernet 1/0/2
Switch(config-if)# switchport mode private-vlan promiscuous
Switch(config-if)# switchport private-vlan mapping 20 501-503
Switch(config-if)# end
You can verify private VLAN switchport mode by using the show interfaces interface-id switchport
privileged EXEC command.
Related Commands Command
private-vlan
show interfaces
switchport private-vlan
OL-13271-01
Description
Configures a VLAN as a community, isolated, or primary VLAN or
associates a primary VLAN with secondary VLANs.
switchport Displays the administrative and operational status of a switching
(nonrouting) port, including private VLAN configuration.
Configures private VLAN associations and mappings between
primary and secondary VLANs on an interface.
Cisco Catalyst Blade Switch 3130 for Dell Command Reference
switchport mode private-vlan
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