Cisco Catalyst 3750 Command Reference Manual page 298

private-vlan mapping
A secondary VLAN can be mapped to only one primary SVI. IF you configure the primary VLAN as a
secondary VLAN, all SVIs specified in this command are brought down.
If you configure a mapping between two VLANs that do not have a valid Layer 2 private-VLAN
association, the mapping configuration does not take effect.
Examples
This example shows how to map the interface of VLAN 20 to the SVI of VLAN 18:
Switch# configure terminal
Switch# interface vlan 18
Switch(config-if)# private-vlan mapping 20
Switch(config-vlan)# end
This example shows how to permit routing of secondary VLAN traffic from secondary VLANs 303 to
305 and 307 through VLAN 20 SVI:
Switch# configure terminal
Switch# interface vlan 20
Switch(config-if)# private-vlan mapping 303-305, 307
Switch(config-vlan)# end
You can verify your setting by entering the show interfaces private-vlan mapping privileged EXEC
command.
Related Commands Command
show interfaces
mapping
Catalyst 3750 Switch Command Reference
2-270
Description
private-vlan Display private-VLAN mapping information for the VLAN SVIs.
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
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