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Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
Chapter 39 Configuring Private VLANs
Configuring PVLANs
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none A
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: 10
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations:
3 (VLAN0003) 301 (VLAN0301)
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Operational Normal VLANs: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled Capture VLANs Allowed: ALL
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none
Configuring a Layer 2 Interface as a Promiscuous PVLAN Trunk Port
To configure a Layer 2 interface as a promiscuous PVLAN trunk port, perform this task:
Note The maximum number of unique PVLAN pairs supported by the
switchport private-vlan mapping trunk command is 500. For example, 500 isolated secondary
VLANs could map to 500 primary VLANs, because only one isolated VLAN association per primary
VLAN is supported. Or, 500 community secondary VLANs could map to one primary VLAN. Or, 250
community secondary VLANs could map to 1 primary VLAN, and another 250 community secondary
VLANs could map to another primary VLAN for a total of 500 pairs.
Note By default, when you configure the mode to PVLAN trunk promiscuous, the native VLAN is set to 1.
Command Purpose
Step 1
Switch# configure terminal
Enters global configuration mode.
Step 2
Switch(config)# interface {fastethernet |
gigabitethernet | tengigabitethernet} slot/port
Specifies the LAN interface to configure.
Step 3
Switch(config-if)# switchport mode private-vlan {host
| promiscuous | trunk promiscuous | trunk [secondary]}
Configures a Layer 2 interface as a PVLAN
promiscuous trunk port.
Step 4
Switch(config-if)# [no] switchport private-vlan
mapping [trunk] primary_vlan_ID {secondary_vlan_list |
add secondary_vlan_list | remove secondary_vlan_list}
Maps the promiscuous PVLAN port to a primary
VLAN and to selected secondary VLANs.
This command offers 3 levels of removal. See the
examples that follow this table.
Step 5
Switch(config-if)# end
Exits configuration mode.
Step 6
Switch# show interfaces {fastethernet |
gigabitethernet | tengigabitethernet} slot/port
switchport
Verifies the configuration.