• The ports in community VLAN 4001 can communicate directly with each other and with promiscuous
ports.
• The ports in community VLAN 4002 can communicate directly with each other and with promiscuous
ports.
• The ports in isolated VLAN 4003 can only communicate with the promiscuous ports in the primary
VLAN 4000.
• All the ports in the secondary VLANs (both community and isolated VLANs) can only communicate
with ports in the other secondary VLANs of that PVLAN over Layer 3, and only when the ip local-
proxy-arp command is invoked in the primary VLAN.
NOTE: Even after you disable ip-local-proxy-arp (no ip-local-proxy-arp) in a secondary
VLAN, Layer 3 communication may happen between some secondary VLAN hosts, until the ARP
timeout happens on those secondary VLAN hosts.
Inspecting the Private VLAN Configuration
The standard methods of inspecting configurations also apply in PVLANs.
To inspect your PVLAN configurations, use the following commands.
• Display the specific interface configuration.
INTERFACE mode and INTERFACE VLAN mode
show config
• Inspect the running-config, and, with the grep pipe option, display a specific part of the running-
config.
show running-config | grep string
The following example shows the PVLAN parts of the running-config from the S50V switch in the
topology diagram previously shown.
• Display the type and status of the configured PVLAN interfaces.
show interfaces private-vlan [interface interface]
This command is specific to the PVLAN feature.
For more information, refer to the Security chapter in the Dell Networking OS Command Line
Reference Guide.
• Display the configured PVLANs or interfaces that are part of a PVLAN.
show vlan private-vlan [community | interface | isolated | primary |
primary_vlan | interface interface]
This command is specific to the PVLAN feature.
The following examples show the results of using this command without the command options on
the MXL switch in the topology diagram previously shown.
• Display the primary-secondary VLAN mapping. The following example shows the output from the
MXL switch.
show vlan private-vlan mapping
This command is specific to the PVLAN feature.
704 Private VLANs (PVLAN)