Reference Guide

Private VLAN Configuration Example
The following example shows a private VLAN topology.
Figure 106. Sample Private VLAN Topology
The following configuration is based on the example diagram for the S5000–1:
• TenGig 0/0 and TenGig 23 are configured as promiscuous ports, assigned to the primary VLAN, VLAN
4000.
• TenGig 0/25 is configured as a PVLAN trunk port, also assigned to the primary VLAN 4000.
• TenGig 0/24 and TenGig 0/47 are configured as host ports and assigned to the isolated VLAN, VLAN
4003.
• TenGig 4/0 and TenGig 23 are configured as host ports and assigned to the community VLAN, VLAN
4001.
• TenGig 4/24 and TenGig 4/47 are configured as host ports and assigned to community VLAN 4002.
The result is that:
• 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.
In parallel, on S5000-2:
724
Private VLANs (PVLAN)