Administrator Guide

4 Select the PVLAN mode.
INTERFACE mode
switchport mode private-vlan {host | promiscuous | trunk}
• host (isolated or community VLAN port)
• promiscuous (intra-VLAN communication port)
• trunk (inter-switch PVLAN hub port)
5 Access INTERFACE VLAN mode for the VLAN to which you want to assign the PVLAN interfaces.
CONFIGURATION mode
interface vlan vlan-id
6 Enable the VLAN.
INTERFACE VLAN mode
no shutdown
7 To obtain maximum VLT resiliency, configure the PVLAN IDs and mappings to be identical on both the
VLT peer nodes. Set the PVLAN mode of the selected VLAN to primary.
INTERFACE VLAN mode
private-vlan mode primary
8 Map secondary VLANs to the selected primary VLAN.
INTERFACE VLAN mode
private-vlan mapping secondary-vlan vlan-list
The list of secondary VLANs can be:
• Specified in comma-delimited (VLAN-ID,VLAN-ID) or hyphenated-range format (VLAN-ID-
VLAN-ID).
• Specified with this command even before they have been created.
• Amended by specifying the new secondary VLAN to be added to the list.
Proxy ARP Capability on VLT Peer
Nodes
A proxy ARP-enabled device answers the ARP requests that are destined for another host or router. The local
host forwards the traffic to the proxy ARP-enabled device, which in turn transmits the packets to the
destination.
By default, proxy ARP is enabled. To disable proxy ARP, use the no proxy-arp command in the interface
mode. To re-enable proxy ARP, use the ip proxy-arp command in INTERFACE mode. To view if proxy ARP
is enabled on the interface, use the show config command in INTERFACE mode. If it is not listed in the
show config command output, it is enabled. Only nondefault information is displayed in the show config
command output.
ARP proxy operation is performed on the VLT peer node IP address when the peer VLT node is down. The
ARP proxy stops working either when the peer routing timer expires or when the peer VLT node goes up.
Virtual Link Trunking (VLT) 996