Alcatel-Lucent 6850-48 Guida Di Rete

Defining VLAN Rules

VLAN Rules Overview

OmniSwitch AOS Release 6 Network Configuration Guide

page 8-7

Port rules are fundamentally different from all other supported rule types, in that traffic is not required to 
trigger dynamic assignment of the mobile port to a VLAN. As soon as this type of rule is created, the 
specified port is assigned to the VLAN only for the purpose of forwarding broadcast types of VLAN traf-
fic to a device connected to that same port.

Port rules are mostly used for silent devices, such as printers, that require VLAN membership to receive 
traffic forwarded from the VLAN. These devices usually don’t send traffic, so they do not trigger dynamic 
assignment of their mobile ports to a VLAN. 

It is also possible to specify the same port in more than one port rule defined for different VLANs. The 
advantage to this is that traffic from multiple VLANs is forwarded out the one mobile port to the silent 
device. For example, if port 3 on slot 2 is specified in a port rule defined for VLANs 255, 355, and 755, 
then outgoing traffic from all three of these VLANs is forwarded on port 2/3.

Port rules only apply to outgoing mobile port traffic and do not classify incoming traffic. If a mobile port 
is specified in a port rule, its incoming traffic is still classified for VLAN assignment in the same manner 
as all other mobile port traffic. 

VLAN assignments that are defined using port rules are exempt from the port’s default VLAN restore 
status. See 

 for more information regarding a port’s default 

VLAN restore status and other mobile port properties.