Promiscuous Ports; Host Ports - Allied Telesis SwitchBlade x908 Series Software Reference Manual

A host port:
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A promiscuous port:
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A private or promiscuous port:
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Promiscuous Ports

A promiscuous port can communicate with all ports that are members of its associated
secondary VLANs. Multiple promiscuous ports can exist in a primary VLAN, but only if the
primary VLAN is only associated with community VLANS (that is, that there are no isolated
VLANs associated with this port).
A promiscuous port is a member of of the primary VLAN and all associated secondary VLANs.
Its Port VID is set to the VLAN ID of the primary VLAN.

Host Ports

Host ports have two levels of connectivity depending on whether they exist in an isolated or a
community VLAN.
Host ports within an isolated VLAN
These ports are only allowed to communicate with their VLAN's promiscuous port, even
though they share their secondary (isolated) VLAN with other hosts. The host ports receive
their data from the promiscuous port via the primary VLAN, and individually transmit their data
to the promiscuous port via their common secondary VLAN.
Host ports within a community VLAN
These ports are able to communicate with both the promiscuous port and the other ports
within the community VLAN that they are associated with. They receive their data from the
promiscuous port via the primary VLAN, and transmit their data to both the promiscuous port
and the other host ports (within their community VLAN) via their common secondary VLAN.
However, the only external path from a community VLAN is from its promiscuous port.
C613-50007-01 REV B
can be a member of multiple private (community) VLANs, but all these VLANs must share
the same promiscuous port
cannot be a host port in some VLANs and a non-host port in others
cannot be a promiscuous port in another VLAN
is a member of the primary VLAN and all its associated secondary VLANs
cannot be a member of both private and non-private VLANs
may use any VLAN classification rule (port, subnet, or protocol)
Software Reference for SwitchBlade® x908, x900 and x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1
VLAN Introduction
16.9