Dell Networking 2024 Reference Manual page 794

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Primary VLAN
Forwards the traffic from the promiscuous ports to isolated ports,
community ports and other promiscuous ports in the same private VLAN.
Only one primary VLAN can be configured per private VLAN. All ports
within a private VLAN share the same primary VLAN.
Isolated VLAN
Is a secondary VLAN. It carries traffic from isolated ports to promiscuous
ports. Only one isolated VLAN can be configured per private VLAN.
Community VLAN
Is a secondary VLAN. It forwards traffic between ports which belong to the
same community and to the promiscuous ports. There can be multiple
community VLANs per private VLAN.
Three types of port designations exist within a private VLAN:
Promiscuous port
Belongs to a primary VLAN and can communicate with all interfaces in
the private VLAN, including other promiscuous ports, community ports
and isolated ports. An endpoint connected to a promiscuous port is
allowed to communicate with any endpoint within the private VLAN.
Multiple promiscuous ports can be defined for a single private VLAN
domain.
Host port
Belongs to a secondary VLAN and depending upon the type of secondary
VLAN can either communicate with other ports in the same community
(if the secondary VLAN is the community VLAN) and with the
promiscuous ports or can communicate only with the promiscuous ports
(if the secondary VLAN is an isolated VLAN).
The Private VLANs can be extended across multiple switches through inter-
switch/stack links that transport primary, community and isolated VLANs
between devices, as shown in
794
VLAN Commands
Figure
38-1.

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