User guide
RUGGEDCOM ROS
User Guide
Chapter 5
Setup and Configuration
PVLAN Edge 125
• Ports A1, B1 to B4, C1, D1, D2 and E1 are GVRP aware
• Ports B1 to B4, D1 and D2 are set to advertise and learn
• Ports A1, C1 and E1 are set to advertise only
• Ports A2, C2 and E2 are edge ports
• End node D is GVRP aware
• End nodes A, E and C are GVRP unaware
• Ports A2 and C2 are configured with PVID 7
• Port E2 is configured with PVID 20
• End node D is interested in VLAN 20, hence VLAN 20 is advertised by it towards switch D
• D2 becomes a member of VLAN 20
• Ports A1 and C1 advertise VID 7
• Ports B1 and B2 become members of VLAN 7
• Ports B1, B2 and D1 advertise VID 20
• Ports B3, B4 and D1 become members of VLAN 20
For more information about how to configure GVRP, refer to Section 5.2.4, “Configuring VLANs for Specific
Ethernet Ports”.
Section 5.2.1.9
PVLAN Edge
Private VLAN (PVLAN) Edge isolates multiple VLAN Edge ports from each other on a single device. When VLAN
Edge ports are configured as protected, they are prohibited from sending frames to one another, but are still
permitted to send frames to other, non-protected ports within the same VLAN. This protection extends to all traffic
on the VLAN, including unicast, multicast and broadcast traffic.
For more information about how to configure a port as protected, refer to Section 5.2.4, “Configuring VLANs for
Specific Ethernet Ports”.
NOTE
This feature is strictly local to the switch. PVLAN Edge ports are not prevented from communicating
with ports outside of the switch, whether protected (remotely) or not.
Section 5.2.1.10
VLAN Advantages
The following are a few of the advantages offered by VLANs.
Traffic Domain Isolation
VLANs are most often used for their ability to restrict traffic flows between groups of devices.
Unnecessary broadcast traffic can be restricted to the VLAN that requires it. Broadcast storms in one VLAN need
not affect users in other VLANs.
Hosts on one VLAN can be prevented from accidentally or deliberately assuming the IP address of a host on
another VLAN.