Chapter 5
Setup and Configuration
RUGGEDCOM RSG2488
User Guide
114 Forbidden Ports List
Section 5.1.1.6
Forbidden Ports List
Each VLAN can be configured to exclude ports from membership in the VLAN using the forbidden ports list. For
more information, refer to Section 5.1.4.2, “Adding a Static VLAN”.
Section 5.1.1.7
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.
The use of creative bridge filtering and multiple VLANs can carve seemingly unified IP subnets into multiple
regions policed by different security/access policies.
Multi-VLAN hosts can assign different traffic types to different VLANs.
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4
5
3
1
2
Figure 74: Multiple Overlapping VLANs
1. VLAN 2. Switch
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