Chapter 9 VLAN
XS1920 Series User’s Guide
102
9.7 Subnet Based VLANs
Subnet based VLANs allow you to group traffic into logical VLANs based on the source IP subnet you
specify. When a frame is received on a port, the Switch checks if a tag is added already and the IP
subnet it came from. The untagged packets from the same IP subnet are then placed in the same
subnet based VLAN. One advantage of using subnet based VLANs is that priority can be assigned to
traffic from the same IP subnet.
For example, an ISP (Internet Services Provider) may divide different types of services it provides
to customers into different IP subnets. Traffic for voice services is designated for IP subnet
172.16.1.0/24, video for 192.168.1.0/24 and data for 10.1.1.0/24. The Switch can then be
configured to group incoming traffic based on the source IP subnet of incoming frames.
You configure a subnet based VLAN with priority 6 and VID of 100 for traffic received from IP subnet
172.16.1.0/24 (voice services). You also have a subnet based VLAN with priority 5 and VID of 200
for traffic received from IP subnet 192.168.1.0/24 (video services). Lastly, you configure VLAN with
priority 3 and VID of 300 for traffic received from IP subnet 10.1.1.0/24 (data services). All
untagged incoming frames will be classified based on their source IP subnet and prioritized
accordingly. That is video services receive the highest priority and data the lowest.
Acceptable Frame
Type
Specify the type of frames allowed on a port. Choices are
All
,
Tag Only
and
Untag Only
.
Select
All
from the drop-down list box to accept all untagged or tagged frames on this
port. This is the default setting.
Select
Tag Only
to accept only tagged frames on this port. All untagged frames will be
dropped.
Select
Untag Only
to accept only untagged frames on this port. All tagged frames will be
dropped.
VLAN Trunking
Enable
VLAN Trunking
on ports connected to other switches or routers (but not ports
directly connected to end users) to allow frames belonging to unknown VLAN groups to
pass through the Switch.
Isolation
Select this to allows this port to communicate only with the CPU management port and
the ports on which the isolation feature is not enabled.
Apply
Click
Apply
to save your changes to the Switch’s run-time memory. The Switch loses
these changes if it is turned off or loses power, so use the
Save
link on the top navigation
panel to save your changes to the non-volatile memory when you are done configuring.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Table 39
Advanced Application > VLAN > VLAN Configuration > VLAN Port Setup (continued)
LABEL
DESCRIPTION
Summary of Contents for XS1920 Series
Page 18: ...18 PART I User s Guide ...
Page 32: ...32 PART II Technical Reference ...
Page 177: ...Chapter 21 Classifier XS1920 Series User s Guide 177 Figure 122 Classifier Example EXAMPLE ...
Page 408: ...Appendix C IPv6 XS1920 Series User s Guide 408 ...
Page 412: ...Appendix D Legal Information XS1920 Series User s Guide 412 Environmental Product Declaration ...