Chapter 49 VLAN
GS1920v2 Series User’s Guide
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The following table describes the labels in this screen.
49.9 Protocol Based VLAN
Protocol based VLANs allow you to group traffic into logical VLANs based on the protocol you specify.
When an upstream frame is received on a port (configured for a protocol based VLAN), the Switch
checks if a tag is added already and its protocol. The untagged packets of the same protocol are then
placed in the same protocol based VLAN. One advantage of using protocol based VLANs is that priority
can be assigned to traffic of the same protocol.
Note: Protocol-based VLAN applies to un-tagged packets and is applicable only when you
use IEEE 802.1Q tagged VLAN.
For example, port 1, 2, 3 and 4 belong to static VLAN 100, and port 4, 5, 6, 7 belong to static VLAN 120.
You configure a protocol based VLAN A with priority 3 for ARP traffic received on port 1, 2 and 3. You
also have a protocol based VLAN B with priority 2 for Apple Talk traffic received on port 6 and 7. All
upstream ARP traffic from port 1, 2 and 3 will be grouped together, and all upstream Apple Talk traffic
from port 6 and 7 will be in another group and have higher priority than ARP traffic, when they go
through the uplink port to a backbone switch C.
Table 164 SWITCHING > VLAN > Subnet Based VLAN Setup > Add/Edit
LABEL DESCRIPTION
Active Enable the switch button to activate the IP subnet VLAN you are creating or editing.
Name Enter up to 32 alphanumeric characters to identify this subnet based VLAN. The string should
not contain [ ? ], [ | ], [ ' ], [ " ] or [ , ].
IP Enter the IP address of the subnet for which you want to configure this subnet based VLAN.
Mask-Bits Enter the bit number of the subnet mask. To find the bit number, convert the subnet mask to
binary format and add all the 1’s together. Take “255.255.255.0” for example. 255 converts to
eight 1s in binary. There are three 255s, so add three eights together and you get the bit
number (24).
VID Enter the ID of a VLAN with which the untagged frames from the IP subnet specified in this
subnet based VLAN are tagged. This must be an existing VLAN which you defined in the
SWITCHING > VLAN screens.
VLAN Enter the ID of a VLAN with which the untagged frames from the IP subnet specified in this
subnet based VLAN are tagged. This must be an existing VLAN which you defined in the
SWITCHING > VLAN > VLAN Setup > Static VLAN screen.
Priority Select the priority level that the Switch assigns to frames belonging to this VLAN.
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.
Clear Click Clear to clear the fields to the factory defaults.
Cancel Click Cancel to not save the configuration you make and return to the last screen.
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