V3.8
OnTime Industrial Ethernet
U/R/T200 series Installation Guide
- 29 -
o
Green VLAN id
= 4
o
Yellow VLAN id
= 5
o
Brown VLAN id
= 6
o
Pink VLAN id
= 7
These VLAN id’s can be changed. Legal range is: [1..4096].
-
Layer 2 priority [0..7] for each VLAN can be set; where priority = [0..3] means low priority
and priority = [4..7] means high priority.
-
Remove tag; tag removal on egress port (i.e. on port output) can be set per port. Tag
removal is enabled per default on non-trunk ports.
The trunk ports are member of all seven VLANs, and the packet tag is kept on the packets
sent on such ports. The VLAN parameters for a trunk port cannot be changed.
The VLAN that is selected as the default VLAN for a given port will appear as a VLAN that
cannot be changed. Other Additional VLANs selected for the same port have only relevance
in case the end node connected to the same port is able to send and receive packets with
these VLAN ids.
All ports on a switch are members of the white VLAN, and this is cannot be changed. Note: an
end node can not send “white” packets unless the end node sends packets with the white
VLAN id unless the default VLAN for the port is the white VLAN.
Port 1 has the white VLAN id as the default VLAN is. This is cannot be changed. An end
node that is used for network management (SNMP or IP configuration) must always use the
white VLAN in order to communicate with the switch CPUs. Thus, the switch CPUs can
always be accessed via port 1 with untagged packets, since port 1 has the white VLAN as the
default VLAN.
Press the ‘Set’ button after any changes performed on the VLAN parameters in the VLAN
configuration dialog, while a switch restart is required in case the VLAN tick box is changed
(enable/disable VLAN). I.e. press the ‘Set’ button and then the ‘Reset’ button to restart the
Switch after a change performed on the VLAN tick box
Note 1
: all switches in the network should either be enabled or disabled for VLAN. A mix of
switches with and without VLAN support will not provide the user with the capability of tag
removal on all parts of the network.
Note 2
: CPU based MAC learning is used instead of switch core MAC learning when VLAN is
enabled. This means that MAC security is also implemented on the switch. E.g. MAC attack
prevention, see the Operator Manual for details. CPU based MAC learning with MAC security
means that packets with new source MAC addresses will not get through the switch before
the new MAC address is authorized by the switch. Thus, N packets with the new MAC
address must be sent before packets with this new MAC address will get through N VLAN
enabled switches. This property has the following practical impact on the IP configuration
tool: the user must type “Scan for switches” a few times before the complete switch list will
appear.
