Install guide

30 Release Note
Rapier Switch Software Release 2.1.0
C613-10200-01 Rev A
admitted. The switch only forwards the frame over those ports that belong to
the VLAN specified by this VID. When the switch forwards a frame over a port
to another VLAN-aware device (for instance, another switch), it adds a VLAN
tag (the same VID) to the frame. When it forwards the frame over a port to a
VLAN-unaware device, it transmits it as a VLAN-untagged frame, not
including the VID in the frame.
VLANs to be used with VLAN tags are created and destroyed in the same way
as VLANs with only untagged ports, with the commands:
CREATE VLAN=vlanname VID=2..4094
DESTROY VLAN={vlanname|2..4094|ALL}
A tagged VLAN may have VLAN-aware devices connected to some ports that
require VLAN tags and legacy devices connected to other ports that cannot
accept VLAN tags. Whether VLAN tagged or untagged frames are transmitted
on a port to members of a particular VLAN is determined when the ports are
added to that VLAN. Ports are added to and deleted from VLANs with these
commands:
ADD VLAN={vlanname|2..4094} PORT=port-list
[FRAME=TAGGED|UNTAGGED]
DELETE VLAN={vlanname|2..4094} PORT=port-list
The FRAME parameter specifies whether VLAN tag headers are included in
frames transmitted on the specified ports. If TAGGED is specified, a VLAN tag
is added to frames prior to transmission. The port is then called a tagged port
for this VLAN. If UNTAGGED is specified, the frame is transmitted without a
VLAN tag. The port is then called an untagged port for this VLAN. A port can
be untagged for one and only one of the VLANs to which it belongs, or for
none of the VLANs to which it belongs. A port can have the FRAME parameter
set to TAGGED for zero or more VLANs to which it belongs. It is not possible
to add an untagged port to a VLAN if the port is already present in any other
port-based VLAN except the default VLAN. If the port is an untagged member
of the default VLAN, adding it untagged to another VLAN deletes it from the
default VLAN. The default setting is UNTAGGED.
A port can be tagged (send VLAN tagged frames) for some VLANs, and
untagged for one VLAN. A VLAN can have both tagged and untagged ports.
But a particular port cannot receive and send both tagged and untagged frames
for the same VLAN (that is, it cannot be added to the same VLAN as both a
tagged and an untagged port).
Figure 12 shows a network that must be configured with VLAN tagging, since
the server on port 2 on Switch A belongs to both the Admin and Marketing
VLANs. Using VLAN tags, port 25 on Switch A and port 26 belong to both the
Marketing VLAN and the Training VLAN, so devices on both VLANs can use
this uplink.
Note that ports tagged for some VLANs and left in the default VLAN as untagged ports
will transmit broadcast traffic for the default VLAN. If this is not required, the
unnecessary traffic in the switch can be reduced by actively creating another VLAN on
the switch and adding the untagged ports that are intended to be active to it, so that they
no longer generate broadcast traffic to the default VLAN.