IGPS-9080 Series User Manual
ORing Industrial Networking Corp
61
Port VLAN Mode
The allowed values are
None
or
Specific
. This parameter affects
VLAN ingress and egress processing.
If
None
is selected, a VLAN tag with the classified VLAN ID is
inserted in frames transmitted on the port. This mode is normally
used for ports connected to VLAN-aware switches. Tx tag should
be set to Untag_pvid when this mode is used.
If
Specific
(the default value) is selected, a port VLAN ID can be
configured (see below). Untagged frames received on the port are
classified to the port VLAN ID. If VLAN awareness is disabled, all
frames received on the port are classified to the port VLAN ID. If
the classified VLAN ID of a frame transmitted on the port is
different from the port VLAN ID, a VLAN tag with the classified
VLAN ID will be inserted in the frame.
Port VLAN ID
Configures the VLAN identifier for the port. The allowed range of
the values is 1 through 4095. The default value is 1.
Note: The port must be a member of the same VLAN as the port
VLAN ID.
Tx Tag
Determines egress tagging of a port.
Untag_pvid
: all VLANs
except the configured PVID will be tagged.
Tag_all
: all VLANs are
tagged.
Untag_all
: all VLANs are untagged.
Introduction of Port Types
Below is a detailed description of each port type, including Unaware, C-port, S-port, and
S-custom-port.
Ingress action
Egress action
Unaware
The function of
Unaware can
be used for
802.1QinQ
(double tag).
When the port receives untagged frames, an
untagged frame obtains a tag (based on PVID)
and is forwarded.
When the port receives tagged frames:
1. If the tagged frame contains a TPID of
0x8100, it will become a double-tag frame and
will be forwarded.
2. If the TPID of tagged frame is not 0x8100
(ex. 0x88A8), it will be discarded.
The TPID of a frame
transmitted by Unaware
port will be set to
0x8100.
The final status of the
frame after egressing
will also be affected by
the Egress Rule.
C-port
When the port receives untagged frames, an
untagged frame obtains a tag (based on PVID)
The TPID of a frame
transmitted by C-port