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Industrial Managed
Ethernet Switch – EH9711
User Manual
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Table 2.76 Description of Global VLAN Configuration
Label
Description
Factory
Default
Allowed Access
VLANs
This field shows the allowed Access VLANs, i.e. it only affects ports configured
as Access ports. Ports in other modes are members of the VLANs specified in
the Allowed VLANs field. By default, only VLAN 1 is enabled. More VLANs may
be created by using a list syntax where the individual elements are separated by
commas. Ranges are specified with a dash separating the lower and upper bound.
The following example will create VLANs 1, 10, 11, 12, 13, 200, and 300:
1,10-
13,200,300
. Spaces are allowed in between the delimiters.
1
Ethertype for
Custom S-ports
This field specifies the ethertype/TPID (specified in hexadecimal) used for Custom
S-ports. The setting is in force for all ports whose Port Type is set to S-Custom-Port.
88A8
Table 2.77 Description of Port VLAN Configuration
Label
Description
Factory
Default
Port
This is the logical port number of this row.
-
Mode
The port mode (default is Access) determines the fundamental behaviour of the port in
question. A port can be in one of three modes as described below.
Whenever a particular mode is selected, the remaining fields in that row will be either
greyed out or made changeable depending on the mode in question.
Greyed out fields show the value that the port will get when the mode is applied.
Access:
Access ports are normally used to connect to end stations. Dynamic features like Voice
VLAN may add the port to more VLANs behind the scenes. Access ports have the
following characteristics:
Member of exactly one VLAN, the Port VLAN (a.k.a. Access VLAN), which by
default is 1
Accepts untagged and C-tagged frames
Discards all frames not classified to the Access VLAN
On egress all frames are transmitted untagged
Trunk:
Trunk ports can carry traffic on multiple VLANs simultaneously, and are normally used to
connect to other switches. Trunk ports have the following characteristics:
By default, a trunk port is member of all VLANs (1-4095)
The VLANs that a trunk port is member of may be limited by the use of Allowed
VLANs
Frames classified to a VLAN that the port is not a member of are discarded
By default, all frames but frames classified to the Port VLAN (a.k.a. Native
VLAN) get tagged on egress. Frames classified to the Port VLAN do not get C-
tagged on egress
Egress tagging can be changed to tag all frames, in which case only tagged
frames are accepted on ingress
Hybrid:
Hybrid ports resemble trunk ports in many ways, but adds additional port configuration
features. In addition to the characteristics described for trunk ports, hybrid ports have these
abilities:
Can be configured to be VLAN tag unaware, C-tag aware, S-tag aware, or S-
custom-tag aware
Ingress filtering can be controlled
Ingress acceptance of frames and configuration of egress tagging can be
configured independently
Access
Port VLAN
Determines the port's VLAN ID (a.k.a. PVID). Allowed VLANs are in the range 1 through
4095, default being 1.
On ingress, frames get classified to the Port VLAN if the port is configured as VLAN
unaware, the frame is untagged, or VLAN awareness is enabled on the port, but the frame
is priority tagged (VLAN ID = 0).
-