ifs NS4702-24P-4X-V2 User Manual page 143

Object
Port
Mode Access
Trunk
Hybrid
Port VLAN
NS4702-24P-4X-V2 Managed Switch User Manual
Description
This is the logical port number for this row.
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 (Access VLAN),
which by default is 1.
• Accepts untagged and C-tagged frames.
• Discards all frames that are not classified to the Access VLAN.
• On egress, all frames classified to the Access VLAN are
transmitted untagged. Other (dynamically added VLANs) are
transmitted tagged.
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 ports resemble trunk ports in many ways, but add 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.
Determines the port's VLAN ID (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).
• On egress, frames classified to the Port VLAN do not get
tagged if Egress Tagging configuration is set to untag Port
VLAN.
The Port VLAN is called an "Access VLAN" for ports in Access
mode and Native VLAN for ports in Trunk or Hybrid mode.
Chapter 4: Web configuration
139