VLAN
VLAN – Configuration
Microsemi PDS-408G Web Management User Guide Ver. 1.0.1, 03-2019
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Figure 6-4: VLAN 802.1ad Q-in-Q double VLAN tagging
6.2.3
Port VLAN Configuration
Figure 6-5: Port VLAN configuration
Port
: Switch Ethernet port number
Mode
: The Mode field controls the basic VLAN functionality of the port mode (default is Access). A port
can be configured to one out of three modes as described below. Whenever a particular mode is
selected, the remaining Page fields for that port will be either grayed out or changeable depending on
the mode being configured. Grayed out fields show the value that the port will get when the appropriate
mode will be applied.
•
Access
: Access ports are normally used to connect end devices which are VLAN unaware.
Access ports have the following characteristics:
o
Member of exactly one VLAN as configured in the Port VLAN field. Default Access VLAN is 1
o
Accepts untagged and C-tagged frames.
o
Discards all frames that are not classified to the Access VLAN.
o
On egress all frames are transmitted untagged
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•
Trunk
: Trunk ports can carry traffic of multiple VLANs simultaneously. Trunk mode is usually in
use whenever there is a need to connect one Switch using multiple VLANs to another Switch.
Trunk ports have the following characteristics:
o
By default, a trunk port is member of all VLANs (1-4095) unless defined otherwise by an
Allowed VLANs field. In this case none members VLANs are discarded.
o
By default, all frames except frames classified to the Port VLAN (also called as Native VLAN)
get tagged on egress. Frames classified to the Port VLAN do not get C-tagged on egress.
o
Egress tagging can be changed to tag all frames, in which case only tagged frames are
accepted on ingress.