
VLAN
VLAN – Configuration
Microsemi PDS-408G Web Management User Guide Ver. 1.0.1, 03-2019
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Term
Description
o
Rx native (no VLAN tag), Tx to another Trunk port as VLAN-5 (port VLAN), also
any Access port configured as VLAN-5.
o
Rx priority tagged (VLAN-0), Tx to another Trunk port as VLAN-5 (port VLAN),
also any Access port configured as VLAN-5.
o
Rx from another Access port
TX path:
o
TX does not untag any transmitted packets. However, it may untag Tx packet if
its VLAN-ID is the same as Port-VLAN (VLAN-5 in this example) and Egress-
Tagging was set to Untag Port VLAN (packet will be sent as native VLAN –
untagged).
Switch port
config
Hybrid-Mode
- Port Type=
S-Port
- Port
VLAN=5
On ingress (Rx), frames with a VLAN tag with TPID = 0x8100 or 0x88A8 are classified
to the VLAN-ID embedded in the tag (first VLAN-ID in case of Q-in-Q double tagging).
If a frame is untagged (no VLAN) or priority tagged (VLAN-0), the frame gets classified
to Port VLAN (VLAN-5 in this example). If frames must be tagged on egress (Tx), they
will be tagged with an S-tag 0x88A8.
Switch port
config
Hybrid-Mode
- Port Type=
S-Custom-
Port
Same as for Hybrid S-Port except that the user may configure custom TPID different
than 0x88A8 by customizing global VLAN configuration parameter Ethertype for
Custom S-ports.
Table 6-1: VLAN terminology explained
6.2.2
Global VLAN Configuration
Allowed Access VLANs
- This field shows the allowed Access VLANs.
This field affects only ports
configured as Access ports
. Ports in other modes are members of all 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 example bellow will create VLANs 1,2,3,10. Spaces are allowed in between the delimiters.
Figure 6-3: VLAN Global configuration
Ethertype for Custom S-ports – TPID value
(specified in hexadecimal) used for Q-in-Q 802.1ad
double VLAN tagging as described in the image bellow. The default value is 0x88A8, and it applies to
all ports whose Port Type is set to S-Custom-Port.