
VLAN
VLAN – Configuration
Microsemi PDS-408G Web Management User Guide Ver. 1.0.1, 03-2019
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Term
Description
Hybrid-Mode
(general)
Hybrid-Mode is an extension of Trunk-Mode. The difference between Hybrid-Mode and
Trunk-Mode is more configuration changes of additional parameters as Port-Type,
Ingress-Filtering, etc. (described in more detail below).
Hybrid
Ingress (Rx)
Filtering
In Hybrid mode it is possible to enable/disable Rx packets
filtering based on VLAN header presence. The following
options are available:
Tagged and Untagged: accept both tagged and
untagged frames.
Tagged Only: accept only tagged frames. Discard
Untagged frames.
Untagged Only: accept only untagged frames.
Discard Tagged frames.
NOTE:
Ingress filter is inactive (accept all) when the port is
configured as Hybrid
Unaware.
Hybrid/Trunk
Egress (Tx)
Tagging
- Port
VLAN=5
Ports in Trunk and Hybrid mode may control the tagging of frames on
egress.
Untag Port VLAN: Remove VLAN tagging only for port VLAN
(VLAN-5 in this example). Leave all other VLAN tags
unchanged. This apply to both VLAN TPID 0x88A8 and 0x8100.
.
Tagged All: all frames, whether classified to the Port VLAN
(VLAN-5) or not, are transmitted with a tag.
Untagged All (only Hybrid mode): All frames, whether classified
to the Port VLAN (VLAN-5) or not, are transmitted without a tag
NOTE:
VLAN double tagging will become single tagged.
Switch port
config
Hybrid-Mode
- Port Type=
Unaware
- Port
VLAN=5
On ingress (Rx), all frames (whether carrying a VLAN tag or not) are classified to the
Port
VLAN (VLAN-5 in this example). Possible tags are not removed on egress (Tx).
Rx tags all incoming packets as VLAN-5 even if Rx packet is already tagged. In
case packet is tagged with TPID=0x8100, it will be 0x8100 double tagged.
For example Rx packet with VLAN-10 will become 0x8100,0x0005,0x8100,0x000A
TX does not untag any transmitted packet
Switch port
config
Hybrid-Mode
- Port Type=
C-Port
- Port
VLAN=5
On ingress (Rx), frames with a VLAN tag with TPID = 0x8100 are classified to the
VLAN ID
embedded in the tag. If a frame is untagged or priority tagged, the frame gets classified.
Rx path:
o
Rx VLAN-2 (an example), Tx to another Trunk port as VLAN-2, also any
Access Port VLAN-2.