Vivotek AW-GEV-264A Series, Руководство пользователя

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User Manual rev. 1.2. Aug. 2015
139
On ingress, frames with a VLAN tag with TPID = 0x8100 get classified to the VLAN ID embedded in
the tag. If a frame is untagged or priority tagged, the frame gets classified to the Port VLAN. If frames
must be tagged on egress, they will be tagged with a C-tag.
S-Port:
On ingress, frames with a VLAN tag with TPID = 0x8100 or 0x88A8 get classified to the VLAN ID
embedded in the tag. If a frame is untagged or priority tagged, the frame gets classified to the Port
VLAN. If frames must be tagged on egress, they will be tagged with an S-tag.
S-Custom-Port:
On ingress, frames with a VLAN tag with a TPID = 0x8100 or equal to the Ethertype configured for
Custom-S ports
get classified to the VLAN ID embedded in the tag. If a frame is untagged or priority
tagged, the frame gets classified to the Port VLAN. If frames must be tagged on egress, they will be
tagged with the custom S-tag.

Ingress Filtering :
Hybrid ports allow for changing ingress filtering. Access and Trunk ports always have ingress filtering
enabled.
If ingress filtering is enabled (checkbox is checked), frames classified to a VLAN that the port is not a
member of get discarded.
If ingress filtering is disabled, frames classified to a VLAN that the port is not a member of are
accepted and forwarded to the switch engine. However, the port will never transmit frames classified
to VLANs that it is not a member of.

VLAN Trunking :
Trunk and Hybrid ports allow for enabling VLAN trunking.
When VLAN trunking is enabled, frames classified to unknown VLANs are accepted on the port
whether ingress filtering is enabled or not.
This is useful in scenarios where a cloud of intermediary switches must bridge VLANs that haven't
been created. By configuring the ports that connect the cloud of switches as trunking ports, they can
seemlessly carry those VLANs from one end to the other.

Ingress Acceptance :
Hybrid ports allow for changing the type of frames that are accepted on ingress.
Tagged and Untagged
Both tagged and untagged frames are accepted.
Tagged Only
Only tagged frames are accepted on ingress. Untagged frames are discarded.
Untagged Only
Only untagged frames are accepted on ingress. Tagged frames are discarded.

Egress Tagging :
Ports in Trunk and Hybrid mode may control the tagging of frames on egress.
Untag Port VLAN
Frames classified to the Port VLAN are transmitted untagged. Other frames are transmitted with the
relevant tag.
Tag All
All frames, whether classified to the Port VLAN or not, are transmitted with a tag.
Untag All
All frames, whether classified to the Port VLAN or not, are transmitted without a tag.
This option is only available for ports in Hybrid mode.

Allowed VLANs :
Ports in Trunk and Hybrid mode may control which VLANs they are allowed to become members of.
Access ports can only be member of one VLAN, the Access VLAN.
The field's syntax is identical to the syntax used in the
Existing VLANs field. By default, a port may
become member of all possible VLANs, and is therefore set to
1
-
4095
.
The field may be left empty, which means that the port will not be member of any of the existing
VLANs, but if it is configured for
VLAN Trunking
it will still be able to carry all unknown VLANs.

Forbidden VLANs :
A port may be configured to never be member of one or more VLANs. This is particularly useful when