Publication date: Sept, 2015
Revision A1
151
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 seamlessly 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 a
member of all possible VLANs, and is 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 a member of one or more VLANs. This is particularly useful when
dynamic VLAN protocols like MVRP and GVRP must be prevented from dynamically adding ports to VLANs.
The trick is to mark such VLANs as forbidden on the port in question. The syntax is identical to the syntax used
in the
Existing VLANs
field. By default, the field is left blank, which means that the port may become a
member of all possible VLANs.
Summary of Contents for LPB2910A
Page 7: ...Publication date Sept 2015 Revision A1 ii ...
Page 65: ...Publication date Sept 2015 Revision A1 53 SMTP Enable Select this Group Name in SMTP ...
Page 69: ...Publication date Sept 2015 Revision A1 57 The number of data to be saved in the RMON ...
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Page 278: ...Publication date Sept 2015 Revision A1 266 Refresh Click to refresh the page ...
Page 365: ...Page 353 Figure 9 21 Restore Configuration option ...