User manual

User Manual
Publication date: Feb., 2013
Revision A3
132
Port can be one of the following types: Unaware, C-port, S-port, and S-custom-port.
Ingress action Egress action
Unaware
The function
of Unaware
can be used
for 802.1QinQ
(double tag).
When the port received untagged frames, an
untagged frame obtains a tag (based on PVID)
and is forwarded.
when the port received tagged frames,
1. If the tagged frame with TPID=0x8100, it
become a double-tag frame, and is forwarded.
2. If the TPID of tagged frame is not 0x8100 (ex.
0x88A8), it will be discarded.
The TPID of frame
transmitted by Unaware
port will be set to
0x8100.
C-port When the port received untagged frames, an
untagged frame obtains a tag (based on PVID)
and is forwarded.
when the port received tagged frames,
1. If a tagged frame with TPID=0x8100, it is
forwarded.
2. If the TPID of tagged frame is not 0x8100 (ex.
0x88A8), it will be discarded.
The TPID of frame
transmitted by C-port
will be set to 0x8100.
S-port When the port received untagged frames, an
untagged frame obtains a tag (based on PVID)
and is forwarded.
when the port received tagged frames,
1. If a tagged frame with TPID=0x88A8, it is
forwarded.
2. If the TPID of tagged frame is not 0x88A8 (ex.
0x8100), it will be discarded.
The TPID of frame
transmitted by S-port
will be set to 0x88A8.
S-custom-port When the port received untagged frames, an
untagged frame obtains a tag (based on PVID)
and is forwarded.
when the port received tagged frames,
1. If a tagged frame with TPID=0x88A8, it is
forwarded.
2. If the TPID of tagged frame is not 0x88A8 (ex.
0x8100), it will be discarded.
The TPID of frame
transmitted by S-
custom-port will be set
to a self-customized
value, which can be set
by the user using the
column of Ethertype for
Custom S-ports.
z Ingress Filtering :
Enable ingress filtering on a port by ticking the box. If ingress filtering is enabled and the
ingress port is not a member of the classified VLAN group of the frame, the frame is
discarded (Do not forward).
If ingress filtering is disabled and the ingress port is not a member of the classified VLAN
group of the frame, however, the frame is still forwarded.
By default, ingress filtering is disabled (untick).
z Frame Type :
Determines whether the port accepts all frames or only tagged/untagged frames. This
parameter affects VLAN ingress processing. If the port only accepts tagged frames,
untagged frames received on the port are discarded. By default, the field is set to All.
z Egress Rule :
Determines what device the port connects to. If the port connects to VLAN-unaware
devices, such as terminal/work station, Access link should be used. If the port connect to
VLAN-aware devices, for example, switch connect to switch, Trunk link should be used.
Hybrid link is used for more flexible application.
Hybrid: If the tag of tagged frame is as the same as PVID, the tag of the frame will be
removed. The frame become an untagged frame and transmitted.
Any other tagged frame whose tag value is different from PVID is transmitted directly.
Trunk: all tagged frames with any tag value are transmitted.