Chủ Nhật, 23 tháng 6, 2013
Port Type Switch DrayTek
Port can be one of the
following types: Unaware, C-port, S-port, and
S-custom-port.
Ingress action
|
Egress action
|
|
Unaware
|
When the port
received untagged frames, an untagged frame obtain a tag (based on PVID) and
is forwarded.
When the port
received tagged frames :
No matter which is
TPID value, it will add one outer tag that is PVID , and is forwarded.
|
The TPID of
frame transmitted by Unaware port will be set to 0x8100.
The final status
of the frame after egressing are also effected by Egress Rule.
|
C-port
|
When the port
received untagged frames, an untagged frame obtain a tag (based on PVID) and
is forwarded.
When the port
received tagged frames :
1.
if
an tagged frame with TPID=0x8100, it is forwarded. (not add tag)
2.
if
an tagged frame with TPID is not 0x8100,and not Ox88a8 , and not Ethertype ,
it is forwarded.( will add one outer tag that is PVID)
3. if the TPID of tagged frame is 0x88A8 or
Ethertype, 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 obtain a tag (based on PVID) and
is forwarded.
When the port
received tagged frames:
1.
Only
the TPID of tagged frame is 0x8100, it will be discarded , others TPID will
be forwarded.
2.
This
mode will not add tag.
|
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 obtain a tag (based on PVID) and
is forwarded.
When the port
received tagged frames :
1.
Only
the TPID of tagged frame is 0x8100, it will be discarded , others TPID will
be forwarded.
2.
This
mode will not add tag.
|
The TPID of
frame transmitted by S-custom-port will be set to an self-customized value,
which can be set by the user using the column of Ethertype for Custom S-ports.
|
Port type - Ingress sample ( each arrow
color represents its operate behavior to
individual packet)
S-custom-port is used for user defined
TPID .While Ethertype for Custom S-ports
is configured to 8888 , outgoing packet will bring with TPID 8888 tag .
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