3Com S7906E - Switch, Configuration Manual

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4-4
VLAN
operation
mode
Direction
With or without
VLAN tag
Packet processing
With VLAN tag
If the VLAN ID in the VLAN tag matches a
VLAN translation entry on the port, the
VLAN ID is replaced with the VLAN ID
corresponding to the entry, and then the
packet is forwarded.
If the VLAN ID in the tag is the default
VLAN ID of the port, the packet is
forwarded without any change.
If the VLAN ID in the tag does not match
any VLAN translation entry on the port,
the packet is dropped.
Uplink
Without VLAN tag
The packet is tagged with the default VLAN
ID and is then forwarded.
With VLAN tag
If the VLAN ID in the VLAN tag matches a
VLAN translation entry on the port, the
VLAN ID is replaced with the VLAN ID
corresponding to the entry, and then the
packet is forwarded.
If the VLAN ID in the tag is the default
VLAN ID of the port, the packet is
untagged and then forwarded.
If the VLAN ID in the tag does not match
any VLAN translation entry on the port,
the packet is dropped.
Translation
mode
Downlink
Without VLAN tag The packet is dropped.
Follow these steps to configure the VLAN operation mode for a UNI:
To do... Use the command... Remarks
Enter system view
system-view
—
Enter ONU port view
interface onu interface-number
—
Transparent
mode
uni uni-number vlan-mode transparent
Tag mode
uni uni-number vlan-mode tag vlanid
[
priority
priority-value
]
Configure
the VLAN
operation
mode of a
UNI port
Translation
mode
uni uni-number vlan-mode translation pvid pvid
[
priority priority
] {
oldvid to newvid
} &<1-15>
Optional
The default
mode is
transparent
.
If all ONU ports under an OLT port are access ports, you must set the VLAN operation mode of their
UNI ports to transparent to ensure that the packets received on the ONU ports and the end-user PCs
are untagged packets.