| Description | This table defines the translations performed on QinQ capable
interfaces.
The ifIndex in the INDEX clause identifies the QinQ interface.
A QinQ interface performs the following translations:
- Double Tagged to Single Tagged - the inner and outer tags of
the frames internal to the switch are replaced with a single
trunk VLAN tag when the outgoing frame is transmitted.
- Double Tagged to Double Tagged - the outer tag of the frames
internal to the switch are replaced with an outer trunk
VLAN tag when the outgoing frame is transmitted. The inner
tag remains unchanged in the transmitted frame.
The following picture illustrates QinQ translations.
<----- Provider Side -----|----- Customer Side ----->
Switch
+--------------------------------+
| |
| +---------------+ +-------| +------------------+
| | Double Tagged | | QinQ | | Single or Double |
| | Frames | --> | Intf | --> | Tagged Frames |
| +---------------+ +-------| +------------------+
| |
+--------------------------------+
Also, the QinQ interface sets the IEEE 802.1P prioritization
bits (P bits) in the outgoing frames by copying the P bits
either from the internal frame's outer or inner VLAN tag.
A management application can create a conceptual row in this
table by setting the cqvTranslationRowStatus to
'createAndWait' or 'createAndGo'.
A conceptual row in this table cannot be modified while
cqvTranslationRowStatus is set to 'active'. |