Alcatel-Lucent 7750 SR OS Service Manual page 266

VLL Service Configuration Commands
Table 6: QinQ Mark Top Only Explicit Marking Actions
The QinQ and TopQ SAP PBit marking follows the default behavior devined in
mark-top-only is not specified.
The dot1p dot1p-value command must be configured without the qinq-mark-top-only parameter to
remove the TopQ PBits only marking restriction.
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Egress SAP
Type
TopQ No preserved Dot1P bits
TopQ Preserved Dot1P bits (used as TopQ
and BottomQ PBits)
QinQ No preserved Dot1P bits
QinQ Preserved Dot1P bits (used as TopQ
and BottomQ PBits)
Ingress Packet Preserved
Dot1P State
7750 SR OS Services Guide
Marked (or Remarked) PBits
TopQ PBits marked using dot1p-
value
TopQ PBits marked using dot1p-
value, BottomQ PBits preserved
TopQ PBits PBits marked using
dot1p-value, BottomQ PBits
marked with zero
TopQ PBits PBits marked using
dot1p-value, BottomQ PBits
marked using preserved value
Table 9 when qinq-