VPRN Service Configuration Commands
Page 1312 7750 SR OS Services Guide
The dot1p dot1p-value command must be configured without the qinq-mark-top-only parameter to
remove the TopQ PBits only marking restriction.
Null Dot1P (VLAN-ID 0) Dot1P PBits
Null Dot1Q Dot1Q PBits
Null TopQ BottomQ BottomQ PBits
Null TopQ (No BottomQ) TopQ PBits
Dot1Q None (Default SAP) None
Dot1Q Dot1P (Default SAP VLAN-ID 0) Dot1P PBits
Dot1Q Dot1Q Dot1Q PBits
QinQ / TopQ TopQ TopQ PBits
QinQ / TopQ TopQ BottomQ BottomQ PBits
QinQ / QinQ TopQ BottomQ BottomQ PBits
Egress SAP Type Ingress Packet Preserved
Dot1P State
Marked (or Remarked)
PBits
Null
No preserved Dot1P bits None
Null
Preserved Dot1P bits Preserved tag PBits remarked
using dot1p-value
Dot1Q
No preserved Dot1P bits New PBits marked using
dot1p-value
Dot1Q
Preserved Dot1P bits Preserved tag PBits remarked
using dot1p-value
TopQ
No preserved Dot1P bits TopQ PBits marked using
dot1p-value
TopQ
Preserved Dot1P bits (used as TopQ
and BottomQ PBits)
TopQ PBits marked using
dot1p-value, BottomQ PBits
preserved
QinQ
No preserved Dot1P bits TopQ PBits and BottomQ
PBits marked using dot1p-
value
QinQ
Preserved Dot1P bits (used as TopQ
and BottomQ PBits)
TopQ PBits and BottomQ
PBits marked using dot1p-
value
Table 26: Bottom Position QinQ and TopQ SAP Dot1P Evaluation (Continued)
Port / SAP Type Existing Packet Tags PBits Used for Match