Alcatel-Lucent 7750 SR OS - Page 1018

VPRN Service Configuration Commands
Page 1018 7750 SR OS Services Guide
bottom — The bottom parameter is mutually exclusive to the top parameter. When the bottom
parameter is specified, the bottom most PBits are used (if existing) to match any dot1p dot1p-
value entries. Table 3 defines the dot1p evaluation behavior when the bottom parameter is
specified.
Dot1Q Dot1Q Dot1Q PBits
QinQ / TopQ TopQ TopQ PBits
QinQ / TopQ TopQ BottomQ TopQ PBits
QinQ / QinQ TopQ BottomQ TopQ PBits
Table 3: Bottom Position QinQ and TopQ SAP Dot1P Evaluation
Port / SAP Type Existing Packet Tags PBits Used for Match
Null None None
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
Table 4: Default Dot1P Explicit Marking Actions
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
Table 2: Top Position QinQ and TopQ SAP Dot1P Evaluation (Continued)
Port / SAP Type Existing Packet Tags PBits Used for Match