Internet Enhanced Services
7750 SR OS Services Guide Page 777
match-qinq-dot1p
Syntax match-qinq-dot1p {top | bottom}
no match-qinq-dot1p
Context config>service>ies>if>sap>ingress
config>service>ies>sub-if>grp-if>sap>ingress
Description This command specifies which Dot1Q tag position Dot1P bits in a QinQ encapsulated packet should
be used to evaluate Dot1P QoS classification.
The match-qinq-dot1p command allows the top or bottom PBits to be used when evaluating the
applied sap-ingress QoS policy’s Dot1P entries. The top and bottom keywords specify which
position should be evaluated for QinQ encapsulated packets.
The no form of the command restores the default dot1p evaluation behavior for the SAP.
By default, the bottom most service delineating Dot1Q tags Dot1P bits are used. Table 24 defines the
default behavior for Dot1P evaluation when the match-qinq-dot1p command is not executed.
Default no match-qinq-dot1p — No filtering based on p-bits.
top or bottom must be specified to override the default QinQ dot1p behavior.
Table 1: Default 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 TopQ 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 TopQ PBits
QinQ / QinQ TopQ BottomQ BottomQ PBits
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