Alcatel-Lucent 7750 SR - Page 707

Virtual Private LAN Services
7750 SR OS Services Guide Page 707
match-qinq-dot1p
Syntax match-qinq-dot1p {top | bottom}
no match-qinq-dot1p de
Context config>service>vpls>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 mandatory de keyword is added to the above command line to specify on a per SAP basis the
source for the DE bit. The de keyword is effective if there is an explicit command in the sap ingress
policy that specifies the use of DE bit for QoS Classification – for example, de-1-out-profile.
Otherwise the rules for the matching of dot1p bits will apply the same way for the DE bit whenever
the usage is activated explicitly. The text will be updated to include also the DE bit in the header of
the tables next to the dot1p bits.
The no form of this command reverts the dot1p and de bits matching to the default tag
By default, the bottom most service delineating Dot1Q tags Dot1P bits are used. The following
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
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 / TopQ
TopQ BottomQ BottomQ PBits