Alcatel-Lucent 7750 SR - Table 10: Default Qinq and Topq SAP Dot1 P Evaluation

Virtual Leased Line Services
7750 SR OS Services Guide Page 373
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 is updated to include 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. Table 10 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)
Parameters top — The top parameter is mutually exclusive to the bottom parameter. When the top parameter is
specified, the top most PBits are used (if existing) to match any dot1p dot1p-value entries. The
folowing table defines the dot1p evaluation behavior when the top parameter is specified.
Table 10: 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
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