Supermicro SSE-G2252, User Manual

Page: 231 / 1401

Chapter 10: Class of Service
Layer 3/4 Priority Settings
– 236 –
Note that priority tags in the original packet are not modified by this
command.
•
The internal DSCP consists of three bits for per-hop behavior (PHB)
which determines the queue to which a packet is sent; and two bits for
drop precedence (namely color) which is used by Random Early
Detection (RED) to control traffic congestion.
P
ARAMETERS
These parameters are displayed:
•
CoS – CoS value in ingress packets. (Range: 0-7)
•
CFI – Canonical Format Indicator. Set to this parameter to “0” to
indicate that the MAC address information carried in the frame is in
canonical format. (Range: 0-1)
•
PHB – Per-hop behavior, or the priority used for this router hop.
(Range: 0-7)
•
Drop Precedence – Drop precedence used for Random Early Detection
in controlling traffic congestion. (Range: 0 - Green, 3 - Yellow, 1 - Red)
W
EB
I
NTERFACE
To map CoS/CFI values to internal PHB/drop precedence:
1.
Click Traffic, Priority, CoS to DSCP.
2.
Select Configure from the Action list.
3.
Set the PHB and drop precedence for any of the CoS/CFI combinations.
4.
Click Apply.
Table 10-7: Default Mapping of CoS/CFI to Internal PHB/Drop Precedence
CFI
CoS
0 1
0 (0,0) (0,0)
1 (1,0) (1,0)
2 (2,0) (2,0)
3 (3,0) (3,0)
4 (4,0) (4,0)
5 (5,0) (5,0)
6 (6,0) (6,0)
7 (7,0) (7,0)