Edge-Core ECS4110-28T, Management Manual, Page: 283 / 1514

C
HAPTER
10
| Class of Service
Layer 3/4 Priority Settings
– 283 –
Figure 134: Showing DSCP to DSCP Internal Mapping
M
APPING
C
O
S
P
RIORITIES TO
I
NTERNAL
DSCP
V
ALUES
Use the Traffic > Priority > CoS to DSCP page to maps CoS/CFI values in
incoming packets to per-hop behavior and drop precedence values for
priority processing.
CLI R
EFERENCES
◆
"qos map cos-dscp" on page 1200
C
OMMAND
U
SAGE
◆
The default mapping of CoS to PHB values is shown in Table 18 on
page 284 .
◆
Enter up to eight CoS/CFI paired values, per-hop behavior and drop
precedence.
◆
If a packet arrives with a 802.1Q header but it is not an IP packet, then
the CoS/CFI-to-PHB/Drop Precedence mapping table is used to
generate priority and drop precedence values for internal processing.
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)