C
HAPTER
10
| Class of Service
Layer 3/4 Priority Settings
– 279 –
PARAMETERS
These parameters are displayed:
â—† Trust Mode
â–
CoS – Maps layer 3/4 priorities using Class of Service values.
(This is the default setting.)
â–
DSCP – Maps layer 3/4 priorities using Differentiated Services Code
Point values.
WEB INTERFACE
To configure the trust mode:
1. Click Traffic, Priority, Trust Mode.
2. Set the trust mode.
3. Click Apply.
Figure 135: Setting the Trust Mode
MAPPING INGRESS
DSCP VALUES TO
INTERNAL DSCP
V
ALUES
Use the Traffic > Priority > DSCP to DSCP page to map DSCP values in
incoming packets to per-hop behavior and drop precedence values for
internal priority processing.
The DSCP is six bits wide, allowing coding for up to 64 different forwarding
behaviors. The DSCP replaces the ToS bits, but it retains backward
compatibility with the three precedence bits so that non-DSCP compliant,
ToS-enabled devices, will not conflict with the DSCP mapping. Based on
network policies, different kinds of traffic can be marked for different kinds
of forwarding.
CLI REFERENCES
â—† "qos map dscp-mutation" on page 1176
COMMAND USAGE
â—† Enter per-hop behavior and drop precedence for any of the DSCP
values 0 - 63.
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