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ISCOM2600G-HI (A) Series Configuration Guide
7.2 Configuring priority
7.2.1 Preparing for configurations
Scenario
You can choose to trust the priority carried by packets from an upstream device, or process
packets with untrusted priority through the traffic class and traffic policy. After being
configured to priority trust mode, the ISCOM2600G-HI series switch processes packets
according to their priorities and provides services accordingly.
To specify local priority for packets is the prerequisite for queue scheduling. For packets from
the upstream device, you can not only map the external priority carried by packets to different
local priorities, but also configure local priority for packets based on interface. Then the
ISCOM2600G-HI series switch will conduct queue scheduling according to local priority of
packets. Generally, IP packets need to be configured with mapping from IP precedence/DSCP
to local priority; while VLAN packets need to be configured with mapping from CoS to local
priority.
Prerequisite
N/A
7.2.2 Default configurations of basic QoS
Default configurations of basic QoS are as below.
Global QoS status
Interface trust priority type
Mapping from CoS to local priority
Mapping from DSCP to local priority
Mapping from ToS to local priority and color
Interface priority
Table 7-3 Default mapping from CoS to local priority
priority
Function
CoS
0
1
Local
0
1
(green)
(green)
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2
3
4
2
3
4
(green)
(green)
(green)
Default value
Enable
Trust CoS
See Table 7-3.
See Table 7-4.
See Table 7-5.
0
5
6
5
6
(green)
(green)
7 QoS
7
7
(green)
295
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