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Priority and CoS-mapping Config
Tag-id/Cos-id: Indicates the precedence level de
fined by IEEE802.1P and the
CoS ID.
Queue TC-id:
Indicates the priority level of egress queue the packets with tag
and CoS-
id are mapped to. The priority levels of egress queue
are labeled as TC0, TC1, TC2 and TC3.
Configuration Procedure:
Step
Operation
Description
1
Configure the mapping
relation between the 802.1P
priority Tag/CoS and the TC
Required. On QoS→DiffServ→802.1P/CoS mapping
page, configure the mapping relation between the
802.1P priority Tag/CoS and the TC.
2 Select a schedule mode Required. On QoS→DiffServ→Schedule Mode page,,
select a schedule mode.
9.1.4 DSCP Priority
On this page you can configure DSCP priority. DSCP (DiffServ Code Point) is a new definition to
IP ToS field given by IEEE. This field is used to divide IP datagram into 64 priorities. When DSCP
Priority is enabled, IP datagram are mapped to different priority levels based on DSCP priority
mode; non-IP datagram with 802.1Q tag are mapped to different priority levels based on 802.1P
priority mode if 8021.1P Priority mode is enabled; the untagged non-IP datagram are mapped
based on port priority mode.
Choose the menu QoS→DiffServ→DSCP Priority to load the following page.
Figure 9-9 DSCP Priority
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