Specifications

272

Priority and CoS-mapping Config
Tag-id/CoS-id:
Indicates the precedence level defined by IEEE 802.1P 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 eg
ress queue are
labeled as TC0, TC1, TC2 to TC7.
Note:
To complete QoS function configuration, you have to go to the Schedule Mode page to select a
schedule mode after the configuration is finished on this page.
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 Priority 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.
12.1.4 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.