3Com Switch 7700 Configuration Manual page 256

248 C 7: Q S/ O
HAPTER O PERATION
Only the 20-Port 10/100/1000BASE-T and 20-Port 1000BASE-X-SFP I/O modules
support this configuration.
Relabeling the Priority Level
Relabeling the priority level creates a policy to tag the priority of the packets so
they match the ACL. The new priority can be filled in the priority field of the
packet header.
Perform the following configuration in QoS view.
Table 21 Relabeling the Priority Level
Operation
Relabel traffic priority
Cancel the traffic priority marking
The Switch 7700 tags the packets with IP precedence (specified by ip-precedence
in the traffic-priority command), or DSCP (specified by dscp in the
traffic-priority command). You can tag the packets with different priorities as
required on QoS policy.
For details about the command, see the Switch 7700 Command Reference Guide.
Configuring the RED Operation
The RED operation monitors and processes, packet forwarding to prevent network
congestion.
The 20-Port 10/100/1000BASE-T and 20-Port 1000BASE-X-SFP I/O modules do not
support this configuration.
Perform the following configuration in QoS view.
Table 22 Configure RED Operation
Operation
Configure RED Operation
Cancel the configuration of RED Operation
For details about the command, see the Switch 7700 Command Reference Guide.
Command
traffic-priority { inbound | outbound } {
ip-group { acl-number | acl-name } [ rule rule
] | link-group { acl-number | acl-name } [ rule
rule ] } { { dscp dscp-value | ip-precedence
pre-value ] [ local-precedence pre-value }* }
undo traffic-priority { inbound | outbound
} { ip-group { acl-number | acl-name } [ rule
rule ] | link-group { acl-number | acl-name } [
rule rule ] }
Command
traffic-red outbound { ip-group {
acl-number | acl-name } [ rule rule ] |
link-group { acl-number | acl-name } [ rule
rule ] } qstart qstop probability
undo traffic-red outbound { ip-group {
acl-number | acl-name } [ rule rule ] |
link-group { acl-number | acl-name } [ rule
rule ] }