3Com Switch 7700 Configuration Manual page 254

246 C 7: Q S/ O
HAPTER O PERATION
Configuring the Priority for Queue Scheduling
You can use the following command to configure which priority is used for queue
scheduling.
Perform the following configuration in system view.
Table 15 Configuring the Priority for Queue Scheduling
Operation
Configure the priority for queue scheduling
By default, the switch chooses the local preference as the basic priority.
Entering QoS View
You should run most QoS configurations in QoS view.
Perform the following configuration in Ethernet interface view.
Entering QoS View
Table 16
Operation
Enter QoS view
Different I/O modules may support different QoS functions and you can view the
QoS configuration items available for the current interface unit by keying in "?" in
QoS view.
Only the 20-Port 10/100/1000BASE-T and 20-Port 1000BASE-X-SFP I/O modules
support setting of line rate and packet redirection.
Configuring the Traffic Limit
Traffic limiting establishes actions to deal with the traffic flow that exceeds the
threshold. These actions can include discarding packets or lowering priority.
You must define the corresponding ACL before performing this configuration task.
Perform the following configuration in QoS view.
Table 17 Configuring the Traffic Limit
Operation
Configure the flow-based rate limit
Cancel the configuration of the flow-based
rate limit
For details about the command, see the Switch 7700 Command Reference Guide.
Command
priority-trust { dscp | ip-precedence | cos |
local-precedence }
Command
qos
Command
traffic-limit { inbound | outbound } {
ip-group { acl-number | acl-name } [ rule rule
] | link-group { acl-number | acl-name } [ rule
rule ] } target-rate [ exceed action ]
undo traffic-limit { inbound | outbound } {
ip-group { acl-number | acl-name } [ rule rule
] | link-group { acl-number | acl-name } [ rule
rule ] }