Defining CoS Schedulers (J-Web Procedure)

Note:

This topic applies only to the J-Web Application package.

You can use the J-Web interface to define CoS schedulers on an EX Series switch. Using schedulers, you can assign attributes to queues and thereby provide congestion control for a particular class of traffic. These attributes include the amount of interface bandwidth, memory buffer size, transmit rate, and schedule priority.

To configure schedulers:

Select Configure > Class of Service > Schedulers.
Note:
After you make changes to the configuration on this page, you must commit the changes immediately for them to take effect. To commit all changes to the active configuration, select Commit Options > Commit. See Using the Commit Options to Commit Configuration Changes (J-Web Procedure) for details about all commit options.
Select one of the following options:
- Add—Adds a scheduler. Enter information into the Schedulers page as described in Table 1.
- Edit—Modifies an existing scheduler. Enter information into the Schedulers page as described in Table 1.
- Delete—Deletes an existing scheduler.

Table 1: Schedulers Configuration Page
Field	Function	Your Action
Scheduler name	Specifies the name for a scheduler.	To name a scheduler, type the name—for example, be-scheduler.
Scheduling priority	Sets the transmission priority of the scheduler, which determines the order in which an output interface transmits traffic from the queues. You can set the scheduling priority at different levels in the order of increasing priority from low to high. A high-priority queue with a high transmission rate might lock out lower-priority traffic.	To set a priority, select one: low—Packets in this queue are transmitted last. strict-high—Packets in this queue are transmitted first. To specify no scheduling priority, select the blank check box.
Buffer size	Defines the size of the delay buffer. By default, queues 0 through 11 are allotted the following percentages of the total available buffer space: Queue 0—75 percent Queue 1—0 percent Queue 2—0 percent Queue 3—5 percent Queue 4—0 percent Queue 5—0 percent Queue 6—0 percent Queue 7—0 percent Queue 8—15 percent Queue 9—0 percent Queue 10—0 percent Queue 11—5 percent Note: A large buffer size value correlates with a greater possibility of packet delays. Such a value might not be practical for sensitive traffic such as voice or video.	To define a delay buffer size for a scheduler, select the appropriate option: To specify no buffer size, select the blank check box. To specify buffer size as a percentage of the total buffer, select Percent and type an integer from 1 through 100. To specify buffer size as the remaining available buffer, select Remainder.
Shaping rate	Specifies the rate at which queues transmit packets.	To specify shaping rate as a percentage, select Percent and type an integer from 1 through 100. To specify shaping rate as a number, select Rate and enter a value. To specify no shaping rate, select the blank check box.
Transmit rate	Defines the transmission rate of a scheduler. The transmit rate determines the traffic bandwidth from each forwarding class you configure. By default, queues 0 through 11 are allotted the following percentages of the transmission capacity: Queue 0—75 percent Queue 1—0 percent Queue 2—0 percent Queue 3—5 percent Queue 4—0 percent Queue 5—0 percent Queue 6—0 percent Queue 7—0 percent Queue 8—15 percent Queue 9—0 percent Queue 10—0 percent Queue 11—5 percent	To define a transmit rate, select the appropriate option: To enforce the exact transmission rate, select Rate and enter a value. To specify the remaining transmission capacity, select Remainder Available. To specify a percentage of transmission capacity, select Percent and type an integer from 1 through 100. To specify no transmit rate, select the blank check box.

Defining CoS Schedulers (J-Web Procedure)

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