11.8. Command Descriptions

This command creates a text description stored in the configuration file for a configuration context.

The description command associates a text string with a configuration context to help identify the context in the configuration file.

The no form of this command removes any description string from the context.

This command copies existing QoS policy entries for a QoS policy-id to another QoS policy-id. It also allows bulk modifications to an existing policy with the use of the overwrite keyword.

This command enables the context to configure a QoS slope policy.

This command enables the context to configure the high-priority, low-priority, and non-tcp slope parameters per queue.

This command enables the context to define the high priority RED slope graph. Each buffer pool supports a high priority RED slope for managing access to the shared portion of the buffer pool for high priority or in-profile packets.

The high-slope parameters can be changed at any time and the affected buffer pool high priority RED slopes will be adjusted appropriately.

Note: See Table 46 for information about the mapping of traffic types to use high-slope parameters on 7210 SAS-D. See Table 47 for information about the mapping of traffic types to use high-slope parameters on 7210 SAS-Dxp.

The no form of this command reverts the high slope configuration commands to the default values. If the commands within high-slope are set to the default parameters, the high-slope node will not appear in save config and show config output unless the detail parameter is present.

This command enables the context to define the low priority RED slope graph. Each buffer pool supports a low priority RED slope for managing access to the shared portion of the buffer pool for low priority or out-of-profile packets.

The low-slope parameters can be changed at any time and the affected buffer pool low priority RED slopes must be adjusted appropriately.

Note: See Table 46 for information about the mapping of traffic types to use low-slope parameters on 7210 SAS-D. See Table 47 for information about the mapping of traffic types to use low-slope parameters on 7210 SAS-Dxp.

The no form of this command reverts the low slope configuration commands to the default values. If the leaf commands within low-slope are set to the default parameters, the low-slope node will not appear in save config and show config output unless the detail parameter is present.

This command configures non-tcp profile RED slope parameters.

Note: See Table 46 for information about the mapping of traffic types to use non-TCP-slope parameters on 7210 SAS-D.

The no form of this command reverts to the default.

This command configures a weighting factor to calculate the new shared buffer average utilization after assigning buffers for a packet entering a queue. To derive the new shared buffer average utilization, the buffer pool takes a portion of the previous shared buffer average and adds it to the inverse portion of the instantaneous shared buffer utilization. The time-average-factor command sets the weighting factor between the old shared buffer average utilization and the current shared buffer instantaneous utilization when calculating the new shared buffer average utilization.

The TAF value applies to all high priority, low priority and non-tcp packets WRED slopes for egress access and network buffer pools controlled by the slope policy.

The no form of this command reverts the default setting.

This command configures the low priority or high priority or non-tcp Weighted Random Early Detection (WRED) slope position for the reserved and shared buffer average utilization value where the packet discard probability rises directly to one. The percent parameter is expressed as a percentage of the shared buffer size.

The no form of this command reverts the value to the default.

This command sets the low priority or high priority RED slope position for the maximum non-one packet discard probability value before the packet discard probability rises directly to one. The percent parameter is expressed as a percentage of packet discard probability where always discard is a probability of 1. A max-prob value of 75 represents 75% of 1, or a packet discard probability of 0.75.

The no form of this command reverts the value to the default setting.

This command enables or disables the administrative status of the RED slope.

By default, all slopes are shutdown and have to be explicitly enabled (no shutdown).

The no form of this command administratively enables the RED slope.

This command sets the low priority or high priority RED slope position for the shared buffer average utilization value where the packet discard probability starts to increase above zero. The percent parameter is expressed as a percentage of the shared buffer size.

The no form of this command reverts the value to the default.

This command provides the user with the option to use 2 WRED slopes per queue or use 3 WRED slopes per queue. It is a global option which affects all the queues in the system. In other words, user can choose to use either 2 WRED slopes for all queues in the system or 3 WRED slopes for all queues in the system.

Using 3 WRED slopes per queue allows differentiating tcp in-profile traffic, tcp out-of-profile traffic, and non-tcp traffic. For non-tcp traffic both in and out profile use the same slope.

Using 2 WRED slopes per queue allows differentiating in-profile and out-of-profile traffic, without further differentiation of tcp and non-tcp traffic. All traffic, irrespective of tcp or non-tcp traffic, uses either in-profile slope or out-of-profile slope, depending on the profile assigned to the traffic by the ingress meters.

Note: See Table 46 for information about the mapping of traffic types to use high-slope, low-slope, and non-TCP-slope parameters on 7210 SAS-D.

The no form of this command enables the use of 3 WRED slopes per queue.

This command displays slope policy information.