QoS

Scenarios

You can enable or disable QoS as required. You can configure or cancel bandwidth limits for each EIP using a shared bandwidth.

Notes and Constraints

• QoS can only be enabled when the shared bandwidth is at least equal to 50 Mbit/s.
• The maximum guaranteed bandwidth can be 2000 Mbit/s.
• The sum of guaranteed bandwidths that you configured for the EIPs in a shared bandwidth cannot exceed the shared bandwidth.
• If the size of a shared bandwidth is decreased (such as its bandwidth add-on package expires), the guaranteed bandwidth and the maximum bandwidth of the EIPs that use the shared bandwidth may be adversely affected.
• The bandwidth limit will be disabled when the bandwidth add-on package used by the shared bandwidth expires.

Enabling QoS

• Assign a shared bandwidth by referring to Assigning a Shared Bandwidth and select the QoS option.
  Figure 1 Selecting the QoS option
  
• In the shared bandwidth list, locate the row that contains the shared bandwidth, click More in the Operation column, and click Enable QoS.

Disabling QoS

In the shared bandwidth list, locate the target shared bandwidth, click More in the Operation column, and click Disable QoS.

Configuring or Canceling Bandwidth Limits

1. Go to the shared bandwidth list page.

2. In the shared bandwidth list, click the name of the target shared bandwidth.
3. On the EIPs or IPv6 Addresses tab page, configure or cancel bandwidth limits as required.
   • Configuring bandwidth limit
     1. Locate the target EIP or IPv6 address and click Configure Bandwidth Limit in the Operation column.
     2. Set Guaranteed Bandwidth and Maximum Bandwidth.
     3. Click OK.
   • Canceling bandwidth limit
     1. Locate the target EIP or IPv6 address and click Cancel Bandwidth Limit in the Operation column.
     2. Click OK.