Apply Admission Control
The admission control mechanism for a rate policy determines what happens
when there isn't enough bandwidth to satisfy guaranteed rate requests.
Admission control lets you set a minimum level of service — and even
refuse connections — when congestion occurs or a persistent backlog
exists.
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Note: To perform this task from PolicyCenter, you must first select a unit or draft configuration in the Configurations window, then select the Class Tree tab from the right pane of this window.
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To apply an admission control to a rate policy:
1. Open the rate policy you want to modify. (See Modify
a Policy.)
2. Click admission control in the Policy
window. The Policy:Admission Control window opens.  show screen
3. Select the type of control appropriate for the
traffic class:
| Traffic Type |
Admission Control Options |
Description |
| TCP Non-Web |
refuse |
Refuse new connection requests until enough bandwidth
is available; connections are refused without user notification |
| squeeze |
Give new connections a minimal "trickle"
rate of less than 256 bps (1024 bps on PacketShaper 7500, 9500, and 10000 models) |
| TCP Web |
web-refuse |
Refuse new connection requests until enough bandwidth
is available; a refusal results in an HTTP error message |
| web-squeeze |
Give new connections a minimal "trickle"
rate of less than 256 bps (1024 bps on PacketShaper 7500, 9500, and 10000 models) |
| web-redirect |
Redirect HTTP traffic to a user-specified URL;
the redirect option is available only for HTTP classes on the response
side of the HTTP flow, not the request side |
| Non-TCP |
squeeze |
Give new connections a minimal "trickle"
rate of less than 256 bps (1024 bps on PacketShaper 7500, 9500, and 10000 models) |
4. If you selected web-redirect, specify the
URL in the Redirect-URL text box. Specify the full URL — for
example, http://www.mycompany.com/main.htm.
If you omit the "http:" tag, the string will be appended
to the end of the previously requested page, which is usually not the
behavior you want.
5. Click OK.
6. Click apply changes in the Policy
window.
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