This wizard lets you assign priority levels to data applications based on their TCP or UDP ports. It provides a standard list of applications, and you select the ones you want to prioritize, the priority levels, and the interfaces where the prioritization occurs.
If you want to prioritize data applications that are not in the standard list, the wizard lets you add application names and port numbers to the list.
From the Available Devices list, select one or more devices on which data will be prioritized. Then click Add. The devices that you selected will move to the Selected Devices list.
Note: The Available Devices list shows only Catalyst 3550 switches and Catalyst 2950 switches that run the enhanced software image. Only these devices support data prioritization.
If you do not want to prioritize data on a device in the Selected Devices list, select it and click Remove.
From the Available Applications list, select one or more applications to prioritize. Then click Add. The applications that you selected will move to the Selected Applications list.
Note: The wizard lists common applications with their default port numbers. If your application is not listed or uses a port other than the default port, click Define New to specify an application, protocol, and port combination that you want.
If you do not want to prioritize an application in the Selected Applications list, select it and click Remove.
The cells in the Application column are applications that you selected. Assign a priority for each application by clicking in the appropriate cell in the Priority column and selecting Critical, High, or Medium from the drop-down list. Ordinary traffic is assigned low priority.
Note: The AF (assured forwarding) numbers show you the corresponding priority in the DiffServ system. Priorities higher than AF3 are reserved for voice and video traffic.
If you want even more control over data traffic, click Advanced Options.
This table adds additional columns to the table of applications and priorities in the previous step. You can edit the cells in the new columns. Specifically:
For standard applications, this table contains default maximum transmission rates and burst sizes. No defaults are provided for applications that you define.
At the top of this window is the name of a device that you selected for data prioritization. In this step, you select the device interfaces on which data will be prioritized.
From the Available Interfaces list, select one or more interfaces for this purpose. Then click Add. The interfaces that you selected will move to the Selected Interfaces list.
If you do not want to prioritize data on an interface in the Selected Interfaces list, select it and click Remove.
Note: On the Catalyst 2950 switches, Gigabit Ethernet interfaces only support maximum throughput rate values that are in multiples of 8000. If you include Gigabit Ethernet interfaces in your selection, you might get an error if you have modified the maximum rate in Advanced Options.