3.8 Advanced Port Configuration
The Advanced Port Configuration Menu allows you to control the port broadcast and multicast rate, to enable or disable 802.3x flow control, and to set the default priority of the port.
To access the Advanced Port Configuration Menu, type v in the Port Configuration Menu. The Advanced Port Configuration Menu appears, as shown below.
IntraCore | 3524 Advanced Port | Configuration Menu | Unit Type: [IntraCore 3524 Unit] | |||
Unit: [1] |
|
| Port: | [01] |
|
|
Operating | Status: | |||||
Flow Ctrl: |
| |||||
Class Of Service: | ******** | ******** | ******** | ** | ||
Priority: |
| 00000000 | 00000000 | 00000000 | 00 | |
Flow Control: Disabled |
|
|
|
| ||
IEEE 802.1p Traffic Class Of Service: Enabled |
| |||||
Port Default Priority: | 0 |
|
|
| ||
<Cmd> | <Description> |
|
|
|
| |
h | Help for Legends |
|
|
| ||
f | Toggle Flow Control Enable/Disable |
| ||||
c | Toggle Traffic Class Of Service (COS) Enable/Disable | |||||
i | Set Port Default Priority |
|
| |||
q | Return to previous menu |
|
| |||
Command> |
|
|
|
|
|
|
Select U)nit Nex)t unit | Prev) unit | S)elect port N)ext port P)rev port | ||||
The following subsections explain the configuration options in the Advanced Port Configuration Menu.
3.8.1 Enabling or Disabling 802.3x Flow Control
Use the following procedure to control traffic and avoid congestion, such as when there is a shortage of buffer resources for the port. Flow control is accomplished by means of standard PAUSE control frames for each port, independent of all others. Before you can enable flow control for a port, that port must be configured to operate in Full Duplex mode.
If you enable flow control on a port, and that port runs short of buffer resources, the port will transmit PAUSE frames. When it receives them, the link partner obeys these PAUSE frames. When the
To enable flow control, take the following steps.
1.Access the Port Configuration Menu by typing p in the Configuration Menu.
2.If necessary, select which unit to be configured on the System Unit Map and press Enter.
3.Type v in the Basic Port Configuration Menu to open the Advanced Port Configuration Menu.
4.To select the port for which you want to enable or disable flow control, type s, n or p.
5.To toggle flow control for the selected port, type f.
6.To configure flow control on another unit in the stack, type u to select the unit.
In the Advanced Port Configuration Menu, the Flow Control symbol for the selected port reflects its change in state, as does the 802.3x Flow Control setting.
Important! When using this method of flow control, the link partner must be configured to recognize PAUSE frames.
3.8.2 Setting Port Class of Service
To set a port’s class of service, take the following steps.
1.Access the Port Configuration Menu by typing p in the Configuration Menu.
2.If necessary, select which unit to be configured on the System Unit Map and press Enter.
31
