AT-9000 Series Web Browser User Guide

AlliedWare Plus Version 2.1.2

Setting Port Parameters

 

This section describes how to display and modify the port settings such as back pressure and flow control. In addition, it provides procedures to display and modify storm control settings.

This section contains the following sections:

» Displaying the Port Parameters

» Changing the Port Settings

» Displaying the Storm Control Settings

» Modifying the Storm Control Settings

For additional information about the port parameters and the storm control feature, see the following chapters in the AlliedWare Plus Management Software Command Line Interface User’s Guide:

Port Parameters

Port Parameter Commands

Displaying the Port Parameters

The port numbering system in the AlliedWare Plus web browser interface is different from the port numbering system in the CLI. For an example of the port numbering equivalents for the first five ports, see Table 1.

Table 1. Port Numbering the Web versus the CLI

Web Port Numbering

CLI Port Numbering

port 1

port 1.0.1

port 2

port 1.0.2

port 3

port 1.0.3

port 4

port 1.0.4

port 5

port 1.0.5

port 5

port 1.0.6

port 7

port 1.0.7

port 8

port 1.0.8

Within the display, there is no differentiation between ports 25 through 28 and ports 25R through 28R. In the web interface, if you want to see if port 25 is connected versus port 25R, go to the home page and look at the illustration of the switch. For an example of the home page, see Figure 4.

To display the settings for all of the switch ports, do the following:

1. Select the Switching tab.

The Switching tab is displayed. See Figure 19.

 

Figure 19. Switching Tab with Port Tab

2. From the Switching tab, select Port.

The Port tab expands to the right.

3. From the Port tab, select Port Configuration.

The Port Configuration page is displayed. See Figure 20.

 

Figure 20. Port Configuration Page

4. The following fields are displayed:

Port— Indicates the port number.

Type— Specifies the if the port is fiber, indicated by 1000-FX, or copper, indicated by 100-FX.

Status— Indicates if the port is enabled or disabled. The default setting is “Enabled.” Disabling ports turns off their receivers and transmitters so that they cannot forward traffic.

Link— Indicates the port has successfully connected to a port on another switch or unit.

Negotiation— Indicates Autonegotiation. By default, Autonegotiation is enabled.

Speed— Specifies the speed of the port. The default setting is “1000-FX” for 1000Mbps. The other possible options are “10” for 10Mbps and “100” for 100Mbps.

Duplex— Indicates the duplex mode of the twisted pair ports or Auto Negotiation. The three settings are half, full, and Auto Negotiation.

Polarity— Indicates the port’s wiring configuration is MDI (medium dependent interface) or MDI-X (medium dependent interface crossover). This setting only applies to a twisted pair port that is operating at 10 or 100 Mbps.

You can enable or disable backpressure on ports where you disabled Auto-Negotiation and set the speeds and duplex modes manually to 10 or 100 Mbps in half-duplex mode.

Back Pressure— Indicates if back pressure is enabled or disabled on a port. Backpressure is used by ports during periods of packet congestion to temporarily stop their network counterparts from transmitting more packets. This prevents a buffer overrun and the subsequent loss and retransmission of network packets. A port initiates backpressure by transmitting on the shared link to cause a data collision, which causes its link partner to cease transmission. The default setting is “Disabled.”

Back Pressure Limit— Indicates the threshold level for back pressure on a port. Specifies the number of cells for back pressure. The default value is 7935 cells.

Flow Control— Indicates if flow control (send and receive) is enabled or disabled on a port. When flow control is enabled, a port sends pause packets when it reaches the point of packet congestion. Also, the port stops transmitting packets when it receives pause packets from its local or remote counterpart. When flow control is disabled, the port sends pause packet regardless of packet congestion. In addition the port continues transmitting packets when it receives pause packets from its local or remote counterpart. The default is “Disabled.”

Flow Control Limit— Indicates the threshold level for flow control on a port. The default value is 7935.

Changing the Port Settings

You can change the settings of one port at a time. Use the following procedure to change the port settings or reset a port to its default value,

To change the port settings, do the following:

1. Select the Switching tab.

The Switching tab is displayed. See Figure 19.

2. From the Switching tab, select Port.

The Port tab expands to the right.

3. From the Port tab, select Port Configuration.

The Port Configuration page is displayed. See Figure 20.

4. Click Edit next to the port that you want to modify.

The Port Configuration Modify page is displayed. See Figure 21.

 

Figure 21. Port Configuration Modify Page

5. Configure the following parameters as needed:

Port— Indicates the port number.

Port Type— Indicates the type of port, fiber or copper. You cannot modify this field.

Status— Indicates if the port is enabled or disabled. Choose between “Enabled” or “Disabled.” The default setting is “Enabled.” Disabling ports turns off their receivers and transmitters so that they cannot forward traffic. You may want to disable a port if there is a problem with a cable or network device.

Negotiation— Indicates the state of Auto Negotiation on a port. Select “Auto” to enable Auto Negotiation on a port or “Manual” to disable Auto Negotiation. The default setting is Auto. When the setting for this field is “Auto,” the Speed and Duplex fields change from white to brown and you cannot select them. To change the Speed and Duplex Mode fields, change the Negotiation setting to “Manual.”

Speed— Indicates the port speed. Select 10mb, 100mb, or 1000mb.

Duplex Mode— Sets the set the duplex modes of the twisted pair ports or activates Auto-Negotiation manually. The settings are half, full, or Auto Negotiation. Ports operating in half-duplex mode can either receive or transmit packets, but not both at the same time. Ports operating in full-duplex can both send and receive packets, simultaneously.

Polarity— Sets the wiring configuration of the twisted pair ports when they are operating at 10 or 100 Mbps, in either half- or full-duplex mode.

A twisted pair port that is operating at 10 or 100 Mbps can have one of two wiring configurations. The configurations are known as MDI and MDI-X. To forward traffic, a port on the switch and a port on a network device must have different settings. For instance, the wiring configuration of a switch port has to be MDI if the wiring configuration on a port on a network device is MDIX.

To set this parameter on a port, you must set the speed and duplex mode manually. A port that is using Auto-Negotiation sets its wiring configuration automatically using auto-MDI/MDIX.

Back Pressure Status— Activates or deactivates back pressure on the ports. Use this field to enable or disable back pressure on ports that are operating at 10 or 100 Mbps in half-duplex mode. Back pressure is used by ports during periods of packet congestion to temporarily stop their network counterparts from transmitting more packets. This prevents a buffer overrun and the subsequent loss and retransmission of network packets. A port initiates back pressure by transmitting on the shared link to cause a data collision, which causes its link partner to cease transmission.

To set back pressure on a port, you must configure the speed and duplex mode manually. You cannot set back pressure on a port that is using Auto-Negotiation.

Back Pressure Limit (1 - 7935)— Indicates a threshold level for back pressure on a port. Specifies the number of cells for back pressure. A cell represents 128 bytes. The range is 1 to 7935 cells. The default value is 7935 cells.

Flow Control Status— Enables or disables the flow control feature. By default, flow control is disabled on a port.

Flow Control Limit (1 - 7935)— Indicates the threshold levels for flow control on the ports. Specifies the number of cells for flow control. A cell represents 128 bytes. The range is 1 to 7935 cells. The default value is 7935 cells.

6. To set the port to the default port value, click Default. Otherwise skip this step.

7. Click Apply.

8. Click SAVE.

Displaying the Storm Control Settings

To display the storm control settings, do the following:

1. Select the Switching tab.

The Switching tab is displayed. See Figure 19.

2. From the Switching tab, select Port.

The Port tab expands to the right.

3. From the Port tab, select Storm Control.

The Storm Control List page is displayed. See Figure 22.

 

Figure 22. Storm Control List Page

The following fields are displayed:

Port Id— Indicates the port number.

Broadcast— Indicates Broadcast packets are received, indicated by “ON,” or not received, indicated by “OFF,” by the port. By default, Broadcast packets are not received by a port.

Broadcast Level— Specifies the maximum number of ingress packets per second of broadcast packets the port will forward. The range is 0 to 33,554,431 packets. The default is 33,554,431 packets.

Multicast— Indicates Multicast packets are “ON” or “OFF” on the port. By default, Multicast packets are not received by a port.

Multicast Level— Specifies the maximum number of ingress packets per second of multicast packets the port will forward. The range is 0 to 33,554,431 packets. The default is 33,554,431 packets.

Dlf— Indicates unknown unicast packets are “ON” or “OFF” on the port. By default, the setting is “ON” indicating that unknown unicast packets are received by a port.

Dlf Level— Specifies the maximum number of ingress packets per second of unknown unicast packets the port forwards. The range is 0 to 33,554,431 packets. The default is 33,554,431 packets.

Modifying the Storm Control Settings

To modify the storm control settings, do the following:

1. Select the Switching tab.

The Switching tab is displayed. See Figure 19.

2. From the Switching tab, select Port.

The Port tab expands to the right.

3. From the Port tab, select Storm Control.

The Storm Control List page is displayed. See Figure 20.

Click Edit on the port that you want to modify.

The Storm Control Settings page is displayed. See Figure 23.

 

Figure 23. Storm Control Settings Page

4. Change the following fields as needed:

Port Number— Indicates the port number.

Broadcast— Indicates Broadcast packets are received, indicated by “ON,” or not received, indicated by “OFF,” by the port. By default, Broadcast packets are not received by a port.

Broadcast Level— Specifies the maximum number of ingress packets per second of broadcast packets the port will forward. The range is 0 to 33,554,431 packets. The default is 33,554,431 packets.

Multicast— Indicates Multicast packets are “ON” or “OFF” on the port. By default, this field is set to “OFF” which indicates Multicast packets are not received by a port.

Multicast Level— Specifies the maximum number of ingress packets per second of multicast packets the port forwards. The range is 0 to 33,554,431 packets. The default is 33,554,431 packets.

DLF— Indicates unknown unicast packets are “ON” or “OFF” on the port. By default, the setting is “ON” indicating that unknown unicast packets are received by a port.

DLF Level— Specifies the maximum number of ingress packets per second of unknown unicast packets the port forwards. The range is 0 to 33,554,431 packets. The default is 33,554,431 packets.

5. Click Apply.

6. Click SAVE.