Configuring Interface Physical Options

You can also configure the following low-level serial interface parameters:

• Send Queue Limit ---The maximum number of outbound data frames that can be queued to the interface for transmission. When the queue limit is exceeded, frames are returned to the Network layer.

  The Send Queue Limit functionality provides transmit time limiting with a random drop mechanism, as well as an item count limit with a random drop.

• Data Encoding ---The serial data encoding technique, specified as Non-Return to Zero (NRZ) or Non-Return to Zero Inverted (NRZI). Data encoding is meaningful only when the interface framing type is synchronous.
• Idle Line State ---The serial line interframe idle line transmission state, specified as either Flags (repeated transmission of the High-level Data-Link Control [HDLC] 7E synchronous pattern) or Marks (holding the data line in the marking state).
• Simulate DSR ON: , Simulate DCD ON: , Simulate CTS On: ---These three options should be used only when the attached modem or communication device does not provide the signal or an equivalent.

How to Configure Interface Physical Options

To configure authentication and call management parameters, complete the following steps:

1. Load NIASCFG, then select the following parameter path:

   Select Configure NIAS > Protocols and Routing > Network Interfaces

2. Scroll to a configured PPP interface, then select it.

   The PPP Network Interface Configuration menu is displayed.

3. Select Physical Options .

   The PPP Physical Configuration Options menu is displayed.

4. Do one or more of the following:

   To configure the send queue limit, select Send Queue Limit, then enter a value.

   Set the limit to zero for unlimited queueing, but keep in mind that this can result in NetWare system buffer depletion.

   To configure data encoding, select Data Encoding, press Enter, then select one of the displayed options.

   Use NRZ encoding unless the remote PPP node supports only NRZI. Make sure that data encoding types are configured to be the same at both ends of the link.

   To configure the serial line interframe idle line transmission state, select Idle Line State, then select one of the displayed options.

   Select Flags for repeated transmission of the HDLC 7E synchronous pattern. Select Marks to make the transmitter hold the data line in the marking state.

   NOTE:  The idle line state must be the same at both ends of the link. Not all drivers support both Flags and Marks . If the selected driver does not support both options, only the supported option is offered. Make sure you select the idle line state that you know the remote PPP node supports.

   To configure the WAN driver to assume the interface signal is on, do one or more of the following:

   NOTE:  Use these options only when the attached modem or communication device does not provide the signal or an equivalent.

   • Select Simulate DSR On: , then select Yes .
   • Select Simulate DCD On: , then select Yes .
   • Select Simulate CTS On: , then select Yes .

5. Press Esc to return to the Internetworking Configuration menu; save your changes when prompted.

6. If you want these changes to take effect immediately, select Reinitialize System .

   If you want to configure other parameters, do so now, then reinitialize the system when you are finished.