System information

Troubleshooting Dialin Connections 16-371
Dialin: Poor Performance
Table 16-15 outlines the problems that might cause this symptom and describes solutions to those
problems.
Table 16-15 Dialin: Poor Performance
Possible Causes Suggested Actions
Error correction is not configured on
the modem
Make certain the modem is configured for error correction.
For the exact syntax of the command, see your modem documentation.
Flow control is not enabled, is
enabled only on one device (either
DTE or DCE), or is misconfigured
Step 1 Use the show line aux-line-number exec command and look for the
following in the Capabilities field (see Figure 16-2):
Capabilities: Hardware Flowcontrol In, Hardware
Flowcontrol Out
If there is no mention of hardware flow control in this field, hardware
flow control is not enabled on the line. Hardware flow control for
access server-to-modem connections is recommended.
For an explanation of the output of the show line command, see the
“Using debug Commands” section earlier in this chapter.
Step 2 Configure hardware flow control on the line using the flowcontrol
hardware line configuration command.
To set the method of data flow control between the terminal or other
serial device and the router, use the flowcontrol line configuration
command. Use the no form of this command to disable flow control.
Syntax:
flowcontrol {none | software [lock][in | out]|hardware [in | out]}