System information

Troubleshooting IBM
Book Title
10-234
Link-layer problem (router is
primary)
Example:
The following example prevents phase shifting of the data with respect
to the clock:
interface serial 0
dce-terminal-timing enable
Step 5
Make sure that the device and the router are using the same signal
coding (NRZ
8
or NRZI
9
). NRZ is enabled by default on the router. To
enable NRZI encoding, use the nrzi-encoding interface configuration
command.
Example:
In the following example, serial interface 1 is configured for NRZI
encoding:
interface serial 1
nrzi-encoding
Step 6
Try reducing the line speed to 9600 bps using the clock rate interface
configuration command. Use the clock rate interface configuration
command to configure the clock rate for the hardware connections on
serial interfaces such as NIMs
10
and interface processors to an
acceptable bit rate.
Syntax:
The following is the syntax of the clock rate command:
clock rate bps
Syntax Description:
• bps—Desired clock rate in bits per second: 1200, 2400, 4800, 9600,
19200, 38400, 56000, 64000, 72000, 125000, 148000, 250000,
500000, 800000, 1000000, 1300000, 2000000, 4000000, or
8000000.
Example:
The following example sets the clock rate on the first serial interface to
64,000 bits per second:
interface serial 0
clock rate 64000
Step 7
Make sure that cabling is correct, securely attached, and undamaged.
Possible Problem Solution