To configure a newly-created serial interface, or to configure a previously-created serial interface:
1. Click on the home page.
2. Click the Interfaces link.
3. Click the physical interface link in the Interface column (for example, ser-s2p1c0) on the Interface Configuration page.
This takes you to the Interface page, where you set parameters for the selected interface.
4. Enter the IP address for the local end of the point-to-point link in the New IP Address text box.
5. Enter the subnet mask for the local end of the link in the New Subnet Mask text box.
6. Enter the IP address for the other end of the point-to-point link in the Remote Address text box.
A remote address must be specified for a serial interface.
7. Select the encapsulation type in the Encaps type field.
Changes to this field take effect the next time the interface is brought up. If the interface is already up and operational, you can force the change to take effect by resetting the interface:
When you select Cisco HDLC as the encapsulation type, the system automatically sends keep-alive packets every 10 seconds. The remote end of the link must also be configured to send keep-alive packets every 10 seconds, or the link state will fluctuate.
8. If this is an X.21 interface, select the On button in the X.21 Interface field; otherwise, select the Off button.
When configuring an X.21 interface this field must be set to On. Otherwise, it must be set to Off.
Changes to this field take effect the next time the interface is brought up. If the interface is already up and operational, you can force the change to take effect by resetting the interface:
9. If you want internal clocking to be used, select On for the Internal Clock field.
Internal clocking is used when connecting point-to-point to another machine using a mechanism that does not provide an external clock source, such as when using a null modem cable.
Changes to this field take effect the next time the interface is brought up. If the interface is already up and operational, you can force the change to take effect by resetting the interface:
If internal clocking is set to Off, baud rate is not used; skip to step 11.
10. If you selected On for the Internal Clock field, enter the baud rate in the Baud Rate (bps) text box; otherwise, leave this field blank.
If both ends of the point-to-point link have to provide clocking, they should be set to the same baud rate.
Changes to this field take effect the next time the interface is brought up. If the interface is already up and operational, you can force the change to take effect by resetting the interface:
The driver selects the standard baud rate closest to the number you specify in this field. The following table shows the user's desired baud rate mapped to the actual bit rate generator (BRG) clock rate. Because of the algorithm used, in certain circumstances only approximate values can be generated. Each entry consists of three elements: baud rate (bps), TMC, and BR.
Baud Rate = FCLK/TMC/2^BR
Baud Table for Crystal Frequency of 16.000 Mhz
Desired BPS |
TMC |
BR |
Actual BPS |
Deviation |
---|---|---|---|---|
300 |
104 |
9 |
300 |
0.0% |
600 |
52 |
9 |
600 |
0.0% |
1200 |
26 |
9 |
1201 |
0.1% |
2400 |
13 |
9 |
2403 |
0.1% |
4800 |
13 |
8 |
4807 |
0.1% |
9600 |
13 |
7 |
9615 |
0.2% |
19200 |
13 |
6 |
19230 |
0.2% |
38400 |
13 |
5 |
38461 |
0.2% |
56000 |
143 |
1 |
55944 |
-0.1% |
64000 |
125 |
1 |
64000 |
0.0% |
128000 |
125 |
0 |
128000 |
0.0% |
256000 |
63 |
0 |
253968 |
-0.8% |
512000 |
31 |
0 |
516129 |
0.8% |
1024000 |
16 |
0 |
1000000 |
-2.3% |
1544000 |
11 |
0 |
1454545 |
-5.3% |
2048000 |
8 |
0 |
2000000 |
-2.3% |
4096000 |
4 |
0 |
4000000 |
-2.3% |
8192000 |
2 |
0 |
8000000 |
-2.3% |
11. (Optional) Enter an alias name in the Logical Name edit box.
12. Click .
13. Click .
If you want to make the changes permanent, click on the configuration
page.
Secondary IP addresses are not supported on serial interfaces.