Configuring SLIP over a null modem cable

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To configure SLIP between two systems that are attached using a null modem cable, you can use this procedure, which alternates between the System Management Interface Tool (SMIT) interface and the command line to complete the configuration.

For clarity, these instructions use the names bronze and gold for the two hosts.

Physically connect bronze and gold by the null modem cable.
The following cables are required. (The cables are listed in the order they will be connected from bronze to gold.)
1. Cable B (part number 00G0943). Serial Port Jumper Cable; two are provided with each system, except models 220, 340, and 350 do not require them.
2. Cable D (part number 6323741, feature code 2936). Asynchronous Cable EIA-232/V.24.
3. Cable E (part number 59F2861, feature code 2937). Printer/Terminal Interposer EIA-232 (null modem cable).
4. Changer Adapter (both sides of the adapter are sockets).
Create a tty on bronze.
1. Type:
```
smit maktty
```
2. Select rs232 as the type of tty you wish to create.
3. Select an available serial port, for example sa0 (system serial port 1).
4. Select a port number for this tty from the list.
5. Set the BAUD rate to 19200. (Later, you will change this to 38400. But for now, use 19200.)
6. Set Enable LOGIN to disable, and then exit SMIT.
Create a tty on gold. Follow the same steps as you did for bronze (in step 2), except set Enable LOGIN to enable.
Note: The rest of these instructions assume that the tty number on both bronze and gold is tty1.
Test the physical connection with ATE.
1. On bronze, type:
```
ate
```
2. At the Unconnected Main Menu, select the Alter subcommand. Set the Rate to 19200, and the Device to tty1.
3. At the Unconnected Main Menu, select the Connect subcommand.
  When ATE prompts you for a phone number, press Enter. You should receive the message:
```
ate: 0828-010 The Connect command has made a connection through port tty1
```
4. Press Enter.
  You should receive a login prompt for gold. Log in to gold.
5. Finally, return to the connected screen, log out from gold, press Ctrl-v (to get to the ATE CONNECTED MAIN MENU), press the T key to terminate (end) the connection, and press the Q key to exit ATE.
  Note: If you do not receive a login prompt, return to step 1 and verify that your configuration is correct. Do not proceed until you can log in to gold.
Because the tty configuration for use with ATE is slightly different from the configuration for use with SLIP, you must make the following changes:
1. On bronze, type:
```
smit chgtty
```
2. Select tty1. Set the BAUD rate to 38400, and then exit SMIT.
3. On gold, type:
```
pdisable tty1
```
4. On gold, type:
```
smit chgtty
```
5. Select tty1. Set Enable LOGIN to disable, set the BAUD rate to 38400, and then exit SMIT.
Add the following line to the /usr/lib/uucp/Devices file on both bronze and gold:
```
Direct tty1 - 38400 direct
```
Create a SLIP network interface on bronze.
1. Type:
```
smit mkinet1sl
```
2. For TTY PORT for SLIP Network Interface, select tty1.
3. Specify an INTERNET ADDRESS, for example 130.130.130.1.
4. Specify the DESTINATION address (of gold), for example, 130.130.130.2, and then select OK or Enter.
Create a SLIP network interface on gold. Follow the same procedure as you did for bronze (in step 5), except exchange the INTERNET ADDRESS and the DESTINATION address.
Add the following two entries to the /etc/hosts file on both bronze and gold:
```
130.130.130.1   bronze
130.130.130.2   gold
```
The name you assign must be unique. In other words, if the Token-Ring interface on bronze is already assigned the name bronze, assign the SLIP interface a name such as bronze_slip.
Start SLIP on both bronze and gold. Type:
```
slattach tty1
```
Test the SLIP connection.
1. On bronze, type:
```
ping gold
```
2. On gold, type:
```
ping bronze
```

If both tests succeed, the SLIP connection is ready for use. If not, return to step 5 and verify that the configuration on both bronze and gold is correct.