WAN Subsystem Configuration and Management Manual

Changing the Initial WAN Subsystem Configuration

WAN Subsystem Configuration and Management Manual—522463-011

3-13

Configuration Guidelines

•

The preferred and alternate TCP/IP processes that one SWAN concentrator is

configured to use must be configured with separate SUBNETS.

•

If the SWAN concentrator is on the same network as the host and you are not

using any routers, the IP addresses associated with Ethernet path A must be on

the same subnet as the preferred TCP/IP process. If the SWAN concentrator is

connected using routers then the IP address associated with Ethernet path A must

be on a different subnet as the preferred TCP/IP process. The guideline also

applies to Ethernet path B.

•

The IP addresses associated with Ethernet path A must be on the same subnet as

the preferred TCP/IP process. The IP addresses associated with Ethernet path B

must be on the same subnet as the alternate TCP/IP process.

Reconfiguring TCP/IP Processes Example

1. If there are WAN lines started on the SWAN concentrator, shut them down by using

the appropriate data communications subsystem SCF STOP LINE or ABORT LINE

command.

2. Use the SCF INFO PROCESS command to display a list of the names of the

WANBoot and TFTP server processes. Use the SCF STATUS PROCESS

command to determine if the processes are running. (If the WANBoot process is

not running when the SCF ALTER ADAPTER command is executed, the altered

attributes might not take effect.)

3. Use the SCF STOP SERVER, PATH, TASK, and ADAPTER commands to stop the

SWAN concentrator. In Example 3-17, the SCF STOP SERVER command with the

SUB ALL option stops the subordinate TASK and PATH objects.

4. Use the SCF ALTER ADAPTER command to reconfigure the SWAN concentrator

to use the new preferred TCP/IP process.

5. If the new preferred TCP/IP process is on a different subnet than the old preferred

TCP/IP process, then the PATH objects must be reconfigured with new IP

addresses.

Example 3-17. Stopping a SWAN Concentrator

STOP SERVER $ZZWAN.#S01.*, SUB ALL

STOP ADAPTER $ZZWAN.#S01

Example 3-18. Altering a SWAN Concentrator Definition

ALTER ADAPTER $ZZWAN.#S01, &

TCPIP tcpip-name &

HOSTIP ip-address