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25: Automatic operator selection

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GW1000 Series User Manual

Issue: 1.9 Page 189 of 350

There are typcailly three scenarios:

 Primary Mobile Provider (PMP) + roaming: pre-empt enabled

 PMP + roaming: pre-empt disabled

 No PMP + roaming

25.2.1 Scenario 1: PMP + roaming: pre-empt enabled

25.2.1.1 Overview

In this scenario, the PMP interface is used whenever possible.

The PMP interface is attempted first. When the health checks fail on the PMP interface,

and Multi-WAN moves to an autogenerated interface, a timer is started multiwan

option ifup_retry_sec. On expiration of this timer, multiwan will disconnect the

current interface and retry the PMP interface.

The PMP interface will then be used if the configurable number of health checks pass the

checks.

25.2.1.2 Software operation

1. Multiwan first attemts to bring up the PMP interface. If the PMP interface connects

within the time set by multiwan option ifup_timeout continue to step 2. Otherwise

go to step 4.

2. A health check is periodically done on the PMP interface as determined by the

multiwan option health_interval. If the health check fails for the number of retries

(multiwan option health_fail_retries), disconnect the PMP interface.

3. Connect the first auto-generated interface.

4. If the interface connects within the time set by multiwan option ifup_timeout

continue to step 5, otherwise multiwan moves to the next auto-generated interface.

5. Wait until the health check fails on the auto-generated interface, or until the PMP

interface is available to connect after it was disconnected in step 2. (multiwan option

ifup_retry_sec).

6. Disconnect auto-generated interface.

7. If the interface was disconnected due to health check failure then connect the next

auto-generated interface and repeat step 4. If the interface was disconnected

because ifup_retry_sec of PMP interface timed out, then go back to step 1 and

repeat the process.

The PMP predefined interface is defined in the network package. Ensure the interface

name matches the interface name defined in the multiwan package.

25.2.1.3 Create a primary predefined interface

In the web interface top menu, go to Network ->Interfaces. The Interfaces page

appears.

virtual access GW2024P-2 User Manual

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