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Dual SIM Failover

APPLICATION NOTE AN-003-WUK

DUAL SIM FAILOVER

Connection Management

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Summary of Contents for MRD-455

Page 1: ...Dual SIM Failover APPLICATION NOTE AN 003 WUK DUAL SIM FAILOVER Connection Management ...

Page 2: ...f wired networks it warrants extra precautions Especially when the consequences of losing contact with a remote network can be severe in terms of recovery costs and site visits This application note describes a basic and advanced method of SIM to SIM failover The advanced method configures the router to actively monitor the 4G link to test its ability to route traffic It then drops the link and go...

Page 3: ...d new profile and create a profile for your first SIM card provider Configuration Browse to Wireless Packet Mode SIM 1 APN Enter the APN Access Point Name given by your SIM card provider NB Standard 4G tariffs do not often require authentication ...

Page 4: ...ink For SIM 2 click Add new profile again and create a profile for your second SIM card provider as you did for SIM 1 Configuration SIM 2 Set the connection mode to Always connect and associate SIM 1 and 2 to the appropriate profile ...

Page 5: ...ds have equal priority The following example will cause the 4G link to fail over to the secondary SIM The link will remain on the secondary SIM until either the SIM is out of range of its network or disconnected It will then failover to the other SIM NB This method is suitable for mobile applications or where there is no SIM preference Rotate SIM P Failed establishment attempts before interface re...

Page 6: ...er a specified time NB This method is suitable if you have a preference for the primary SIM Rotate SIM P Failed establishment attempts before interface restart 3 default Failed establishment attempts before modem reboot 12 default Secondary SIM hold period mins 1800 These are the same settings as shown with option 1 except now include a timer to retry the connection over SIM card 1 Dual SIM Failov...

Page 7: ...nsmitting the link monitoring pings The amount of traffic generated by the monitoring pings can however be adjusted to make any additional costs if any negligible E g By decreasing the frequency of the pings if a quick recovery is not required Any additional data charges will almost certainly be less expensive and more convenient than sending an Engineer to site Dual SIM Failover Advanced Connecti...

Page 8: ... always on If the addresses go offline then the router will assume there has been a link failure disconnect the 4G link and enter recovery mode Remote Poll Setup NB Set up the backup poll type and address if you want to send test pings to a second IP address should pings to the primary IP address fail Send debug to the system log Verbose output to system log P ...

Page 9: ...x 2058 WLS PKT Failed to establish connection 3 consecutive times Nov 9 13 08 03 mrx 2058 WLS PKT restarting RF module Nov 9 13 08 06 mrx 2058 MSPDriver activated sim 2 If the router fails to re establish the link on SIM 1 it restarts the RF module after a specified number of failed establishment attempts and then activates SIM 2 Browse to Status Wireless View the Network Status Here you will see ...

Page 10: ...ivated sim 2 Connection Maintenenance and Remote Poll Status Nov 9 14 29 06 mrx 2058 ConnectionTester ICMP resetting This event appears when the test pings have failed The router will try and re establish the 4G link via the primary SIM but if it fails to do so then it activates SIM 2 NB If the 4G link fails to re establish on either SIM the router will eventually reboot the router as specified in...

Page 11: ...ceive and send SMS messages and does not need to be connected to the 4G network for the SMS function to work Status query P Browse to Wireless SMS reboot P This allows you to send an SMS text to the router with the trigger phrases Status query and Reboot The Status query SMS will return the link status including the signal strength The Reboot SMS will initiate a full reboot Although there shouldn ...

Page 12: ...Dual SIM Failover Revision Rev by Revision note Date 00 02 01 07 06 03 04 05 Revision history for version 1 0 ...

Page 13: ...Dual SIM Failover ...

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