Si comme moi, vous utilisez un backup 4G pour fiabiliser votre connexion, je vous partages mon script de failover pour routeur Mikrotik.
https://github.com/loiklo/mikrotik/blob/main/failover-dhcp
Features:
- main/backup failover with 2 dhcp-client interfaces
- rely on multiple remote test hosts to decide if the main link is working properly
- automaticaly add/remove required routes to remote test hosts
- adjust testHosts routes if the gateway change
- configurable "ping success rate expected"
- stop pinging testHosts as soon as the expected rate is reached to avoid unnecessary traffic
- release DHCP lease in mainInterface on link failure to trigger a renew.
(This is usefull if the provider change the subnet on its side but our DHCP lease is not expired yet)
- doesn't need :global variable
- doesn't need specific configuration other than using dhcp-client on both main/backup interfaces
Limitations:
- hosts in testHosts array can't be reach through backupInterface if mainInterface receive a DHCP lease
- mainInterface and backupInterface must be configured in dhcp-client
- Only work with IPv4