Hello,
It is possible to achieve your desired configuration, by configuring additional rules in router's WebUI Network -> Failover page.
Case 1: VLAN 10 to use 4G and failover to the ethernet wan (our VoIP Devices)
Simply configure failover interface order by giving a higher metric to mobile interface
![](https://community.teltonika-networks.com/?qa=blob&qa_blobid=8835244498821634981)
In addition, edit both interfaces settings by pressing pencil icon and append option Flush connections on with Connected and Disconnected.
![](https://community.teltonika-networks.com/?qa=blob&qa_blobid=8051319418006639229)
Case 2: VLAN 20 to use the Ethernet WAN and failover to the 4G (office devices)
In the Network -> Failover page add a new rule, for example VLAN20_Rule, press Add. In the rule configuration window, under policy section add a new failover policy with two interfaces, ordered as wan first, mob1s1a1 as second.
![](https://community.teltonika-networks.com/?qa=blob&qa_blobid=14282201521727987476)
Scroll to the top of the rule configuration section, add IP of your VLAN20 network IP as source address and assign the newly created policy. For example:
![](https://community.teltonika-networks.com/?qa=blob&qa_blobid=15946868380095198598)
Case 3: VLAN 30 to use the Ethernet WAN Only (guest devices)
In the Network -> Failover page add a new rule, for example VLAN30_Rule, press Add. In the rule configuration window, under policy section add a new failover policy with a single interface - wan.
![](https://community.teltonika-networks.com/?qa=blob&qa_blobid=1446897439968118507)
Scroll to the top of the rule configuration section, add IP of your VLAN30 network IP as source address and assign the newly created policy. For example:
![](https://community.teltonika-networks.com/?qa=blob&qa_blobid=16474524483411651250)
Lastly, exit rule configuration windows and place new rules above the default rule:
![](https://community.teltonika-networks.com/?qa=blob&qa_blobid=11866719426443191617)
Best regards,