Setup a dummy interface

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mad_ady

Regular Contributor
I'm running RMerlin 380.69-0 on my RT-AC56U and I'm experiencing some problems with DHCP - sometimes the router stops responding to DHCP (devices with fixed IP can still work).
I'd like to write a small watchdog script that periodically tries to get an IP via DHCP and if it can't it can take corrective actions. I'd like to run this script directly on the router, so I thought I could create a dummy interface, bridge it to br0 and run dhclient on it so that I can see if it gets an IP or not.
Problem is there is no dummy module available.
Any ideas if I can create a virtual network interface (vlan maybe?) that is not connected to anything?
Thanks
 

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