Hi, got some problems with my ZTE MF821D 4G Dongle. My CRS125 recognizes the dongle as an LTE device, and adds the interface. The ZTF got an web-interface for pin-input etc, on adress 192.168.0.1 (my local LAN is on 192.168.1.1) and I can reach this web-interface from my LAN. I also added an DHCP-Client to the LTE interface, as the ZTF has built in DHCP-server. I also added a masqurade rule, to allow internet access from LAN, in IP-Routes the gateway shows as reachable, and DHCP-Client shows up as “bound” with an assigned ip 192.168.0.100. Until this point, everything looks good.
I then have a script set-up for WAN failover. I used the one provided here : http://wiki.mikrotik.com/wiki/Failover_Scripting
(I tried it with Android yesterday, and it worked like a charm).
Once i plug out my primary-wan cable, it increases the primary-wan distance, and decreases the failover-wan (4g) route. Then the problem starts, my log shows this :
If I go to DHCP-Client now, it shows “bound”, “searching”, “bound” and so on.. Once I plug in my primary-wan cable again, thing settles. The LTE interface is no longer visible, and I have to re-plug it to the USB to show it again.
System information :
Dongle : ZTF MF821D (latest fw)
Router : CRS125
ROs : 6.23