Internet connection dropping out when using static IP for external interface
I recently received a static IP address from my ISP and was hoping to configure the external interface to use this. Currently, it is set to use DHCP as from the Dashboard I can see that the IP address is aaa.bbb.ccc.66, the gateway is aaa.bbb.ccc.254 and the netmask is 255.255.248.0. These values were also confirmed by one of the support agents from my ISP.
When I tried to switch the external interface to static IP and enter those same details (with the netmask as /21), after about 90 minutes the internet connection dropped. As soon as I switched the interface back to DHCP mode, it started working again. I'm not quite sure what is causing it since the DHCP configuration seems to be exactly the same as the static IP configuration provided by my ISP.
Any advice is greatly appreciated.