Hello,
This post is related to my previous one:
RT-AC87U - Daily freezes, required power cycling to restore
Short recap:
An Asus RT-AC87U router is connected to ISP modem/router via the WAN port (on the 192.168.1.0/24 subnet), and to a 24-ports gigabit ethernet switch via a LAN port to provide connectivity to our desktop PCs (on the 192.168.0.0/24 subnet). The router provides wifi connectivity and guest network to mobile devices.
The router gets its WAN IP from the ISP router via DHCP, its LAN IP is static. DHCP and DNS are served by another server (so these services are disabled).
Our problem:
We experienced random freezes on the Asus router (see linked post for details), and we thought that were its fault.
Later on we found instead that there were problems with ISP modem, and our provider sent a techie that found and solved problems on their cable and replaced their modem. This seemed to solve our problems for a while.
Recently problems came back, and looking carefully I've found that those freezes seems related to drops of connection on our ISP modem (recently they happen 5-6 times a day).
Those drops of connection usually last less than a minute - the modem restores its regular behaviour quite quickly - but as they happen the Asus router freezes and I need to power cycle it to restore regular operation.
I configured the Asus router to send its syslog to an Ubuntu server log, looked at it carefully for quite a long time, and can't see anything abnormal happening before router freezes.
Both modem and router are connected to an UPS, so I think I can exclude random power brownouts.
The only correlation I can see is with ISP modem resets - is anything I can do to prevent such freezes?
I'll complain with my ISP to solve connectivity problems, but I didn't expect that those problems on the modem could cause freezes on the router. Actually, I expected to be able to use local connectivity provided by the Asus router no matter what the ISP modem does.
Have you any suggestion? Can I do anything to solve or mitigate this problem?
I can provide the logs from the router, if you think they may be useful.
Thank in advance,
gerlos
This post is related to my previous one:
RT-AC87U - Daily freezes, required power cycling to restore
Short recap:
An Asus RT-AC87U router is connected to ISP modem/router via the WAN port (on the 192.168.1.0/24 subnet), and to a 24-ports gigabit ethernet switch via a LAN port to provide connectivity to our desktop PCs (on the 192.168.0.0/24 subnet). The router provides wifi connectivity and guest network to mobile devices.
The router gets its WAN IP from the ISP router via DHCP, its LAN IP is static. DHCP and DNS are served by another server (so these services are disabled).
Our problem:
We experienced random freezes on the Asus router (see linked post for details), and we thought that were its fault.
Later on we found instead that there were problems with ISP modem, and our provider sent a techie that found and solved problems on their cable and replaced their modem. This seemed to solve our problems for a while.
Recently problems came back, and looking carefully I've found that those freezes seems related to drops of connection on our ISP modem (recently they happen 5-6 times a day).
Those drops of connection usually last less than a minute - the modem restores its regular behaviour quite quickly - but as they happen the Asus router freezes and I need to power cycle it to restore regular operation.
I configured the Asus router to send its syslog to an Ubuntu server log, looked at it carefully for quite a long time, and can't see anything abnormal happening before router freezes.
Both modem and router are connected to an UPS, so I think I can exclude random power brownouts.
The only correlation I can see is with ISP modem resets - is anything I can do to prevent such freezes?
I'll complain with my ISP to solve connectivity problems, but I didn't expect that those problems on the modem could cause freezes on the router. Actually, I expected to be able to use local connectivity provided by the Asus router no matter what the ISP modem does.
Have you any suggestion? Can I do anything to solve or mitigate this problem?
I can provide the logs from the router, if you think they may be useful.
Thank in advance,
gerlos
