since some time (and i think it has been quite a long time) i have a ZD1100 randomly crashing.
To be honest, 2 ZD died in a row on this site, gone to RMA. So i'm running on a spare one, kept the old config, and i observe the same crashes, so its doesn't look hardware related.
The ZD1100 is running the latest available firwmare, and controls 16 R500.
The configuration is really quite simple, no Vlans, not even client isolation, this is basic non authentifcated wifi access (i have a separate captive portal applicance that manages user access).
So randomly (twice a day sometimes, then nothing during 1 month) it crashes : at first customers can't connect to the network, then the SSID disaprears. And lastly the ZD isn't even reachable.
A simple reboot solves the issue, but i can't figure why. Simple logs does not show anything.
At first i thought it could be my captive portal, maybe running out of available ips of whatever, but rebooting the captive portal appliance doesn't solve anything, while rebooting the ZD makes the issue disapear...
I have dozens of other installations, not a single issue like that!
We had 2x 1200s that had a similar situation about a year ago.
WE controlled around 30 7363 APs and ran around 5 SSIDs. We routed all VLAN traffic back through the ZD as advised but found that the units after no set period of time would failover and get stuck in a loop. When we switched off the redundant unit the same thing happened. Nothing in the logs, no real reason.
In the end we had a in depth conversation with Ruckus and although the level of traffic was well within scope of that ZD it became obvious that the ZD wasn't up to the task so needed to upgrade to the 3000. We did that over a year ago now and I've never seen a crash...
Might be worth reviewing the SSID config to see if you have the same problem.
I haven't seen ZDs "die" other than hw, never two in a row...? And only 16 x R500s, even with 5 SSIDs all tunneled to the ZD should not impact a ZD1100 CPU so much, unless you're running multiple Guest Access and HotSpot WLANs (that require ZD processing), with maximum AP clients.
The latest release fixes some issue resulting in a warm restart randomly due to SSH attempts from outside the network trying to gain access and other random restarts. I am not sure if the 1100 supports the latest 9.12/9.13 firmware.