Interesting Network issue with E27

[Tomas Nanko]

Hello,

We have come across a rather interesting thing with the E27, on today’s install my Unifi Router that the E27 was plugged into only gave the panel an IP, Subnet Mask but NO DNS address, so no cloud connection or even correct time. Manually changing to a static IP everything started working fine.

E27 version 0.5.80 and later 0.6.4

Unifi USG Fiber OS 5.0.12

Network App 10.1.85

 

Thanks to ELKs tech support Chris (if I remember correctly) for the help figuring this out!!!

[Michael Burrell]

Thanks for sharing this and for the kind words about Chris. I am glad he was able to help get things sorted out.

What you ran into is related to the DHCP response from the router. If the DHCP server provides an IP address and subnet but does not include a DNS server in the response, the panel will still come online locally, but certain services will not function properly. Things like cloud connectivity, time synchronization, and other services rely on DNS to resolve hostnames.

Setting a static IP with a valid DNS server, like you did, is a perfectly good workaround.

In most cases routers will automatically include a DNS server in the DHCP offer, so this is not something we see often, but it can happen depending on how the router or network profile is configured. We will also review how the panel handles situations like this to see if we can improve the behavior to be more resilient in future updates.

Thanks again for the information and feedback. This kind of information really helps us improve our products and offerings.

Mike

[Author]

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