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Forum Discussion
GS105Ev2 does not get IP address from DHCP
I have a brand new GS105Ev2 (GS105E-200NAS). It already has the latest firmware as of today, which is V1.6.0.11. I attached it to the network, and then applied power. It did automatically get an i...
Testing using the GS105PE on V1.6.0.17 and a GS308E on v1.0.11 and just adjusting the DHCP MAC LAN IP reservation address simply ticking the [x] Refresh and [Apply] does does trigger a a DHCP Discover and DHCP Request to bring both DUT to the new defined DHCP reserved LAN IP address. No DHCP ACK because it's not a confirmation of the previously used address.
Either way, only ticking the [x] Refresh and [Apply] does trigger a complete DHCP Discover, DHCP Request, and DHCP ACK.
Admit, I have no GS105Ev2 at hand. Rather simple to test, Wireshark fired up and listening, just the dhcp filter in - everything you are keen to see is broadcast on 0.0.0.0, the DHCP ACK is broadcasted to the .254 address in the case of the unchanged address.
Changing from DHCP to static does not retain the IP config - it's something I don't do very often. The Web UI will show this:
DHCP Mode
Note: Changing the protocol mode will reset the IP configuration.
I feel so defeated. I have tried and tried to reproduce this with the same GS105Ev2 switch, but cannot. If I change the allocated IP in the router and power cycle the switch, the switch now always gets the correct, allocated IP. I am not sure what changed to make it start working, other than the factory reset on the switch.
As an electrical engineer and software engineer that has had to trouble shoot many technical issues reported by end users over the years, I have no choice at this point other than to admit defeat and conclude that it must have somehow been a BTCATK error (Between The Chair And The Keyboard == user error). I am using VLANs, and I think I entered the exact same VLAN config after the factory reset as the initial VLAN config before the factory reset. But, it seems likely that I could have entered that initial VLAN config incorrectly, and that could have prevented the switch from hitting DHCP.
At this point, I am not going to investigate any further because it's working the way I want it to work.
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