DHCP IP configured on the router is not available on the SG110D-08

[luv2irene]

DHCP does not work after two weeks of using the Cisco SG110D-08 switch.
The switch I was using until last night without any problems suddenly got into trouble this morning.
The switch ignores the DHCP set by the router and allocates the IP of the switch to the devices.
The router uses the 192.168.50.x address, but the switch assigns devices to the 169.254.x.x address.
Is the switch broken?
In just two weeks?

[Kasun Bandara]

@luv2irene hi, we need to clear some things here. 

for your note, 169.254.x.x is not assigned by switch. it is ip range automatically assigned by endpoint when they cannot get IP from DHCP server. SG110 is unmanageable switch which do not involve in DHCP process. you can try below things.

1. check router's config and make sure config is correct and DHCP pool is have not exhausted.

2. configure manual IP in endpoint using same range it should be (192.168.50.x) and check if you can ping to router or other IPs.

3. make sure connectivity between router - switch - end point is correct.