Hi Pradeep,
ZD1100 comes with two 1 Gig ports. Could you check if both ports are not working or just one.
If both eth ports are not working then device cannot communicate with network, so you have to replace this device.
Even if you configure things from CLI, how ZD will communicate with network. It needs network connection over eth ports for AP/ZD communication and internet.
Regards,
Syamantak Omer
Syamantak Omer | Community moderator | Staff TSE | CWNA | CCNA | RASZA | RICXI | Follow me at https://linkedin.com/in/syamantak-omer-5949b6124