Not capture DHCP IP Address


Dear Sir.

Subject: Not capture DHCP IP Address.

Grandstream GXP2170 Firmware Version &,And Other GXP-16xx,GXP-2135,

When I set Network type DHCP That time Phone Display Showing NETWORK DOWN,But if i configure Static and put the IP Address That time Phone is Registerd and working fine.
Office Network IS Both mode DHCP & Static.

Some Phone is Already Working DHCP Mode,GXP-2170,GXP-1625.GXP-2135,GXP-3370.
Kindly Give me solution


Check gateway ? I think phone check if it have access to internet.


Same LAN Port and Some phone working.


Check DHCP pool, i remember similar problem when DHCP pool was full.