Why would a PING TO AN ISP's DNS SERVER FAIL

Closed
DNAGGIE Posts 2 Registration date Monday June 2, 2014 Status Member Last seen July 27, 2014 - Jul 27, 2014 at 01:30 PM
signals of the cpe are all okay, my account to the isp is health, i have no configs on my adapter, my cpe is receiving dhcp and laptop is receiving dhcp from the cpe. why ping to the ISP's dns server fails and also googles dns 8.8.8.8. but the moment an IP address is slotted in my CPE all would ping. the cpe is a wimax. anyone with ideas?