I am having Cisco 871 router ISP is suggesting to put WAN interface is in DHCP mode So I have configured the IP address dhcp client ID in WAN ( fe/4 ). I am getting ip address and internet was fine after two day the internet is went down.
I have removed the configuration from WAN interface and I put it back that time the link is up and running. I have faced this same issue on three time. Please any on help on this