As with NAT, DHCP issues are almost always due to an error in the configuration (jokingly referred to as a Layer 8 issue, meaning somebody messed up).
The service dhcp command is turned on by default, but sometimes it has been manually disabled by a network administrator for some reason. (I’ve seen network administrators call Cisco with urgent routing issues on their network after they entered the no ip routing command on their router – seriously!)
DHCP packets need to be permitted through your router if you are using a server on another subnet to administer DHCP configurations. DHCP uses . . .
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