Configuring the DHCP server to broadcast all responses
By default, the DHCP server broadcasts a response only when the broadcast flag in the DHCP request is set to 1. You can configure the DHCP server to ignore the broadcast flag and always broadcast a response. This feature is useful when some clients set the broadcast flag to 0 but do not accept unicast responses.
The DHCP server always unicasts a response in the following situations, regardless of whether this feature is configured or not:
The DHCP request is from a DHCP client that has an IP address (the ciaddr field is not 0).
The DHCP request is forwarded by a DHCP relay agent from a DHCP client (the giaddr field is not 0).
To configure the DHCP server to broadcast all responses:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enable the DHCP server to broadcast all responses. | dhcp server always-broadcast | By default, the DHCP server reads the broadcast flag to decide whether to broadcast or unicast a response. |