Re: ip broadcast-address 0.0.0.0 - Who can tell me more about

From: darbyweaver@yahoo.com
Date: Sat May 13 2006 - 02:00:18 ART


ip dhcp limited-broadcast-address
To override a configured network broadcast and have the Dynamic Host Configuration Protocol (DHCP) server and relay agent send an all networks, all nodes broadcast to a DHCP client, use the ip dhcp limited-broadcast-address command in global configuration mode. To disable this functionality, use the no form of this command.

ip dhcp limited-broadcast-address

no ip dhcp limited-broadcast-address

Usage Guidelines
When a DHCP client sets the broadcast bit in a DHCP packet, the DHCP server and relay agent send DHCP messages to clients using the all ones broadcast address (255.255.255.255). If the ip broadcast-address command has been configured to send a network broadcast, the all ones broadcast set by DHCP is overridden. To remedy this situation, use the ip dhcp limited-broadcast-address command to ensure that a configured network broadcast does not override the default DHCP behavior.

Some DHCP clients can only accept an all ones broadcast and may not be able to acquire a DHCP address unless this command is configured on the router interface connected to the client.

Examples
The following example configures DHCP to override any network broadcast:

ip dhcp limited-broadcast-address



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