DHCP Relay Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 32-3
ip helper address
Adds or deletes a DHCP server IP address. DHCP Relay forwards BOOTP/DHCP broadcasts to and from
the specified address. If multiple DHCP servers are used, configure one IP address for each server.
ip helper address ip_address
ip helper no address [ip_address]
Syntax Definitions
ip_address DHCP server IP address (e.g. 21.0.0.10).
Defaults
N/A
Platforms Supported
OmniSwitch 6250
Usage Guidelines
• Using this command enables a Global DHCP Relay service on the switch. When the DHCP Relay is
specified by the DHCP server IP address, the service is called Global DHCP.
• When the DHCP Relay is specified by the VLAN number of the DHCP request, the service is referred
to as Per-VLAN DHCP.
• Global DHCP and Per-VLAN DHCP are mutually exclusive. You may only configure one or the other.
• Use the no form of this command to delete an IP address from the DHCP Relay service. If an address
is not specified, then all addresses are deleted.
• UPD Relay is automatically enabled on a switch when a DHCP server IP address is defined. There is
no separate command for enabling or disabling the relay service.
• Configure DHCP Relay on switches where packets are routed between IP networks.
• You can configure up to 256 server IP addresses for one relay service.
Examples
-> ip helper address 75.0.0.10
-> ip helper no address 31.0.0.20
Release History
Release 6.6.1; command was introduced.
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