Users Guide

Layer 3 Routing Commands 1481
Configuring the command globally enables server-override globally (on all
routing interfaces). Any DHCP packet received from a DHCP Client will
have sub-option 5 and sub-option 11 for option 82 added to the packet.
When this command is issued in interface config mode, server-override is
enabled for that interface only. Configure this option on the
DHCPDISCOVER incoming interface, that is, the DHCP host facing
interface.
Refer to RFC 5107 DHCP Server Identifier Override Suboption for further
information.
Example #1
The following example enables server-override globally.
console#configure
console(config)#bootpdhcprelay server-override
Example #2
The following example enables server-override on interface gi1/0/26.
console#configure
console(config)#interface gi1/0/26
console(config-if-Gi1/0/26)#bootpdhcprelay server-
override
Command History
Command introduced in version 6.7.0 firmware.
ip dhcp relay source-interface
Use the ip dhcp relay source-interface command to configure a DHCP Relay
source interface IP address.
Syntax
ip dhcp relay source-interface interface { interface-id | vlan <vlanId> |
loopback <loopbackId> }
no ip dhcp relay source interface
• interface-id—A physical or port-channel interface with an IPv4 address.
• vlanID—A configured routing VLAN interface identifier.